[ { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tjr0a-dav09", "eprint_id": 50268, "eprint_status": "archive", "datestamp": "2023-08-19 02:36:03", "lastmod": "2023-10-17 22:53:27", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Converse-F-J", "name": { "family": "Converse", "given": "Frederick J." } }, { "id": "Jones-W-F", "name": { "family": "Jones", "given": "William F." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "George W." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } }, { "id": "Wilson-D-M", "name": { "family": "Wilson", "given": "David M." }, "orcid": "0000-0001-6002-423X" }, { "id": "Ribbens-R-E", "name": { "family": "Ribbens", "given": "Rudolf E." } } ] }, "title": "Further Studies on Vibration Compaction of Cohesive Soils", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a91955 California Institute of Technology.\n\nA research project sponsored by U. S. Navy Bureau of Yards and Docks, U. S. Naval Civil Engineering and Research Laboratory Port Hueneme, California.\n\n
Submitted - Further_Studies_on_Vibration_compaction_of_cohesive_soils.pdf
", "abstract": "The investigations described in this report are a continuation of previous work\ndesigned to determine the basic laws governing the compaction of cohesive soil by vibration.\nA report dated December, 1954, described the results of tests on sandy loam, while\nthis report describes similar tests on a much more cohesive soil.", "date": "2014-10-09", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechAUTHORS:20141008-111748758", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20141008-111748758", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "U. S. Navy Bureau of Yards and Docks" } ] }, "primary_object": { "basename": "Further_Studies_on_Vibration_compaction_of_cohesive_soils.pdf", "url": "https://authors.library.caltech.edu/records/tjr0a-dav09/files/Further_Studies_on_Vibration_compaction_of_cohesive_soils.pdf" }, "resource_type": "monograph", "pub_year": "2014", "author_list": "Converse, Frederick J.; Jones, William F.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gp83m-7kt75", "eprint_id": 25023, "eprint_status": "archive", "datestamp": "2023-08-19 12:52:10", "lastmod": "2023-10-24 15:33:17", "type": "book", "metadata_visibility": "show", "creators": { "items": [ { "id": "Housner-G-W", "name": { "family": "Housner", "given": "George W." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Applied Mechanics Dynamics", "ispublished": "unpub", "full_text_status": "public", "keywords": "Mechanical Engineering", "note": "Originally published as vol. 2 of: Applied mechanics. Princeton, N.J. : Van Nostrand, 1959-1961\n\nPublished - Housner-HudsonDyn80.pdf
", "abstract": "The present edition incorporates a number of revisions and additions which should improve its usefulness as a textbook without changing the basic organization or the general philosophy of presentation of the subject matter. The experience of the past few years at the California Institute of Technology and other schools indicates that the book has been useful to engineering students who wish to prepare for more advanced studies and applications of dynamics, and hence a new edition was felt to be justified. \n\nAmong the additions and modifications the following may be mentioned to indicate the scope of the revision. The section on dimensional analysis has been rewritten and a brief treatment of the theory of models has been added. The section on impact problems has been revised, and a more extensive treatment of variable mass systems has been included. A more general discussion of the moment of momentum equations for systems of particles has been added, and the general momentum and energy equations for rigid bodies have been more completely developed. The discussion of rotation about a fixed point and gyroscopic motion has been expanded and somewhat more complex systems have been considered, including problems on the stability of rolling motion. The problem of longitudinal waves in an elastic bar is discussed, and a comparison is made between wave propagation techniques and vibration methods for such problems. The discussion of generalized coordinates and Lagrange's equations has been revised, and a general treatment of the problem of small oscillations of a conservative system has been added. The sections on the Calculus of Variations and Hamilton's Principle have been rewritten with some expansion. \n\nOver one hundred new problems have been added to increase the total number to some four hundred. All of the new problems have been thoroughly tested in classroom use. The number of illustrative examples has been increased and many of the original examples have been modified. \n\nAs in the first edition, the main emphasis of the book is on particle and rigid-body dynamics, although some other aspects of the subject have been included to show how the methods of classical mechanics are applied to the various branches of engineering science. Some of these topics, such as fluid dynamics and the kinetics of gases, have been treated in a very brief fashion. Although the student will make a more complete analysis of these subjects in specialized courses, it is believed that the brief discussions will help him to acquire a broader view of the applied sciences. In all such instances care has been taken to use methods that can be extended later for more complete treatments, and the student has been informed of the limitations of the analyses. \n\nAs a textbook the main emphasis has been on method and on development of fundamental principles. The problems form an essential part of the presentation, and important conclusions are sometimes given in problems and illustrative examples. The student should examine such problems and note the results, even if the details of the proofs are not carried through.", "date": "1980", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechBOOK:1980.001", "official_url": "https://resolver.caltech.edu/CaltechBOOK:1980.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "primary_object": { "basename": "Housner-HudsonDyn80.pdf", "url": "https://authors.library.caltech.edu/records/gp83m-7kt75/files/Housner-HudsonDyn80.pdf" }, "resource_type": "book", "pub_year": "1980", "author_list": "Housner, George W. and Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cer1b-qdk35", "eprint_id": 49567, "eprint_status": "archive", "datestamp": "2023-08-19 09:35:25", "lastmod": "2023-10-17 21:33:24", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } }, { "id": "Jephcott-D-K", "name": { "family": "Jephcott", "given": "D. K." } } ] }, "title": "A reply to \"Comments on 'The San Fernando Earthquake and Public School Safety'\" by Donald A. Rodgers", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1975 Seismological Society of America.\n\nManuscript received March 24, 1975.\n\nPublished - 1509.full.pdf
", "abstract": "Mr. Rodgers has properly drawn attention to the fact that ideas for limiting conditions\nof earthquake ground motion must inevitably involve some speculation. For purposes\nof the present study, however, the evidence from several lines of approach is so consistent\nthat the practical conclusions are clear, and we welcome the opportunity to again\nemphasize them.", "date": "1975-10", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "65", "number": "5", "publisher": "Seismological Society of America", "pagerange": "1509-1510", "id_number": "CaltechAUTHORS:20140910-160241266", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140910-160241266", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "1509.full.pdf", "url": "https://authors.library.caltech.edu/records/cer1b-qdk35/files/1509.full.pdf" }, "resource_type": "article", "pub_year": "1975", "author_list": "Hudson, D. E. and Jephcott, D. K." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/csqrw-dp742", "eprint_id": 49647, "eprint_status": "archive", "datestamp": "2023-08-19 09:09:01", "lastmod": "2023-10-17 21:36:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } }, { "id": "Jephcott-D-K", "name": { "family": "Jephcott", "given": "D. K." } } ] }, "title": "The San Fernando earthquake and public school safety", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1974 Seismological Society of America.\n\nManuscript received May 16, 1974.\n\nAppreciation is expressed to officials of the Los Angeles Unified School District for assistance with the\nschool location map and for information on school damage. The project was made possible by a grant\nfrom the National Science Foundation. Support from the Earthquake Research Affiliates program of the\nCalifornia Institute of Technology is also gratefully acknowledged.\n\nPublished - 1653.full.pdf
", "abstract": "The San Fernando earthquake was an unusually valuable test of school safety because: (1) there were several hundred schools having structures of all types in the heavily shaken area, including 10 schools within 5 miles of the epicenter; (2) the severity of ground motion is believed to have been near the maximum to be expected for an earthquake of any size\u2014a number of campuses were subjected to major ground cracking and deformation; (3) since there were many instruments in the area, the details of the earthquake ground motion are better known than for any other earthquake. On some campuses, pre-Field Act buildings, renovated pre-Field Act buildings, and new buildings existed side by side, and direct comparisons show the efficacy of the Field Act and the associated plan check and field inspection procedures in reducing the earthquake hazard to an acceptably low level. No structural failures, that would have been likely to cause serious injury or death if the buildings had been normally occupied at the time of the earthquake, occurred in any buildings built to current standards. There were, however, some failures of nonstructural elements that could have resulted in a hazardous situation and demonstrate the need for upgrading requirements in this area of building construction.", "date": "1974-12", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "64", "number": "6", "publisher": "Seismological Society of America", "pagerange": "1653-1670", "id_number": "CaltechAUTHORS:20140912-092837597", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140912-092837597", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" }, { "agency": "Caltech Earthquake Research Affiliates" } ] }, "primary_object": { "basename": "1653.full.pdf", "url": "https://authors.library.caltech.edu/records/csqrw-dp742/files/1653.full.pdf" }, "resource_type": "article", "pub_year": "1974", "author_list": "Hudson, D. E. and Jephcott, D. K." