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• W2890188219 abstract "Research Article| September 11, 2018 Synthesizing Nonstationary Earthquake Ground Motion via Empirically Simulated Equivalent Group Velocity Dispersion Curves for Western Himalayan Region Neha Kumari; Neha Kumari aDepartment of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India, nehagp02@gmail.comsharmamukat@gmail.com Search for other works by this author on: GSW Google Scholar I. D. Gupta; I. D. Gupta bRow House 4, Suncity, Pune 411051, India, idgrh4@gmail.comcFormerly at CWPRS Pune, Pune 411051, India; and IIT Roorkee, Roorkee 247667, India. Search for other works by this author on: GSW Google Scholar M. L. Sharma M. L. Sharma aDepartment of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India, nehagp02@gmail.comsharmamukat@gmail.com Search for other works by this author on: GSW Google Scholar Author and Article Information Neha Kumari aDepartment of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India, nehagp02@gmail.comsharmamukat@gmail.com I. D. Gupta bRow House 4, Suncity, Pune 411051, India, idgrh4@gmail.comcFormerly at CWPRS Pune, Pune 411051, India; and IIT Roorkee, Roorkee 247667, India. M. L. Sharma aDepartment of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India, nehagp02@gmail.comsharmamukat@gmail.com Publisher: Seismological Society of America First Online: 11 Sep 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (6): 3469–3487. https://doi.org/10.1785/0120170387 Article history First Online: 11 Sep 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Neha Kumari, I. D. Gupta, M. L. Sharma; Synthesizing Nonstationary Earthquake Ground Motion via Empirically Simulated Equivalent Group Velocity Dispersion Curves for Western Himalayan Region. Bulletin of the Seismological Society of America 2018;; 108 (6): 3469–3487. doi: https://doi.org/10.1785/0120170387 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract The ground acceleration time histories generated using uniformly random phase spectrum are unable to model the nonstationarity in both the amplitudes and the frequency contents in a physically realistic way. Though the nonstationarity in amplitudes can be assigned easily using a deterministic envelope function, it is necessary to define a realistic phase spectrum to achieve the nonstationary frequency contents. Frequency nonstationarity may significantly influence the fatigue and nonlinear behavior of structures. This article proposes a method to define the Fourier phase spectrum of ground acceleration using empirically simulated equivalent group velocity dispersion curves. Empirical prediction relations are developed for the group velocity dispersion curves using a database of 378 horizontal components of accelerograms recorded from 67 different earthquakes at 61 sites in the western Himalayan region. The empirically predicted dispersion curves are shown to be in fairly good agreement with the actual dispersion curves for several real accelerograms with widely differing characteristics. The empirical dispersion curves are used to simulate the Fourier phase spectra for generation of synthetic accelerograms in this article. The synthetic accelerograms generated using Fourier amplitude spectra (FAS) of several real accelerograms are shown to have physically realistic nonstationary characteristics, as evidenced by comparisons between the peak ground accelerations, Husid plots, strong‐motion durations, and elastic pseudoacceleration response spectra of the real and the synthetic accelerograms. The proposed method can thus be considered to provide a useful practical approach for simulation of nonstationary design accelerograms in conjunction with the FAS defined from seismic hazard analysis or the seismological source model approach. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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• W2890188219 date "2018-09-11" @default.
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• W2890188219 title "Synthesizing Nonstationary Earthquake Ground Motion via Empirically Simulated Equivalent Group Velocity Dispersion Curves for Western Himalayan Region" @default.
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