地震作用下土质边坡稳定性分析方法适用性分析  

Applicability Analysis of Soil Slope Stability Method under Action of Seismic

作　　者：江德军[1] 杨杰[1,2,3] 乔蓓[1] 郑成成[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]陕西省西北旱区生态水利工程重点实验室,陕西西安710048 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《水电能源科学》2013年第12期113-116,共4页Water Resources and Power

基　　金：陕西省生态水利工程国家重点实验室基金资助项目(106-210509)

摘　　要：针对地震作用下边坡稳定分析方法之间的差异及其适用情况尚不明确的问题,以某三级均质土坡为例,基于Quake/w、Geo-Studio、PLAXIS以及FLAC等软件,利用拟静力法、Newmark滑块分析法、动力有限元时程分析法、动力有限元强度折减法及有限差分强度折减法计算出安全系数,对比了5种方法的异同。结果表明,采用拟静力法获得的边坡抗震稳定性偏于安全;Newmark滑块分析法、动力有限元时程分析法计算的安全系数基本相同;动力有限元与有限差分强度折减法计算所得的安全系数相近,但在不同折减系数下计算的监测点位移相差较大。With the ambiguity of applicability and difference of slope stability analysis methods under the action of earthquake, taking a three-level homogeneous soil slope for an example, the pseudo static method, Newmark slipper a- nalysis method, dynamic finite element time history analysis method, dynamic finite element strength reduction and finite difference strength reduction method are applied to calculate safety factors based on Geo-Studio, PLAXIS and FLAC soft- ware. And the similarities and differences of the above methods are compared. The results show that the safety factor u- sing quasi static force method inclines safety; the safety factor obtained by Newmark slipper analysis is almost the same as dynamic finite element time-history analysis; the safety factor with dynamic finite element is similar to that of finite difference strength reduction method, but the displacements of monitoring points are of large differences under different strength reduction coefficients.

关 键 词：地震作用 边坡稳定性 拟静力法 Newmark滑块分析法 动力有限元时程分析法 动力有限元强 度折减法 有限差分强度折减法 

分 类 号：TU457[建筑科学—岩土工程]