基于有限元水平地震荷载作用下土坡稳定性分析  

Analysis on Soil Slope Stability under Horizontal Earthquake Load Based on Finite Element

作　　者：任永强[1] 何昌荣[1] 路永珍[1] 

机构地区：[1]四川大学水利水电工程学院岩土工程省重点实验室,成都610065

出　　处：《路基工程》2011年第6期41-44,共4页Subgrade Engineering

摘　　要：基于GeoStudio有限元软件,分析水平向地震荷载对边坡稳定的影响,借助拟静力法和莫尔-库伦理想弹塑性模型在水平向地震荷载作用下的应力、变形,应用slope/w刚体极限平衡稳定分析程序与sigma/w有限元程序相结合的方法,以有限元矩形单元网格边界组成的锯齿状滑裂面替代传统的圆弧滑动面,对一土坡的稳定性进行了分析。计算结果表明,二者的计算结果相近,且在相同工况下有限元计算安全系数略大于刚体极限平衡法计算安全系数。Based on GeoStudio finite element software, the influence of horizontal earthquake load on slope stability is analyzed. Depending on quasi-static method and the stress and deformation of Mohr-Coulomb ideal elastic-plastic model under horizontal earthquake load, the stability of a soil slope is analyzed using slope/w rigid body ultimate equilibrium program combined with sigma/w finite element program, where the serrated sliding surface composed by rectangular finite element mesh boundary substituted for traditional arc sliding surface. It is shown that the calculation results are close using these two methods. Under the same conditions, safety factor calculated using finite element method is slightly more than that using rigid body ultimate equilibrium method.

关 键 词：边坡稳定分析 锯齿状滑裂面 水平地震荷载 拟静力法 有限元法 

分 类 号：U416.14[交通运输工程—道路与铁道工程]