[ { "id": "https://authors.library.caltech.edu/records/zzpde-3b947", "eprint_id": 46065, "eprint_status": "archive", "datestamp": "2023-08-19 01:52:50", "lastmod": "2023-10-26 18:39:36", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Alford-J-L", "name": { "family": "Alford", "given": "J. L." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "G. W." } }, { "id": "Martel-R-R", "name": { "family": "Martel", "given": "R. R." } } ] }, "title": "Spectrum analysis of strong motion earthquakes", "ispublished": "unpub", "full_text_status": "public", "note": "First technical Report until Office of Naval Research Contract N6onr-244 Task Order 25 Project Designation NR-081-095.\n\nThe authors wish to express their appreciation to the staff of the Analysis Laboratory for making the electric analog computations. Thanks are due Mr. D. A. Hausmann for his help in reducing the data and preparing the figures.\n\n
Submitted - Spectrum_Analysis_of_Strong_Motion_Earthquakes.pdf
", "abstract": "The problem of the dynamic response of a structure to an earthquake has been formulated in a manner which permits separation of the characteristics of particular structures from the characteristics of the earthquake.\nThe expression involving the characteristics of the earthquake is defined as the \"spectrum\" of the earthquake and it is shown that the spectrum is simply a plot of the response of a simple oscillator versus the period of\nthe oscillator. Eighty-eight such spectra were computed by means of an electric analog computer and are presented in this report.\n\nIt is found that damping is a very important parameter in the overall problem; relatively small amounts of damping reduce structural response sharply. It is shown that, when damping is considered, the spectra are consistent with\nthe hypothesis of a distribution about a mean value. It is concluded that the concept of a \"dominant ground period\" is not valid for the purpose of aseismic structural design. Further research on damping in buildings is recommended,\nand it is proposed that the mean value of a damped spectrum be used as a quantitative measure of earthquake intensity.", "date": "2014-06-03", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechAUTHORS:20140603-154739143", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140603-154739143", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Office of Naval Research", "grant_number": "N6onr-244" } ] }, "collection": "CaltechAUTHORS", "primary_object": { "basename": "Spectrum_Analysis_of_Strong_Motion_Earthquakes.pdf", "url": "https://authors.library.caltech.edu/records/zzpde-3b947/files/Spectrum_Analysis_of_Strong_Motion_Earthquakes.pdf" }, "resource_type": "monograph", "pub_year": "2014", "author_list": "Alford, J. L.; Housner, G. W.; et el." }, { "id": "https://authors.library.caltech.edu/records/tmpcp-zhd80", "eprint_id": 12455, "eprint_status": "archive", "datestamp": "2023-08-21 21:30:44", "lastmod": "2023-10-17 16:59:54", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Millikan-R-A", "name": { "family": "Millikan", "given": "Robert A." } }, { "id": "Martel-R-R", "name": { "family": "Martel", "given": "R. R." } }, { "id": "Austin-J-C", "name": { "family": "Austin", "given": "John C." } }, { "id": "Hunt-S", "name": { "family": "Hunt", "given": "Sumner" } }, { "id": "Witmer-D-J", "name": { "family": "Witmer", "given": "David J." } }, { "id": "Hill-R-A", "name": { "family": "Hill", "given": "Raymond A." } }, { "id": "Labarre-R-V", "name": { "family": "Labarre", "given": "R. V." } }, { "id": "Bowen-O-G", "name": { "family": "Bowen", "given": "Oliver G." } }, { "id": "Noice-B", "name": { "family": "Noice", "given": "Blaine" } }, { "id": "Buwalda-J-P", "name": { "family": "Buwalda", "given": "J. P." } }, { "id": "Johnson-H-R", "name": { "family": "Johnson", "given": "Harry R." } }, { "id": "Connolly-P-L", "name": { "family": "Connolly", "given": "P. L." } }, { "id": "Crowell-H-H", "name": { "family": "Crowell", "given": "Harold H." } }, { "id": "Dixon-L-E", "name": { "family": "Dixon", "given": "L. E." } }, { "id": "Reed-R-J", "name": { "family": "Reed", "given": "Ralph J." } }, { "id": "Shield-J-E", "name": { "family": "Shield", "given": "J. E." } }, { "id": "Baskerville-H-H", "name": { "family": "Baskerville", "given": "Harry H." } }, { "id": "Farmer-Z-J", "name": { "family": "Farmer", "given": "Zack