路堑土质边坡地震反应动力稳定性分析  

Stability Analysis of Cutting Slope under Condition of Dynamic Response

作　　者：罗欣[1] 何昌荣[1] 任永强[1] 郭志元[1] 

机构地区：[1]四川大学水利水电学院岩土工程省重点实验室,成都610065

出　　处：《路基工程》2013年第1期46-50,55,共6页Subgrade Engineering

摘　　要：基于Geo-Studio有限元软件,考虑了边坡岩土体材料的动力特性以及地震特性,借助等效线性模型对土质边坡在地震动荷载作用下的应力、变形进行了二维动力反应分析。计算结果表明,在地震波作用下,土质边坡最大水平及竖向动位移均随深度的增加而递减,最大值都出现在坡顶处。采用平均小稳定系数对边坡稳定性进行了评价,并与拟静力法的结果进行了对比分析,证实了水平拟静因子取值范围的合理性。With GeoStudio finite element software, taking dynamic characteristics of materials of rock and soil at the slope and features of earthquake into consideration and using equivalent linear model, two-dimensional dynamic response of soil slope under dynamic earthquake load, such as the stress and deformation therein, is analyzed. The result shows that under action of seismic wave, the maximum horizontal and vertical dynamic displacements decrease with the increase of depth and the peaks arise at the slope top. The slope stability is assessed by use of average small safety factor and then compared to the result obtained by use of pseudo - static method, thus the reasonability of valuing range of horizontal pseudo-static factor is proved.

关 键 词：地震反应分析 地震波 时程分析 拟静力法 

分 类 号：U416.14[交通运输工程—道路与铁道工程]