{"title":"Torsional accelerograms","authors":"Vincent W. Lee, Mihailo D. Trifunac","doi":"10.1016/0261-7277(85)90007-5","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, the method of Wong and Trifunac<sup>1</sup> for generating artificial strong motion accelerograms has been extended to generate synthetic torsional accelerograms and their response spectra. The torsional component of strong-motion is gaining attention as it is becoming evident that it may contribute significantly to the overall response of structures to earthquake motions<sup>2</sup>. The synthetic translational component of acceleration is first constructed to have a given Fourier amplitude spectrum and a given duration at the site. It utilizes the characterization of strong shaking in terms of (1) earthquake magnitude and epicentral distance, or (2) Modified Mercalli Intensity at the site. The effects of geologic environment which goven the dispersive properties of ground motion are also included. The synthetic torsional accelerogram is then constructed from the translational component.</p></div>","PeriodicalId":100715,"journal":{"name":"International Journal of Soil Dynamics and Earthquake Engineering","volume":"4 3","pages":"Pages 132-139"},"PeriodicalIF":0.0000,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0261-7277(85)90007-5","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Soil Dynamics and Earthquake Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0261727785900075","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
In this paper, the method of Wong and Trifunac1 for generating artificial strong motion accelerograms has been extended to generate synthetic torsional accelerograms and their response spectra. The torsional component of strong-motion is gaining attention as it is becoming evident that it may contribute significantly to the overall response of structures to earthquake motions2. The synthetic translational component of acceleration is first constructed to have a given Fourier amplitude spectrum and a given duration at the site. It utilizes the characterization of strong shaking in terms of (1) earthquake magnitude and epicentral distance, or (2) Modified Mercalli Intensity at the site. The effects of geologic environment which goven the dispersive properties of ground motion are also included. The synthetic torsional accelerogram is then constructed from the translational component.
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