地震工程学报Issue(3)：489-494,6.DOI:10.3969/j.issn.1000-0844.2014.03.0489
西昌断陷盆地场地地震动差异分析
Study on Difference of Ground Motions in Faulted Basin of Xichang
摘要
Abstract
In this study,by analyzing the peak ground acceleration (PGA)and spectral character-istics of the earthquake acceleration records from the main shock of the Wenchuan earthquake, the difference of the ground motion at both sides of the Anninghe fault zone is discussed.By ana-lyzing the local site conditions at the observation stations,such as local site soil,topography,and tectonics,a preliminary explanation of the discrepancy is obtained,and the numerical solution of 2D model of this site derived by the explicit finite element combined with the local multi-trans-mitting artificial boundary method is used to interpret the mechanism causing the difference in the ground motion.The results of numerical calculations indicate that in spite of its simplicity,such an idealized model is also successful in reproducing many of the essential characteristics of ground motion and the mechanism causing the difference in ground motion within the fault zones of An-ninghe.The characteristics of the faulted basin under control of the Anninghe fault zone may be used to interpret observed seismic data obtained during the Wenchuan main shock and theoretical calculations of nearby fault responses in Xichang.关键词
断陷盆地/安宁河断裂/地震动记录/局部场地条件/数值模拟Key words
faulted basin/Anninghe fault zone/ground motion/local site conditions/numerical simulation分类
天文与地球科学引用本文复制引用
刘必灯,王伟,于淼..西昌断陷盆地场地地震动差异分析[J].地震工程学报,2014,(3):489-494,6.基金项目
中央高校基本科研业务费专项(ZY20110205,ZY20110206,ZY20120103) （ZY20110205,ZY20110206,ZY20120103）
国家自然科学基金(51208107,51308118) （51208107,51308118）
