Ground Response in Lotung: Total Stress Analyses and Parametric Studies
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 128, Issue 1
Abstract
Previous papers have reported on the performance of a recently developed nonlinear ground response analysis code, SPECTRA, with reference to the prediction of the free-field response at a Large-Scale Seismic Test site in Lotung, Taiwan during the M6.5 earthquake of May 20, 1986. Two more major earthquakes of different characteristics shook this test site later that same year, a M6.2 earthquake that occurred on July 30 and a M7.0 earthquake that occurred on November 15. The present article analyzes the free-field responses recorded by a downhole array from these latter two events using the code SPECTRA and a widely used equivalent linear analysis code SHAKE. The studies focus on the relative accuracy and sensitivity of the two codes with respect to the variations of the input material parameters, using time histories, acceleration response spectra, Fourier acceleration amplitude spectra, and Arias intensities as criteria for the comparison. The two codes captured the general wave form of the acceleration histories well, but there was a general tendency for both codes (particularly SHAKE) to underpredict the Arias intensities of the earthquakes.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 128 • Issue 1 • January 2002
Pages: 54 - 63
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jun 28, 2000
Accepted: May 24, 2001
Published online: Jan 1, 2002
Published in print: Jan 2002
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