%0 Journal Article
%T Estimation on site effect from different techniques using aftershocks of Chi-Chi earthquake<br>利用集集地震余震记录分析场地地震动反应
%A OUYANG XingYan
%A ZHANG Wen-Bo
%A ZHANG You-Bing
%A <br>欧阳行艳
%A 章文波
%A 张有兵
%J 中国科学院研究生院学报
%D 2009
%I 
%X Site effects are analyzed for the Chelongpu fault area using the aftershock strong-motion data of the 1999 Chi-Chi, Taiwan, earthquake. Four techniques are used including traditional spectral ratios of S wave, generalized inversion technique, receiver function of S wave and genetic algorithm. Our results show that the predominant frequencies for each site estimated by these four methods are almost the same. However, the site amplifications for each site obtained by these methods have some differences. The results of generalized inversion technique and the traditional spectral ratio method are affected by the reference site. After corrected by the site effect of the reference site obtained by genetic algorithm, the corrected results of the generalized inversion technique agree well with the results of genetic algorithm. This shows that genetic algorithm is a reasonable technique to estimate the absolute site effect for a site. In this study, usually, the site amplification obtained by the method of the receiver function is larger than other three techniques. Considering there are still many unclear issues in this method, we suggest that one should be very careful when using receiver function to estimate the site effect. Finally, we gave the QS-value calculated by generalized inversion technique. It is frequency dependent, QS=69.7f?0.73, in the range of frequency 0.4~20Hz.
%K site effects
%K Chi-Chi earthquake
%K reference site
%K predominant frequency
%K genetic algorithm<br>场地反应
%K 集集地震
%K 参考场
%K 卓越频率
%K 放大因子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=67CDFDECD959936E166E0F72DE972847&aid=7B72730F161A7AAD273C0B014D38CF3D&yid=DE12191FBD62783C&vid=96C778EE049EE47D&iid=38B194292C032A66&sid=F4BDB5452F9F5642&eid=9C82B18080268586&journal_id=1002-1175&journal_name=中国科学院研究生院学报&referenced_num=0&reference_num=20