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/c9z96-ggh40", "eprint_id": 26436, "eprint_status": "archive", "datestamp": "2023-08-19 08:48:05", "lastmod": "2023-10-24 16:19:28", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jephcott-D-K", "name": { "family": "Jephcott", "given": "Donald K." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "The performance of public school plants during the San Fernando earthquake", "ispublished": "unpub", "full_text_status": "public", "note": "PB 240 000/AS", "abstract": "The epicenter of the San Fernando earthquake was just 25 miles from the Earthquake Engineering Research Laboratory of the California Institute of Technology, which has been for some 50 years actively studying the problem of earthquake resistant design. It was therefore most natural that the EERL was very quickly involved in a number of major investigations growing out of the event. Several Earthquake Engineering research grants from the National Science Foundation to the EERL were in effect at the time and provided the framework for an expanded NSF sponsorship of additional special studies.\n\nThese expanded NSF assignments included a responsibility to investigate those aspects of earthquake damage for which important evidence might quickly disappear through demolition, repairs, etc., and also those for which significant studies might otherwise not be made because of a lack of adequate resources. Both of these aspects were involved in the important matter of the earthquake behavior of school buildings.\n\nThe whole question of the earthquake safety of the schools very quickly came to the attention of the EERL staff, through service on the Los Angeles County Earthquake Commission, as consultants to the Los Angeles Unified School District in evaluating the postearthquake safety of schools, and a natural historical consequence of past studies of the Long Beach 1933 earthquake. Since it became apparent that detailed studies of the school situation were not likely to be made by existing public agencies, it was decided that a portion of the NSF emergency grant resources should be used for this purpose. These resources were later expanded by NSF through a supplemental research grant for the particular objective of completing a comprehensive report on the behavior of school buildings during the San Fernando Earthquake.\n\nThe San Fernando earthquake was an unusually valuable test of school safety because: (1) there were several hundred schools having structures of all types in the heavily-shaken area, including 10 schools within 5 miles of the epicenter; (Z) the severity of ground motion is believed to have been near the maximum to be expected for an earthquake of any size--a number of campuses were subjected to major ground cracking and deformation; (3) since there were many instruments in the area, the details of the earthquake ground motion are better known than for any other earthquake. On some campuses, pre-Field Act buildings, renovated pre-Field Act buildings, and new buildings existed side by side, and direct comparisons show the efficacy of the Field Act and the associated plan check and field inspection procedures in reducing the earthquake hazard to an acceptably low level.\n\nThe study became feasible through the cooperation of the California State Office of Architecture and Construction in making available as a consultant the services of Mr. Donald K. Jephcott, Principal Structural Engineer in charge of the Structural Safety Section (formerly Schoolhouse Section) of the Los Angeles office. Two members of Mr. Jephcott's staff, Mr. Leon Stein and Mr. Byrne Eggenburger, assisted as consultants in the preparation of several of the detailed descriptions of the school plants. We are also much indebted to the Los Angeles Unified School District for making available much information and many drawings which simplified our task.\n\nWe are pleased to acknowledge also the assistance of the Earthquake Research Affiliates program of the California Institute of Technology in providing financial support for portions of this study.", "date": "1974-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1974.EERL-74-01", "official_url": "https://resolver.caltech.edu/CaltechEERL:1974.EERL-74-01", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "7401.pdf", "url": "https://authors.library.caltech.edu/records/c9z96-ggh40/files/7401.pdf" }, "resource_type": "monograph", "pub_year": "1974", "author_list": "Jephcott, Donald K. and Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/59f4d-qyb49", "eprint_id": 49642, "eprint_status": "archive", "datestamp": "2023-08-19 08:21:20", "lastmod": "2023-10-17 21:36:15", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "International Journal of Earthquake Engineering and Structural Dynamics [Book Review]", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1973 Seismological Society of America.\n\nBook review of: International Journal of Earthquake Engineering and Structural Dynamics, John Wiley & Sons, Ltd.\nBaffins Lane, Chichester, Sussex, England.\n\nPublished - 332.full.pdf
", "abstract": "In recent years, earthquake engineering has increasingly assumed an identity as an important specialty\nwithin the wider framework of the science of seismology, on the one hand, and the engineering science of\nstructural dynamics, on the other. The subject first appeared formally on the international scene as recently\nas 1956, with the First International Conference on Earthquake Engineering which resulted later\non in the formation of the International Association for Earthquake Engineering. Since that time the\n1AEE has organized very successful conferences in Japan (1960), New Zealand (1965), Chile (1969), and\nis now planning for the Fifth World Conference in Italy (1973). The new Journal, which serves also as an\nofficial journal for the IAEE, is under the general editorship of Professor Ray W. Clough and the associate\neditorship of Professor Geoffrey B. Warburton. The very extensive experience and wide backgrounds\nof these distinguished editors will ensure the highest professional standards for the new publication. Eight\nmembers of the 21-man Advisory Editorial Board are members of the Seismological Society of America,\nincluding IAEE President George W. Housner, who, along with Editor Clough, is also serving as a\nmember of the S.S.A. Board of Directors. It is intended that the new Journal should deal broadly with\nall phases of earthquake engineering, \"from the seismological and geological factors which influence the\nrecurrence interval and dynamic characteristics of the ground motion to be expected at a given site, to the\nestablishment of building codes and standards which will provide adequate and economically sound\nprotection for the life and property of the public . . . . The scope of the Journal will include papers on\ntechniques of structural dynamic analysis, regardless of their field of application.\" The contents of the\ninitial issue indicate many of the basic themes: Housner and Jennings on\" The San Fernando, California,\nEarthquake\"; Muto on \"Dynamic Response of the KII Building to the San Fernando Earthquake\";\nWarburton and Higgs on \"Vibration of Cylindrical Shells with Clamped Ends\"; Penzien and Kaul on\n\"Response of Offshore Towers to Strong Motion Earthquake\"; Iyengar and Shinozuka on \"Effects of\nSelf-Weight and Vertical Acceleration on the Behavior of Tall Structures During Earthquakes\"; Hisada,\nOhmcri, and Bessho on \"Earthquake-Design Considerations in Reinforced Concrete Columns\"; and\nJohns, Britton, and Stoppard on\" Increasing the Structural Damping of a Steel Chimney.\" Many readers\nof the Bulletin of the Seismological Society of America are certain to find much material of interest in the\nnew Journal, and the SSA Editorial Committee is happy to welcome this new publication with best\nwishes for a long and distinguished career.", "date": "1973-02", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "63", "number": "1", "publisher": "Seismological Society of America", "pagerange": "332", "id_number": "CaltechAUTHORS:20140912-091036947", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140912-091036947", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "332.full.pdf", "url": "https://authors.library.caltech.edu/records/59f4d-qyb49/files/332.full.pdf" }, "resource_type": "article", "pub_year": "1973", "author_list": "Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gpc7v-k7758", "eprint_id": 49672, "eprint_status": "archive", "datestamp": "2023-08-19 08:09:16", "lastmod": "2023-10-17 21:37:26", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Local distribution of strong earthquake ground motions", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1972 Seismological Society of America.\n\nManuscript received June 26, 1972.\n\nThanks are expressed to Drs. A. G. Brady and A. Vijayaraghavan for assistance with data processing,\nand to Dr. M. D. Trifunac of the Lamont-Doherty Geological Observatory of Columbia University and\nthe California Institute of Technology for the development of computational techniques. I am grateful\nto Professor R. F. Scott for preparing the calculated seismoscope response plots. Mr. Richard J. Dietman\nvery effectively carried out the instrumental program of field installation and maintenance. The field\ninstruments are a part of the southern California network maintained by the Seismological Field Survey\nof the National Oceanic and Atmospheric Administration, U.S. Department of Commerce, whose cooperation\nis appreciated. The project has received basic support from the National Science Foundation\nand from the Earthquake Research Affiliates program of the California Institute of Technology.\n\nPublished - 1765.full.pdf
