地震荷载作用下斜坡响应研究:以四川青川东山—狮子梁剖面为例  

Study on Slope Response under Seismic Loading:Taking the DongshanShiziliang Profile in Qingchuan,Sichuan as an Example

作　　者：王福海[1] 王运生[1] 孙刚[1] 徐鸿彪[1] 罗骑龙[1] 李玉林[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《现代地质》2011年第1期142-150,共9页Geoscience

基　　金：中国地质调查局项目(1212010914010);国家重点基础研究发展计划项目(2008CB425801);国家自然科学基金项目(41072231)

摘　　要：在对青川地震监测剖面实测数据进行系统分析的基础上,运用大型通用有限元分析软件ANSYS建立东山—狮子梁监测剖面的数值模型,分析了地震作用下斜坡的动力响应规律。结果表明:地震荷载作用下,斜坡的地震响应不是单调的随斜坡高度的增加而增加,而是与斜坡地形地貌及岩体中裂隙的发育程度有密切关系;斜坡的地震响应由坡内向坡外逐渐增大,且坡向与地震波传播方向相同时斜坡的地震动力响应要大于坡向与地震波传播方向相反的情况。研究结果为地震荷载作用下边坡稳定性评价提供了理论支持,为提出更加合理的地震动稳定性评价方法提供依据。Based on systematic analysis of field data of earthquake monitoring profile in Qingchuan,Sichuan,this paper employed the universal finite element analysis software（ANSYS） to establish a numerical model of Dongshan-Shiziliang monitoring profile,and the response of the slope under seismic loading was simulated.The results show that： under seismic loading,the seismic response of slope does not monotonously increase,but is closely related with the slope landform and the development degree of fractures in rock masses;the seismic response increases gradually from the inside of slope to its surface,and when the slope direction is same with the wave propagation the response is greater than that in the opposite direction.This study provides a basis for proposing a more reasonable method to evaluate slope stability under seismic loading.

关 键 词：ANSYS 地震荷载 斜坡 地震加速度 动力响应 数值模拟 四川青川 

分 类 号：P315[天文地球—地震学]