J." } }, { "id": "Simpson-Wm-A", "name": { "family": "Simpson", "given": "Wm. A." } } ] }, "title": "Long Beach Earthquake and Protection Against Future Earthquakes -- Summary of Report by Joint Technical Committee on Earthquake Protection, Dr. Robert A. Millikan, Chairman", "ispublished": "unpub", "full_text_status": "public", "keywords": "Long Beach earthquake; building codes", "abstract": "To the Public of the Pacific Southwest: \n\nIn response to official requests from many representative technical and civic organizations, the Joint Technical Committee on Earthquake Protection was organized after the earthquake of March 10, 1933 to consider ways and means of minimizing loss of life and property damage in the event of another earthquake of equal or greater intensity. \n\nWe now present to you, in the form of this summarized report, our belief as to the seismic hazard in this region and our opinion as to the proper balance between the degree of protection to be afforded life and property and the cost of providing such protection. \n\nWe sincerely hope that the lessons of the Long Beach earthquake will not be forgotten as were the lessons which should have been fixed indelibly in the minds of all by the earthquakes of the past. \n\nJoint Technical Committee on Earthquake Protection. \nRobert A. Millikan, Chairman. \n\nJune 7-1933.", "date": "2008-12-01", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:MILlberpt33", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MILlberpt33", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "collection": "CaltechAUTHORS", "corp_creators": { "items": [ "Joint Technical Committee on Earthquake Protection" ] }, "primary_object": { "basename": "MILlberpt33.pdf", "url": "https://authors.library.caltech.edu/records/tmpcp-zhd80/files/MILlberpt33.pdf" }, "resource_type": "monograph", "pub_year": "2008", "author_list": "Millikan, Robert A.; Martel, R. R.; et el." }, { "id": "https://authors.library.caltech.edu/records/p1j25-k5225", "eprint_id": 26476, "eprint_status": "archive", "datestamp": "2023-08-19 04:37:18", "lastmod": "2023-10-24 16:20:42", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Alford-J-L", "name": { "family": "Alford", "given": "Jack L." } }, { "id": "Housner-G-W", "name": { "family": "Housner", "given": "George W." } }, { "id": "Martel-R-R", "name": { "family": "Martel", "given": "R. R." } } ] }, "title": "Spectrum analyses of strong-motion earthquakes", "ispublished": "unpub", "full_text_status": "public", "note": "Report on research conducted under contract with the Office of Naval Research. Originally published August 1951. This is \"revised August 1964\".", "abstract": "The problem of the dynamic response of a structure to an earthquake has been formulated in a manner which permits separation of the characteristics of particular structures from the characteristics of the earthquake. The expression involving the characteristics of the earthquake is defined as the \"spectrum\" of the earthquake and it is shown that the spectrum is simply a plot of the response of a simple oscillator versus the period of the oscillator. Eighty-eight such spectra were computed by means of an electric analog computer and are presented in this report.\n\nIt is found that damping is a very important parameter in the overall problem; relatively small amounts of damping reduce structural response sharply. It is shown that, when damping is considered, the spectra are consistent with the hypothesis of a distribution about a mean value. It is concluded that the concept of a \"dominant ground period\" is not valid for the purpose of aseismic structural design. Further research on damping in buildings is recommended, and it is proposed that the mean value of a damped spectrum be used as a quantitative measure of earthquake intensity.", "date": "1964-01-01", "date_type": "published", "publisher": "California Institute of Technology", "id_number": "CaltechEERL:1964.EERL.1964.001", "official_url": "https://resolver.caltech.edu/CaltechEERL:1964.EERL.1964.001", "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": "Alford_jl_1951.pdf", "url": "https://authors.library.caltech.edu/records/p1j25-k5225/files/Alford_jl_1951.pdf" }, "resource_type": "monograph", "pub_year": "1964", "author_list": "Alford, Jack L.; Housner, George W.; et el." } ]