", "abstract": "Twenty ground stations distributed over a 40-square-mile area in Pasadena recorded strong ground shaking during the San Fernando earthquake of February 9, 1971. Relative responses at 10 of these same stations as measured for small earthquakes by standard Wood-Anderson torsion seismometers are available for comparison from a study made by Gutenberg in the 1950's. Frequency spectra of strong ground motions as calculated for four sites having time-recording accelerographs assist in the interpretation of seismoscope results at the other stations. Attempts to correlate local distributions with known features of local geology such as thickness of alluvium, distance from known faults, etc., indicate that no single feature plays a dominant role in the resulting patterns. The implications of such complicated distributions for the preparation of seismic risk maps are discussed, and it is concluded that it would not be possible in the present state of knowledge to assess meaningful variations in the seismic risk throughout the Pasadena area.", "date": "1972-12", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "62", "number": "6", "publisher": "Seismological Society of America", "pagerange": "1765-1786", "id_number": "CaltechAUTHORS:20140912-135246164", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140912-135246164", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" }, { "agency": "Caltech Earthquake Research Affiliates" } ] }, "primary_object": { "basename": "1765.full.pdf", "url": "https://authors.library.caltech.edu/records/gpc7v-k7758/files/1765.full.pdf" }, "resource_type": "article", "pub_year": "1972", "author_list": "Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/w220w-fzf98", "eprint_id": 122102, "eprint_status": "archive", "datestamp": "2023-08-19 08:07:19", "lastmod": "2023-10-20 18:59:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Strong Motion Seismology", "ispublished": "unpub", "full_text_status": "public", "note": "Strong motion seismology is indebted to the long range program of the Seismological Field Survey of the National Oceanic and Atmospheric Administration (formerly the U. S. Coast and Geodetic Survey) for much of its present knowledge of strong earthquake ground motion. Basic instrumentation and data processing developments have been largely the product of the Earthquake Engineering Research Laboratory of the California Institute of Technology, under the sponsorship of the National Science Foundation and the Caltech Earthquake Research Affiliates. I have profited much from many discussions of the above matters with my colleague Professor M. D. Trifunac.\n\nPublished - Hudson_1972p29.pdf
", "abstract": "Strong motion seismology is defined and placed in context with Seismology and Earthquake Engineering. Current methods and techniques are outlined, along with the main results obtained, with emphasis on the implications for the basic problems of seismic risk zoning. Under experimental methods, attention is given to the basic characteristics of modern strong motion accelerographs, and major results obtained are summarized. \n\nSimplified instrumentation is briefly described, and current strong motion networks are outlined, with comments on problems of site selection and economics of network design. Current data processing techniques for strong motion accelerograms are discussed and modern improvements in data recovery capabilities are described. Distribution of local strong ground motions as measured during the 1971 San Fernando earthquake are discussed, and spectral properties of strong ground motion are given for some recent investigations at the El Centro, California, accelerograph site. \n\nComments are made on non-instrumental seismology, intensity scales, and isoseismal maps. Recent theoretical work on seismic source parameters is summarized, and determinations of such parameters as seismic moment and stress drop from far-field and near-field spectra are discussed. \n\nImplications of source multiplicity for earthquake engineering problems are pointed out. The importance of transmission path effects on local distribution of strong ground motions is emphasized, and examples are given of the influence of surface topography, subsurface nonuniformities, and layer boundaries on surface motion. Some comments are made on the influence of instrument characteristics and data processing on accelerogram characteristics. Some factors involving geologic faults and earthquakes are discussed, with an evaluation of the relationship between faults and seismic hazards.", "date": "1972-11", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20230702-040823138", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230702-040823138", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" }, { "agency": "Caltech Earthquake Research Affiliates" } ] }, "primary_object": { "basename": "Hudson_1972p29.pdf", "url": "https://authors.library.caltech.edu/records/w220w-fzf98/files/Hudson_1972p29.pdf" }, "resource_type": "book_section", "pub_year": "1972", "author_list": "Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/r3pr4-h1w97", "eprint_id": 49852, "eprint_status": "archive", "datestamp": "2023-08-19 07:52:48", "lastmod": "2023-10-17 22:15:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "Dynamic Waves in Civil Engineering [Book Review]", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1972 Seismological Society of America.\n\nBook review of: Dynamic Waves in Civil Engineering. Howells, D. A., Haigh, I. P., and Taylor, C., Editors. Proceedings of\na Conference organized by the Society for Earthquake and Civil Engineering Dynamics held at University\nCollege of Swansea on July 7-9, 1970, Wiley-Interscience, John Wiley & Sons, Ltd., London,\nNew York, Sydney, Toronto, 1971.\n\nPublished - 665.2.full.pdf
", "abstract": "These proceedings of a conference organized by the Society for Earthquake and Civil Engineering\nDynamics, which is the British National Section of the International Association for Earthquake Engineering,\nbring together 19 papers from England, 6 from the United States, 3 from the USSR, and single\ncontributions from Australia, South Africa, and India. About half of the papers are of direct interest to\nearthquake engineers; of the others, 6 involve mainly ocean waves and their effects on coastal structures,\n5 treat of soil and structural dynamics problems of general interest, 2 are concerned with design for wind\nloads, and the remaining involve background material of a theoretical or mathematical nature, including\nan introductory paper on the historical background of the applied mathematics of waves by M. J. Lighthill.", "date": "1972-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "62", "number": "2", "publisher": "Seismological Society of America", "pagerange": "665-666", "id_number": "CaltechAUTHORS:20140919-101958982", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140919-101958982", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "665.2.full.pdf", "url": "https://authors.library.caltech.edu/records/r3pr4-h1w97/files/665.2.full.pdf" }, "resource_type": "article", "pub_year": "1972", "author_list": "Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/svmj1-svv10", "eprint_id": 49714, "eprint_status": "archive", "datestamp": "2023-08-19 07:36:35", "lastmod": "2023-10-17 22:06:32", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trifunac-M-D", "name": { "family": "Trifunac", "given": "M. D." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "Analysis of the Pacoima dam accelerogram\u2014San Fernando, California, earthquake of 1971", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1971 Seismological Society of America.\n\nManuscript received May 3, 1971.\n\nThe existence of the Pacoima accelerogram is a tribute to the success of the long-range program\nestablishing the Southern California strong-motion accelerograph network under the supervision\nof W. K. Cloud, Chief of the Seismological Field Survey, and R. P. Maley, in charge of the Los\nAngeles office, of the NOAA National Ocean Survey.\nWe much appreciate the numerous contributions of Richard J. Dielman of the Earthquake\nEngineering Research Laboratory of the California Institute of Technology to all aspects of the\nprogram of instrument installation, servicing, record collection and development, and laboratory\ninstrument evaluation.\nV. Perez of the NOAA Seismological Field Survey assisted with the digitization of the Pacoima\naccelerogram; and Dr. A. G. Brady of the Caltech group carried out details of the data processing.\nWe are indebted to the Los Angeles County Flood Control District for their forward-looking\nprogram of instrumentation and in particular to Mr. E. J. Zielbauer of that organization for cooperation\nwith instrument siting, site visits after the earthquake, and for providing maps and\ninformation on the site and the dam.\nWe wish to thank Professors C. Allen and B. Kamb of the California Institute of Technology\nfor permission to reproduce their data in Figures I and 2.\nSpecial thanks are due to Engineering Mechanics Division of the National Science Foundation\nfor their very prompt action after the earthquake in making support available to carry out data\nprocessing of the unprecedented body of strong-motion accelerograms. This research was also\nsupported in part by the National Science Foundation Grant GA 22709 to the Lamont-Doherty\nGeological Observatory of Columbia University.\n\nPublished - 1393.TRIFUNAC.full.pdf
