Identification of non linear site response using the H/V spectral ratio method
2010-04-05 03:36:01KLWen溫國梁JYHuangHsuMLinandKuo
地震科學(xué)進(jìn)展 2010年6期
KL Wen(溫國梁),JY Huang,H J Hsu,C ML inand C H Kuo
1)Institute of Geophysics,Central University,Taoyuan County 32001 2)Center for Research on Earthquake Engineering,Taipei
The horizontal-to-vertical spectral ratio has become popular in studies of the site effect and the determination of the predominant period of a site.In this study,this method is extended to identify nonlinear soil responses.To establish this fact,boreholear-ray records that have already show n nonlinear site responsesp reviously using the spectral ratios between surface and borehole station pairs are analyzed.However in this study,the horizontal-to-vertical spectral ratio method is used fo r w eak and strong mo tion reco rds from the same datasets.The results show that nonlinear site responses can be evaluated using horizontal-to-vertical spectral ratios of surface reco rdings at a single station. We can try to apply this method to study the nonlinear soil response during the 2008 Wenchuan,China earthquake thereafter.
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