西安地裂缝场地地震效应分析  

FINITE ELEMENT ANALYSIS OF SEISMIC EFFECTS ON GROUND FISSURES IN XI′AN

作　　者：刘聪[1] 彭建兵[1,2] 陈立伟 邓亚虹[1,2] 吴明[1] 

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]西部矿产资源与地质工程教育部重点实验室,西安710054 [3]中国核电工程有限公司,北京100840

出　　处：《工程地质学报》2012年第6期979-985,共7页Journal of Engineering Geology

基　　金：国家自然科学基金资助项目(40534021 41002106);中央高校基本科研业务费专项资金(CHD2011JC050);中国地质调查局工作项目(1212010641403)

摘　　要：地裂缝是由内、外营力以及人类活动等因素的作用引致发生的一种地面破坏现象。在这种不良的地质条件下,必然会对场地的地震响应带来一定程度的影响。针对地裂缝场地地震效应研究和工程评价的不足,采用有限元法研究了地震荷载作用下,地裂缝对场地地震动效应的影响问题。分析得出了地裂缝对场地地表水平峰值加速度及反应谱的影响特征和影响范围,为地裂缝场地工程结构的抗震设防和地裂缝灾害避让提供了新的参考。Ground fissures are defects on earth＇s surface caused by endogenetic agents, external agents and human activities. Under these adverse geological conditions, ground fissures must have some effects to site earthquake re- sponse. This paper aims at providing research and engineering assessment on site seismic effects of ground fissures. A finite element numerical analysis is made to study the ground motion effects of ground fissures in Xi＇an city. The influence characteristics and influence scope to peak ground acceleration and response spectrum are obtained. The results of analysis provide a reference to engineering structures＇ seismic resistance and hazards avoidance.

关 键 词：地裂缝场地 地震效应 数值分析 峰值加速度 反应谱 

分 类 号：P315[天文地球—地震学]