", "abstract": "Integrated ground velocities and displacements calculated from the accelerogram recorded at the Pacoima dam site indicate that the strong ground motion was predominately in the vertical and NS direction, in general agreement with the mechanism of faulting as inferred from aftershock studies, and with fault displacements observed in the field. High-frequency peak accelerations of 1.25 g were recorded in two horizontal directions, these being the highest ground accelerations so far recorded for earthquakes. Response spectrum curves calculated from the accelerograms do not show unusual features, and the numerical values are consistent with past experience. The high-frequency, high-amplitude impulsive ground motion associated with the highest peak accelerations did not contribute significantly to the over-all response spectrum values. The presence of the high-frequency motions in the recorded accelerograms is presumably the consequence of the proximity of the recording site to the fault dislocation.", "date": "1971-10", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "61", "number": "5", "publisher": "Seismological Society of America", "pagerange": "1393-1411", "id_number": "CaltechAUTHORS:20140915-125446485", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140915-125446485", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "GA 22709" } ] }, "primary_object": { "basename": "1393.TRIFUNAC.full.pdf", "url": "https://authors.library.caltech.edu/records/svmj1-svv10/files/1393.TRIFUNAC.full.pdf" }, "resource_type": "article", "pub_year": "1971", "author_list": "Trifunac, M. D. and Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xejd5-yhm51", "eprint_id": 26522, "eprint_status": "archive", "datestamp": "2023-08-19 07:22:14", "lastmod": "2023-10-24 16:22:20", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Strong-Motion Instrumental data on the San Fernando Earthquake of Feb. 9, 1971", "ispublished": "unpub", "full_text_status": "public", "abstract": "The San Fernando Earthquake of February 9, 1971 occurred virtually at the center of the Southern California strong-motion earthquake instrumentation network, and provided an unprecedented amount of valuable data on strong earthquake -generated ground motions, This data will be of key significance in interpreting the severe damage to many modern engineering structures which occurred, and marks a major development in the field of earthquake engineering.\nIt was evident immediately after the event that the problems of recovering field records, of processing the information, and of disseminating the results as quickly and as widely as possible would severely tax the available resources. Fortunately, the close cooperation which had been built up over the years between the Seismological Field Survey of the U. S. Department of Commerce and the Earthquake Engineering Research Laboratory of the California Institute of Technology provided an operating group which could be quickly expanded to meet the challenge.\nIn the days and weeks following the earthquake, each of these organizations issued numerous preliminary reports aimed at the quickest possible distribution of information. The present report up-dates and brings together a number of these initial releases, along with much new material. It is hoped that in this way a more complete picture of the overall instrumentation results can be presented in one convenient place. The report also makes available for the first time a complete description of the Southern California networks, and a\ndetailed account of the performance of these networks during the earthquake,\nA notable feature of the present report is the reproduction in accurate scale form of the complete set of seismoscope records obtained during the earthquake. These seismoscope records offer an unparalleled picture of the complexity of the pattern of ground shaking throughout the Southern California region.\nThe primary purpose of the present compilation is to make available the basic data itself, and no attempt has been made to add interpretive material. Many interpretive studies have, of course, already been made, and the full exploitation of this basic data to increase our knowledge of earthquake engineering will no doubt go on for a number of years.\nIn reporting the accelerograph measurements, numerous examples of accelerograms have been given, and samples of standard data processing procedures leading to digitized print-outs and calculated velocity and displacement curves, and response spectrum curves, have been included. The complete set of accelerograms in computer -plotted form, along with the digital print-outs, are being issued by the Earthquake Engineering Research Laboratory of the California Institute of Technology as a part of the series \"Strong-Motion Earthquake Accelerograms - Digitized and Plotted Data.\" The first volume devoted to the San Fernando earthquake has already been issued as Vol. 1, part C, Report No. EERL 71-20. These volumes of digitized accelerograms will be followed during the next year by additional volumes containing integrated ground velocity and displacement curves, and response spectrum curves, which will be prepared for all of the records obtained during the San Fernando earthquake.\nThe existence of this unusually complete ground motion data is a tribute to the cooperative efforts of a large number of people over a period of many years. Many of the individuals involved have been named in the acknowledgements included in the separate sections. Hundreds of individual accelerograph and seismoscope owners have pooled their resources to make the Southern California region the best instrumented area in the world for strong earthquake ground motion investigations. A complete list of organizations, building owners, and others who deserve thanks for making possible the acquisition and the operation of the instruments would be an imposing indication of the extent of the cooperative effort involved. Special mention should be -made of the very important contributions of the late John C. Monning, former general manager and superintendent of the Department of Building and Safety of the City of Los Angeles. It was Mr, Monning's vision and foresight, implemented with great energy and patience, which resulted in the code requirements for accelerographs in tall buildings which made this earthquake the most extensive structural dynamic test of full-scale buildings ever carried out. His colleagues and successors in the Department of Building and Safety have carried this work forward in a very effective manner, and have thus played a key role in the development of the accelerograph network.", "date": "1971-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1971.EERL.1971.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1971.EERL.1971.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1971.pdf", "url": "https://authors.library.caltech.edu/records/xejd5-yhm51/files/Hudson_1971.pdf" }, "resource_type": "monograph", "pub_year": "1971", "author_list": "Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9bahd-ces85", "eprint_id": 49486, "eprint_status": "archive", "datestamp": "2023-08-19 07:17:20", "lastmod": "2023-10-17 21:28:39", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "Borrego Mountain Earthquake of April 8, 1968 [Book Review]", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1970 Seismological Society of America.\n\nBook review of: \"Borrego Mountain Earthquake of April 8, 1968,\" by T. Leslie Youd and Robert O. Castle,\nJournal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of\nCivil Engineers, vol. 96, no. SM 4, July 1970.\n\nPublished - 2091.2.full.pdf
", "abstract": "This earthquake is of special importance for both geologists and engineers because of the\nunusually large and complex nature of the tectonic surface ruptures, and because of the possibility that ground shaking associated with this relatively small earthquake might have triggered\nsmall motions on distant faults. This paper by two U. S. Geological Survey investigators summarizes\nthe effects of the earthquake on terrain and structures, with special emphasis on slope\nfailures, shattered desert crusts, and seismic compaction.", "date": "1970-12", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "60", "number": "6", "publisher": "Seismological Society of America", "pagerange": "2091-2092", "id_number": "CaltechAUTHORS:20140909-093449625", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140909-093449625", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "2091.2.full.pdf", "url": "https://authors.library.caltech.edu/records/9bahd-ces85/files/2091.2.full.pdf" }, "resource_type": "article", "pub_year": "1970", "author_list": "Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gzyb1-vh026", "eprint_id": 48487, "eprint_status": "archive", "datestamp": "2023-08-19 07:07:32", "lastmod": "2023-10-17 19:23:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trifunac-M-D", "name": { "family": "Trifunac", "given": "M. D." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "Analysis of the Station No. 2 seismoscope record\u20141966, Parkfield, California, earthquake", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1970, by the Seismological Society of America. \n\nManuscript received September 1, 1969. \n\nThanks are expressed to the California State Department of Water Resources and the U. S.\nCoast and Geodetic Survey for making available the data on the Parkfield earthquake. We are\nindebted to David P. Hentchel for assistance in data processing. The work was carried out under a\ngrant from the Engineering Division of the National Science Foundation.\n\nPublished - 785.full.pdf
", "abstract": "During the 1966 Parkfield, California, earthquake a strong motion accelerograph and an adjacent seismoscope were located essentially at the causative fault. The accelerograph component parallel to the fault malfunctioned and left no recorded trace. The seismoscope record and the component of the ground motion perpendicular to the fault are used to reconstruct the acceleration component in the direction parallel to the fault. The details of the derived acceleration parallel to the fault differ from the past recorded strong ground motions in that higher frequency components are present. The peak ground accelerations transverse and along the fault are found to be of the same order of magnitude.", "date": "1970-06", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "60", "number": "3", "publisher": "Seismological Society of America", "pagerange": "785-794", "id_number": "CaltechAUTHORS:20140813-092005891", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140813-092005891", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" } ] }, "primary_object": { "basename": "785.full.pdf", "url": "https://authors.library.caltech.edu/records/gzyb1-vh026/files/785.full.pdf" }, "resource_type": "article", "pub_year": "1970", "author_list": "Trifunac, M. D. and Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vjcq4-xwr62", "eprint_id": 26271, "eprint_status": "archive", "datestamp": "2023-08-19 06:58:00", "lastmod": "2023-10-24 16:15:54", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trifunac-M-D", "name": { "family": "Trifunac", "given": "Mihailo D." