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Nonlinear site models derived from 1d analyses for ground-motion prediction equations using site class as the site parameter

John X. Zhao, Hu Junsheng, Jiang Fei, Zhou Jun, Zhang Yingbin, An Xiaowen, Lu Ming and David A. Rhoades
Nonlinear site models derived from 1d analyses for ground-motion prediction equations using site class as the site parameter
Bulletin of the Seismological Society of America (June 2015) 105 (4): 2010-2022

Abstract

Nonlinear site models are an important part of ground-motion prediction equations (GMPEs) and can be constructed in a number of ways. If numerous soil-site strong-motion records contain the effect of strong nonlinear soil response, the parameters for the nonlinear model can be a part of the regression parameters for GMPEs. It is also possible to derive nonlinear site models by numerical simulation. However, the number of strong-motion records from Japan that contain the effect of strong nonlinear soil response is still too small to derive nonlinear site terms. We present a model of nonlinear site terms using site class as the site parameter in GMPEs based on a 1D equivalent linear model. The 1D model was constructed based on the shear-wave velocity profiles from the KiK-net strong-motion stations with a wide range of site periods, soil depth, and impedance ratios. The rock-site strong-motion records were from different earthquake categories in Japan and the Pacific Earthquake Engineering Research Center dataset. Those records had a wide range of earthquake magnitudes, source distances, and peak ground accelerations. A random effects regression model was fitted to the calculated spectral amplification ratios, accounting for the effect of site impedance ratios, earthquake magnitudes, and source distances of the rock-site records. We also designed a method to adjust the 1D model so it can be used in a GMPE, accounting for the fact that a 1D model is an overly simplistic assumption for many real strong-motion recording stations in many parts of the world.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 105
Serial Issue: 4
Title: Nonlinear site models derived from 1d analyses for ground-motion prediction equations using site class as the site parameter
Affiliation: Southwest Jiaotong University, Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Chengdu, China
Pages: 2010-2022
Published: 20150616
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 28
Accession Number: 2015-070039
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables
N30°00'00" - N45°00'00", E129°00'00" - E147°00'00"
Secondary Affiliation: Yunnan Institute of Earthquake Engineering, CHN, ChinaChina Earthquake Administration, CHN, ChinaGNS Science, AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201530
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