地震荷载下边坡破裂面形状及其稳定性判识  

Surface and shape of slope fracture under seismic load and determination of its stability

作　　者：王东坡[1,2,3] 何思明[1,2] 欧阳朝军[1,2] 史展[1,2,3] 

机构地区：[1]中国科学院山地灾害与地表过程重点实验室,成都610041 [2]中国科学院水利部成都山地灾害与环境研究所,成都610041 [3]中国科学院研究生院,北京100049

出　　处：《兰州大学学报（自然科学版）》2011年第6期13-17,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(40872181);中国科学院"西部之光-西部博士"项目(基于细观力学的地震滑坡形成机理与动力学过程)

摘　　要：基于极限分析上限定理,结合边坡扇形条分法,采用序列二次规划优化算法并引入条间能量耗散系数,研究了地震荷载下潜在不稳定边坡的破裂面形状及其稳定性,通过算例分析并与相关研究成果比较,验证了本文理论方法的可行性.结果表明本文理论方法预测的潜在边坡破裂面介于直线破裂面与对数螺旋型破裂面之间.Based on the theory of limit analysis, with the slope fan-shaped slice method, this paper utilized the sequential quadratic programming optimization algorithm and introduced the energy dissipation coefficient between fans to study the shape and stability of fracture surfaces of potentially unstable slopes under earthquake. This method proved to be feasible compared with an example analysis result and some similar research results. The result shows that, using this method, the potential slope fracture surface is between the straight line and the logarithmic spiral fracture surface.

关 键 词：上限定理 地震 稳定性 能量耗散系数 

分 类 号：TU443[建筑科学—岩土工程]