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Laboratory evaluations and instrument corrections of strong-motion accelerograms", "ispublished": "unpub", "full_text_status": "public", "abstract": "Since the first strong-motion accelerographs for the measurement of the ground motion associated with destructive earthquakes appeared in the early 1930's there has been a continual development of instruments and data handling techniques. These developments have resulted in improved field reliability, increased frequency response range, better resolution and accuracy, and reduced costs. As new instrument types appear it is necessary to carry out comprehensive programs of laboratory and field evaluation to ensure adequate performance capabilities.\n\nThe advent of high speed digital computer systems has completely altered data processing procedures associated with strongmotion instrumentation. Modern digitization and digital filtering techniques, for example, have made it possible to use new approaches to transducer design, and to the optimal retrieval of information from instrument records.\n\nThe Earthquake Engineering Research Laboratory of the California Institute of Technology considers the continued reliable operation, expansion, and data processing functions of a network of strong-motion accelerographs to be one of the key requirements of earthquake engineering research. To this end, this laboratory has for many years conducted numerous studies and research programs aimed at improvements in all aspects of this subject. In cooperation with the Seismological Field Survey of the U. S. Coast and Geodetic Survey, the Caltech group has been engaged in accelerograph design, testing, network design and installation, accelerogram digitizing and corrections, and the use of accelerograms for structural response determinations.\n\nThe present report brings together a number of special studies related to accelerograph evaluations and data processing, which may be of interest to others engaged in instrument development or in the use of accelerograph records. It is our feeling that the best use can be made of the basic data only by those persons thoroughly familiar with the details of instrument design, and the special problems that may be associated with both the basic measurements themselves and with the handling and interpretation of the data. Some repetition of test method descriptions has been retained to ensure a reasonable independence of the various sections.", "date": "1970-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1970.EERL-70-04", "official_url": "https://resolver.caltech.edu/CaltechEERL:1970.EERL-70-04", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "eerl7004.pdf", "url": "https://authors.library.caltech.edu/records/vjcq4-xwr62/files/eerl7004.pdf" }, "resource_type": "monograph", "pub_year": "1970", "author_list": "Trifunac, Mihailo D. and Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/th47d-ncr97", "eprint_id": 49853, "eprint_status": "archive", "datestamp": "2023-08-19 06:03:25", "lastmod": "2023-10-17 22:15:58", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "The Prince William Sound, Alaska, earthquake of 1964 and aftershocks [Book Review]", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1968 Seismological Society of America.\n\nBook review of: The Prince William Sound, Alaska, Earthquake of 1964 and Aftershocks, in 3 vol., Fergus J.\nWood, Editor-in-Chief. Volume II, part A: Engineering Seismology, U. S. Department of\nCommerce, Environmental Science Services Administration, Coast and Geodetic Survey,\nU. S. Government Printing Office, Washington, 1967; 392 pages; map and phonograph\nrecord.\n\nPublished - 747.2.full.pdf
", "abstract": "This second part of the comprehensive report on the Alaskan earthquake being issued by\nthe U. S. Coast and Geodetic Survey was prepared by practicing engineers for the structural\nengineering profession. The papers have been assembled by Karl V. Steinbrugge, who has\ncontributed an introduction giving a concise summary of background information on the earthquake\nengineering aspects of the earthquake.", "date": "1968-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "58", "number": "2", "publisher": "Seismological Society of America", "pagerange": "747-748", "id_number": "CaltechAUTHORS:20140919-102404477", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140919-102404477", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "747.2.full.pdf", "url": "https://authors.library.caltech.edu/records/th47d-ncr97/files/747.2.full.pdf" }, "resource_type": "article", "pub_year": "1968", "author_list": "Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/fr8yg-j4j85", "eprint_id": 47782, "eprint_status": "archive", "datestamp": "2023-08-19 04:57:16", "lastmod": "2023-10-26 21:14:12", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } }, { "id": "Scott-R-F", "name": { "family": "Scott", "given": "Ronald F." } } ] }, "title": "Fault motions at the Baldwin Hills Reservoir site", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1965, by the Seismological Society of America. \n\nManuscript received September 16, 1964. \n\nAs members of the Board of Inquiry appointed by the Mayor of the City of Los Angeles to\ninvestigate the failure of the Baldwin Hills Reservoir, the authors enjoyed the fullest cooperation\nof all members of the Department of Water and Power. The opinions expressed in this\npaper, however, are those of the authors. In particular, we would like to thank Mr. R. R. Wilson,\nMr. H. B. Hemborg, and Mr. W. J. Simon of the Department of Water and Power, for assistance\nin the collection of data. Dr. Frank Press of the Seismological Laboratory of the California\nInstitute of Technology made available the portable seismograph for the Baldwin Hills site,\nas well as the seismological records of past earthquakes. Thanks are expressed also to Professor\nC. F. Richter of the Seismological Laboratory and Professor C. R. Allen of the Division of\nGeological Sciences, California Institute of Technology, who made valuable suggestions on\nseismological and geological matters, and to Mr. J. M. Nordquist of the Seismological Laboratory\nfor assistance with the seismicity map.\n\nPublished - 165.full.pdf
", "abstract": "A distinction is made between the damaging potential of rapid fault motions associated with earthquakes and those having a relatively slow creep type motion. Information is given on nonseismic movements that have been occurring on faults passing through the Baldwin Hills Reservoir during the past 10 years. The relationship between those faults and the Inglewood fault system is described, and correlations are presented with local elevation changes, horizontal ground movements, and seismic activity. Comparisons are made with similar slow fault motions occurring at other places in California, and attention is drawn to the potential damaging effects of such movements.", "date": "1965-02", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "55", "number": "1", "publisher": "Seismological Society of America", "pagerange": "165-180", "id_number": "CaltechAUTHORS:20140801-103703325", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-103703325", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "165.full.pdf", "url": "https://authors.library.caltech.edu/records/fr8yg-j4j85/files/165.full.pdf" }, "resource_type": "article", "pub_year": "1965", "author_list": "Hudson, Donald E. and Scott, Ronald F." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yq07j-q6b75", "eprint_id": 47798, "eprint_status": "archive", "datestamp": "2023-08-19 04:38:54", "lastmod": "2023-10-26 21:14:50", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } }, { "id": "Keightley-W-O", "name": { "family": "Keightley", "given": "W. O." } }, { "id": "Nielsen-N-N", "name": { "family": "Nielsen", "given": "N. N." } } ] }, "title": "A new method for the measurement of the natural periods of buildings", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1964, by the Seismological Society of America. \n\nManuscript received July 15, 1963. \n\nThanks are expressed to William K. Cloud, Chief of the Seismological Field Survey, United\nStates Coast and Geodetic Survey, for assistance with the period measurements of the Encino\nTower, which was made available for testing through the cooperation of the Los Angeles\nDepartment of Water & Power. We also wish to thank Francis E. Lehner of the Seismological\nLaboratory, California Institute of Technology, whose assistance made possible the adaptation\nof the lunar seismograph to this investigation, and Professor C. F. Richter of the Seismological Laboratory for information on the 28 February 1963 earthquake.\n\nPublished - 233.full.pdf
", "abstract": "It is shown that the inertia force obtained by a man moving his body back and forth in synchronism with the natural period of vibration of a large structure is sufficient to build up a measurable amplitude of motion. By recording such structural vibrations versus time, the natural period and damping of several of the lower modes of vibration can be determined. The amplitudes of motion set up in this way are for many structures significantly larger than can be obtained from wind excitation, which has been used in the past for the measurement of the period of the fundamental mode.", "date": "1964-02", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "54", "number": "1", "publisher": "Seismological Society of America", "pagerange": "233-241", "id_number": "CaltechAUTHORS:20140801-111018702", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-111018702", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "233.full.pdf", "url": "https://authors.library.caltech.edu/records/yq07j-q6b75/files/233.full.pdf" }, "resource_type": "article", "pub_year": "1964", "author_list": "Hudson, D. E.; Keightley, W. O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/f2zxt-43d03", "eprint_id": 47807, "eprint_status": "archive", "datestamp": "2023-08-19 04:18:53", "lastmod": "2023-10-26 21:15:11", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "The measurement of ground motion of destructive earthquakes", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1963, by the Seismological Society of America. \n\nManuscript received April 12, 1962. \n\nThanks are expressed to Mr. W. K. Cloud, Chief of the Seismological Field Survey of the\nUnited States Coast and Geodetic Survey for information on the U.S.C.G.S. Accelerograph\nand for the data on field tests of the U.S.C.G.S. Seismoscope. Drs. N. Nasu, R. Takahasi,\nand K. Kanai of the Earthquake Research Institute of the University of Tokyo, and Mr. M.\nSaito of Akashi Seisakusho Ltd., kindly supplied information on the Japanese strong-motion\naccelerographs and instrumentation program.\n\nPublished - 419.full.pdf
", "abstract": "The need for a greatly expanded network of strong-motion accelerographs throughout the seismic regions of the world is stressed. A summary of the characteristics of currently available strong-motion accelerographs is presented, and the design details are given for an instrument suitable for acquiring the basic data needed by structural engineers for earthquake resistant design. It is shown that for such an instrument, the natural period must be less than 0.1 seconds, and that the recording speed must be at least 1 cm/sec. The critical nature of the inertia starting device is discussed, and some information is given on the transient response of the standard pendulum starter used in the United States Coast and Geodetic Survey Strong-Motion Accelerograph. The use of simpler, non-time-recording instruments such as the U.S.C.G.S. Seismoscope to supplement the accelerograph network is described.", "date": "1963-02", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "53", "number": "2", "publisher": "Seismological Society of America", "pagerange": "419-437", "id_number": "CaltechAUTHORS:20140801-115554273", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-115554273", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "419.full.pdf", "url": "https://authors.library.caltech.edu/records/f2zxt-43d03/files/419.full.pdf" }, "resource_type": "article", "pub_year": "1963", "author_list": "Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tjyrx-xvm25", "eprint_id": 47804, "eprint_status": "archive", "datestamp": "2023-08-19 04:03:51", "lastmod": "2023-10-26 21:15:03", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Merchant-H-C", "name": { "family": "Merchant", "given": "H. C." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "Mode superposition in multi-degree of freedom systems using earthquake response spectrum data", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1962, by the Seismological Society of America. \n\nManuscript received September 8. 1961. \n\nThanks are expressed to Professor G. W. Housner and T. K. Caughey of the Division of\nEngineering, California Institute of Technology, for their contributions to this investigation.\n\nPublished - 405.full.pdf
", "abstract": "Dynamic responses of a series of typical three-degree of freedom structures to strong-motion earthquake excitation were calculated by analog computer techniques and were compared with approximate responses obtained by a superposition of individual modes derived from response spectrum curves. The results indicate that a suitably weighted average of the sum of the absolute values of the individual modes and the square root of the sum of the squares of the modes will give a practical design criterion for the base shear forces in multi-story buildings. For critical designs, this weighted average reduces to the absolute sum of the modes, which is found to be close to the true value for a significantly high proportion of typical earthquake-structure combinations.", "date": "1962-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "52", "number": "2", "publisher": "Seismological Society of America", "pagerange": "405-416", "id_number": "CaltechAUTHORS:20140801-113026550", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-113026550", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "405.full.pdf", "url": "https://authors.library.caltech.edu/records/tjyrx-xvm25/files/405.full.pdf" }, "resource_type": "article", "pub_year": "1962", "author_list": "Merchant, H. C. and Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rm7vx-jh625", "eprint_id": 47806, "eprint_status": "archive", "datestamp": "2023-08-19 04:03:56", "lastmod": "2023-10-26 21:15:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "Some problems in the application of spectrum techniques to strong-motion earthquake analysis", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1962, by the Seismological Society of America. \n\nManuscript received September 8, 1961. \n\nThanks are expressed to W. D. Iwan and M. E. J. O'Kelly for preparing the digital data and\nthe computer program, and for carrying out the computations for the response spectrum comparisons\nand for the digital Fourier spectrum determinations. The computations and studies\nof the displacement and velocity response spectra were made by Mr. A. R. Chandrasekaran of the Department of Civil Engineering, University of Roorkee, India, to whom thanks are also\nexpressed. Professor Glen V. Berg of the Department of Civil Engineering, University of\nMichigan, made available his digital data and computed Response Spectrum results, and\ncontributed useful comments and suggestions which are much appreciated. The studies were\nsupported in part by a grant from the National Science Foundation through the Engineering\nSciences Division.\n\nPublished - 417.full.pdf
", "abstract": "A comparison of analog and digital computation of strong-motion earthquake response spectra is made, and it is shown that the preference as to method will depend mainly on availability of computing equipment. The accuracy of analog response spectrum computations is shown to be compatible with the limitations of the original ground acceleration data. The accuracy of the customary approximate relationship between the displacement response spectrum and the velocity response spectrum is investigated, and the validity of the simplifications are shown for typical strong-motion earthquake applications. The relationship between the response spectrum and the Fourier spectrum is developed, and a comparison as to suitability for earth-quake engineering problems is given.", "date": "1962-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "52", "number": "2", "publisher": "Seismological Society of America", "pagerange": "417-430", "id_number": "CaltechAUTHORS:20140801-115227186", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-115227186", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" } ] }, "primary_object": { "basename": "417.full.pdf", "url": "https://authors.library.caltech.edu/records/rm7vx-jh625/files/417.full.pdf" }, "resource_type": "article", "pub_year": "1962", "author_list": "Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jcm2f-grz65", "eprint_id": 26490, "eprint_status": "archive", "datestamp": "2023-08-19 04:00:55", "lastmod": "2023-10-24 16:21:11", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Synchronized vibration generators for dynamic tests of full-scale structures", "ispublished": "unpub", "full_text_status": "public", "abstract": "The general considerations behind the design of a rotating\nweight sinusoidal vibration generator for dynamic studies of full-scale structures have been given in a previous report which pointed out the advantages of a system of multiple synchronized machines that would permit a distribution of exciting forces throughout a structure so as to most efficiently excite various modes of vibration.\nUnder the sponsorship of the California State Division of Architecture a set of four synchronized vibration generators has been completed and tested, and the purpose of the present report is to summarize the design information on this new system, and to give detailed operating instructions for its use.", "date": "1962-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1962.EERL.1962.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1962.EERL.1962.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1962.pdf", "url": "https://authors.library.caltech.edu/records/jcm2f-grz65/files/Hudson_1962.pdf" }, "resource_type": "monograph", "pub_year": "1962", "author_list": "Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/39dga-0a616", "eprint_id": 47781, "eprint_status": "archive", "datestamp": "2023-08-19 03:47:59", "lastmod": "2023-10-26 21:14:10", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cloud-W-K", "name": { "family": "Cloud", "given": "W. K." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "A simplified instrument for recording strong motion earthquakes", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1961, by the Seismological Society of America. \n\nManuscript received for publication October 24, 1960, and, as revised, January 13, 1961. \n\nThe design and construction of the prototype seismoscope was carried out by the\nU. S. Coast and Geodetic Survey under the direction of Elliot B. Roberts, Chief, Division of Geophysics. Numerous contributions were made by various members of\nthe Seismological Field Survey Staff, including Richard P. Maley, John Hershberger,\nand Charles F. Knudson. C. Martin Duke and David J. Leeds of the University\nof California at Los Angeles made the required studies on seismoscope location.\nMany useful suggestions for production of the field model were made by J. J,\nWilmot of Wilmot Engraving and Instrument Company. Wilfred D. Iwan of the\nDivision of Engineering, California Institute of Technology, conducted the laboratory\ntests of the field model. Thanks are expressed to the National Science Foundation\nfor a grant through the Engineering Sciences Division, which was administered\nfor the California Institute of Technology by G. W. Housner and D. E. Hudson.\n\nPublished - 159.full.pdf
", "abstract": "A strong-motion earthquake recorder for the direct measurement of one point on the response spectrum curve is described, and results obtained with the instrument under field conditions are compared with those obtained by a standard spectrum analysis of accelerograph records. The device has the advantages of low initial cost and of low maintenance expense, and can thus be installed in relatively large numbers. A network of such instruments located at points having various local geological conditions is proposed as a supplement to the U. S. Coast and Geodetic Survey strong-motion seismograph system.", "date": "1961-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "51", "number": "2", "publisher": "Seismological Society of America", "pagerange": "159-174", "id_number": "CaltechAUTHORS:20140801-103308350", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-103308350", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" } ] }, "primary_object": { "basename": "159.full.pdf", "url": "https://authors.library.caltech.edu/records/39dga-0a616/files/159.full.pdf" }, "resource_type": "article", "pub_year": "1961", "author_list": "Cloud, W. K. and Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/b98cm-yr884", "eprint_id": 47792, "eprint_status": "archive", "datestamp": "2023-08-19 03:48:08", "lastmod": "2023-10-26 21:14:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } }, { "id": "Alford-J-L", "name": { "family": "Alford", "given": "J. L." } }, { "id": "Iwan-W-D", "name": { "family": "Iwan", "given": "W. D." } } ] }, "title": "Ground accelerations caused by large quarry blasts", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1961, by the Seismological Society of America. \n\nManuscript received for publication September 1, 1960. \n\nWe are grateful to the Minnesota Mining and Manufacturing Company for\ntheir interest and cooperation which made these tests possible. Mr. R. E. Gundlach,\nregional manager, and Mr. G. J. LaVenture, production superintendent of\nthe Corona quarry were most helpful throughout the project. Thanks are due Mr.\nW. K. Cloud and the United States Coast and Geodetic Survey for their cooperation,\nand to Mr. Jerry Morrill and Mr. Richard Maley of the U.S.C.G.S. for their\nassistance with the instrumentation. We should also like to express our appreciation\nto the National Science Foundation for their support through a research grant\nadministered by their Engineering Sciences Division, which has contributed to\nthe analysis of the data reported above.\n\nPublished - 191.full.pdf
", "abstract": "Ground acceleration-time measurements have been made within 2000 ft. of two quarry blasts of total charge weight 185 tons and 673 tons. Ground accelerations were of a character and magnitude similar to those associated with damaging earthquakes. Complete response spectrum curves calculated from the acceleration records are presented. Direct comparisons are made between these results and previous similar measurements and calculations using identical instruments, which have been made of strong-motion earthquakes, H. E. blasts, and the Rainier nuclear blast.", "date": "1961-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "51", "number": "2", "publisher": "Seismological Society of America", "pagerange": "191-202", "id_number": "CaltechAUTHORS:20140801-105616751", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-105616751", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF" } ] }, "primary_object": { "basename": "191.full.pdf", "url": "https://authors.library.caltech.edu/records/b98cm-yr884/files/191.full.pdf" }, "resource_type": "article", "pub_year": "1961", "author_list": "Hudson, D. E.; Alford, J. L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pr8dt-30053", "eprint_id": 26489, "eprint_status": "archive", "datestamp": "2023-08-19 03:43:18", "lastmod": "2023-10-24 16:21:09", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "A New vibration exciter for dynamic tests of full scale structures", "ispublished": "unpub", "full_text_status": "public", "abstract": "Design criteria are established for a vibration exciter unit suitable for steady-state resonance tests of full-scale building structures, and several design configurations are compared. These ideas are embodied in the design of a new unit, which produces a horizontal, uni-directional sinusoidally varying force of about 1000 lb magnitude at I cycle per second, with a maximum force limit of 5000 lb. The total weight of the machine with its maximum load of eccentric weights is about 1500 lb, which can be broken down into units not exceeding 580 lb for handling and transportation. The general features of a servocontrolled electronic amplidyne speed control and D. C. drive for the vibration exciter are given. A field test of the new vibration exciter system is described, and typical results of the determination of the dynamic properties of a concrete intake tower of a dam by means of the new machine are given.", "date": "1961-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1961.EERL.1961.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1961.EERL.1961.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1961.pdf", "url": "https://authors.library.caltech.edu/records/pr8dt-30053/files/Hudson_1961.pdf" }, "resource_type": "monograph", "pub_year": "1961", "author_list": "Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/qqfbb-9p249", "eprint_id": 26494, "eprint_status": "archive", "datestamp": "2023-08-19 03:43:29", "lastmod": "2023-10-24 16:21:20", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Keightley-W-O", "name": { "family": "Keightley", "given": "W. O." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "George W." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "Vibration tests of the Encino Dam intake tower", "ispublished": "unpub", "full_text_status": "public", "abstract": "The need for dynamic tests of full size structures has been realized for many years. The only way in which the parameters of major interest in structural dynamics problems, such as effective dynamic spring constants, energy dissipation characteristics, etc., can be determined, is by tests of actual structures under relatively high loading conditions. Such tests have very seldom been possible because of (1) the difficulty of applying dynamic loads of the required type and magnitude; (2) the difficulty of making the required measurements of dynamic structural responses; and (3) the unavailability of suitable test structures which could be loaded to the point of significant damage.", "date": "1961-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1961.EERL.1961.003", "official_url": "https://resolver.caltech.edu/CaltechEERL:1961.EERL.1961.003", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Keightley_1961.pdf", "url": "https://authors.library.caltech.edu/records/qqfbb-9p249/files/Keightley_1961.pdf" }, "resource_type": "monograph", "pub_year": "1961", "author_list": "Keightley, W. O.; Housner, George W.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2c43q-6zd81", "eprint_id": 26479, "eprint_status": "archive", "datestamp": "2023-08-19 03:25:37", "lastmod": "2023-10-24 16:20:48", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Caughey-T-K", "name": { "family": "Caughey", "given": "Thomas Kirk" } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } }, { "id": "Powell-R-V", "name": { "family": "Powell", "given": "R. V." } } ] }, "title": "The C.I.T. Mark II electric analog type response spectrum analyzer for earthquake excitation studies", "ispublished": "unpub", "full_text_status": "public", "note": "revision of a report originally issued in 1954, and deposited in this archive", "abstract": "The design of a response spectrum analyzer for earthquake excitation studies is described. Electric analog techniques are used, with a series inductance, capacitance, and resistance circuit forming a direct analog to the mechanical structure. The circuit arrangement permits a determination of system response for a sequence of periods at constant damping. Provision is made for obtaining zero damping in the circuit. An arbitrary function generator of the variable width film-photoelectric cell type is described. The results obtained with the function generator-spectrum analyzer system for a half-sine wave pulse are compared with the mathematically obtained exact answers for the zero damping case, and the accuracy of the system is shown to be satisfactory.\n\nThis is a revision of a report originally issued as the \"Sixth Technical Report\", Office of Naval Research Contract N6 ONR-244, Task Order 25, Project Designation NR-081-095 by the California Institute of Technology dated July, 1954. The new model spectrum analyzer herein described has superseded the model discussed in this preceding report.", "date": "1960-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1960.EERL.1960.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1960.EERL.1960.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Caughey_tk_1960.pdf", "url": "https://authors.library.caltech.edu/records/2c43q-6zd81/files/Caughey_tk_1960.pdf" }, "resource_type": "monograph", "pub_year": "1960", "author_list": "Caughey, Thomas Kirk; Hudson, Donald E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4vv2s-77b07", "eprint_id": 26488, "eprint_status": "archive", "datestamp": "2023-08-19 03:25:42", "lastmod": "2023-10-24 16:21:07", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } }, { "id": "Iwan-W-D", "name": { "family": "Iwan", "given": "Wilfred D." } } ] }, "title": "The Wilmot survey type strong-motion earthquake recorder (The U.S.C.G.S. Seismoscope) part II", "ispublished": "unpub", "full_text_status": "public", "abstract": "The results of laboratory tests on the adjustment, accuracy, and performance of the seismoscope are given. The effects of stylus pressure, record plate curvature, method of adjustment, and other factors on the damping characteristics of the pendulum were experimentally investigated, and the results are embodied in recommendations for a standard procedure for the field installation and checking of the instrument. The accuracies of such basic instrument parameters as period and tilt sensitivity were established, and the overall level of duplicability of results attained by typical instruments was determined. A comparison of the behavior of similar instruments made by different manufacturers was made. The results of field tests involving the measurement of actual ground motions caused by blasts and earthquakes are given. The location of some 50 of the Wilmot seismoscopes in a network covering the Los Angeles area is given, together with available information as to local geology and soil conditions at the seismoscope sites.", "date": "1960-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1960.EERL.1960.002", "official_url": "https://resolver.caltech.edu/CaltechEERL:1960.EERL.1960.002", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1960.pdf", "url": "https://authors.library.caltech.edu/records/4vv2s-77b07/files/Hudson_1960.pdf" }, "resource_type": "monograph", "pub_year": "1960", "author_list": "Hudson, Donald E. and Iwan, Wilfred D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zkjrd-pq054", "eprint_id": 48097, "eprint_status": "archive", "datestamp": "2023-08-19 03:07:01", "lastmod": "2023-10-17 15:50:53", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "G. W." } } ] }, "title": "An analysis of strong-motion accelerometer data from the San Francisco earthquake of March 22, 1957", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1958, by the Seismological Society of America. \n\nManuscript received for publication January 6, 1958.\n\nPublished - 253.full.pdf
", "abstract": "The San Francisco earthquake of March 22, 1957, was recorded simultaneously by accelerometers\nat five United States Coast and Geodetic Survey stations in the San Francisco area. Response\nspectrum curves were computed from the acceleration-time records, and from these response\nspectrum curves the spectrum intensities have been determined. From these spectrum intensities\ncertain conclusions are drawn as to: (1) the effects of local geology on the recorded ground motions;\n(2) the calculation of total energy released by the earthquake from strong-motion accelerometer\nrecords; (3) possible influence of structural dynamic behavior on the accelerations recorded in\nbuilding basements, and the relationship between basement accelerations and ground accelerations;\nand (4) the applicability of a simplified type of strong-motion earthquake instrument for\ninvestigations of local distribution effects. A general comparison is made between the present\nearthquake and typical Pacific Coast earthquakes.", "date": "1958-07", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "48", "number": "3", "publisher": "Seismological Society of America", "pagerange": "253-268", "id_number": "CaltechAUTHORS:20140806-124217743", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140806-124217743", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "253.full.pdf", "url": "https://authors.library.caltech.edu/records/zkjrd-pq054/files/253.full.pdf" }, "resource_type": "article", "pub_year": "1958", "author_list": "Hudson, D. E. and Housner, G. W." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/83mtp-kty91", "eprint_id": 48081, "eprint_status": "archive", "datestamp": "2023-08-19 03:04:26", "lastmod": "2023-10-17 15:50:17", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Housner-G-W", "name": { "family": "Housner", "given": "G. W." } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "D. E." } } ] }, "title": "The Port Hueneme earthquake of March 18, 1957", "ispublished": "pub", "full_text_status": "public", "note": "Copyright \u00a9 1958, by the Seismological Society of America. \n\nManuscript received for publication January 6, 1958.\n\nPublished - 163.full.pdf
", "abstract": "The Port Hueneme earthquake of March 18, 1957, was the first recorded strong-motion earthquake for which the ground motion consisted essentially of a single pulse. Since all the energy of the earthquake was concentrated in one pulse, the ground accelerations and the response spectrum values were considerably larger than for more typical Pacific Coast earthquakes of equivalent magnitude. These abnormally high values are reflected in damage reports, which indicated an unusual amount of damage for a shock of magnitude 4.7.", "date": "1958-04", "date_type": "published", "publication": "Bulletin of the Seismological Society of America", "volume": "48", "number": "2", "publisher": "Seismological Society of America", "pagerange": "163-168", "id_number": "CaltechAUTHORS:20140806-115118490", "issn": "0037-1106", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140806-115118490", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "163.full.pdf", "url": "https://authors.library.caltech.edu/records/83mtp-kty91/files/163.full.pdf" }, "resource_type": "article", "pub_year": "1958", "author_list": "Housner, G. W. and Hudson, D. E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jjbxm-0p429", "eprint_id": 26487, "eprint_status": "archive", "datestamp": "2023-08-19 03:03:46", "lastmod": "2023-10-24 16:21:05", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "The Wilmot survey type strong-motion earthquake recorder", "ispublished": "unpub", "full_text_status": "public", "abstract": "A simplified instrument for the direct measurement of one point on the response spectrum of the ground motion caused by strong-motion earthquakes is described, and the theory of operation is developed. Determinations of the physical characteristics of two test instruments of a standardized design suitable for large scale production and installation are discussed. Direct comparisons between the instrument results and the spectrum analysis of base accelerations are given, and the conclusion is reached that the device in its present form is suitable for the contemplated application to strong-motion earthquake measurement.", "date": "1958-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1958.EERL.1958.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1958.EERL.1958.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1958.pdf", "url": "https://authors.library.caltech.edu/records/jjbxm-0p429/files/Hudson_1958.pdf" }, "resource_type": "monograph", "pub_year": "1958", "author_list": "Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jqhv8-1k842", "eprint_id": 26478, "eprint_status": "archive", "datestamp": "2023-08-19 02:20:37", "lastmod": "2023-10-24 16:20:46", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Caughey-T-K", "name": { "family": "Caughey", "given": "Thomas Kirk" } }, { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } } ] }, "title": "An electric analog type response spectrum analyzer for earthquake excitation studies", "ispublished": "unpub", "full_text_status": "public", "abstract": "The design of a response spectrum analyzer for earthquake excitation studies is described. Electric analog techniques are used, with a series inductance, capacitance, and resistance circuit forming a direct analog to the mechanical structure. The circuit arrangement permits a determination of system response for a sequence of periods at constant damping. Provision is made for obtaining zero damping in the circuit. An arbitrary function generator of the variable width film photoelectric cell type is described. The results obtained with the function generator- spectrum analyzer system for a half-sine wave pulse are compared with the mathematically obtained exact answers for the zero damping case, and the accuracy of the system is shown to be satisfactory.", "date": "1954-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1954.EERL.1954.002", "official_url": "https://resolver.caltech.edu/CaltechEERL:1954.EERL.1954.002", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Caughey_tk_1954.pdf", "url": "https://authors.library.caltech.edu/records/jqhv8-1k842/files/Caughey_tk_1954.pdf" }, "resource_type": "monograph", "pub_year": "1954", "author_list": "Caughey, Thomas Kirk and Hudson, Donald E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pkjrf-f9694", "eprint_id": 26486, "eprint_status": "archive", "datestamp": "2023-08-19 02:20:41", "lastmod": "2023-10-24 16:21:03", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "George W." } } ] }, "title": "Vibration tests of a steel-frame building", "ispublished": "unpub", "full_text_status": "public", "abstract": "The natural frequency and damping of a steel-frame building were experimentally determined for the first two modes of vibration from a steady state resonance curve obtained with a variable frequency mechanical oscillator. The value of the first natural frequency was 3.5 cps, which may be compared with the 2.9 cps frequency which was determined from calculations of the response to the transient excitation of a quarry blast. The difference in these frequencies is explained by the fact that somewhat different modes of vibration were excited by the two tests, and by possible differences in structural damping at the high and low amplitude levels of the two tests. The maximum accelerations set up during the steady state tests were of the order of 0.005 g., whereas the accelerations during the blast reached values around 0.1 g. The damping measured for the low amplitude steady state vibrations was 3.416 of critical damping.", "date": "1954-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1954.EERL.1954.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1954.EERL.1954.001", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1954.pdf", "url": "https://authors.library.caltech.edu/records/pkjrf-f9694/files/Hudson_1954.pdf" }, "resource_type": "monograph", "pub_year": "1954", "author_list": "Hudson, Donald E. and Housner, George W." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jnnv6-67r62", "eprint_id": 26485, "eprint_status": "archive", "datestamp": "2023-08-19 01:57:49", "lastmod": "2023-10-24 16:21:01", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hudson-D-E", "name": { "family": "Hudson", "given": "Donald E." } }, { "id": "Alford-J-L", "name": { "family": "Alford", "given": "Jack L." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "George W." } } ] }, "title": "Response of a structure to an explosive-generated ground shock", "ispublished": "unpub", "full_text_status": "public", "abstract": "Measurements were made of ground accelerations and the resulting building accelerations at a point very near a large quarry blast. It is shown that, in the case of simple buildings, the building acceleration may be calculated with satisfactory accuracy from a knowledge of the ground acceleration.\n\nThe response of the test building to the ground acceleration of a typical strong-motion earthquake was computed, and it was found that the resulting accelerations were in excess of those usually provided for in earthquake-resistant design. It is concluded that the satisfactory performance of well-designed structures during strong earthquakes may have two explanations: first, that vibration energy is dissipated by stresses in excess of the elastic limit, with the result that hidden damage may occur; and second, that ordinary buildings may have sources of strength which are not taken into account in their design.", "date": "1952-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1952.EERL.1952.002", "official_url": "https://resolver.caltech.edu/CaltechEERL:1952.EERL.1952.002", "rights": "You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.", "local_group": { "items": [ { "id": "Earthquake-Engineering-Research-Laboratory" } ] }, "primary_object": { "basename": "Hudson_1952.pdf", "url": "https://authors.library.caltech.edu/records/jnnv6-67r62/files/Hudson_1952.pdf" }, "resource_type": "monograph", "pub_year": "1952", "author_list": "Hudson, Donald E.; Alford, Jack L.; et el." } ]