STABILITY ANALYSIS OF TWO-DIMENSIONAL LANDSLIDES SUBJECTED TO SEISMIC LOADS

作     者：Xiaoping Zhou Qihu Qian Hao Cheng Haipeng Zhang 

作者机构：School of Civil Engineering Chongqing University Key Laboratory of New Technology for Construction of Cities in Mountain AreasMinistry of Education Engineering Institute of National Defense Engineering PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact PLA University of Science and Technology 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2015年第28卷第3期

页      面：262-276页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：Project supported by the National Natural Science Foundation of China(Nos.51325903 and 51279218) Natural Science Foundation Project of CQ CSTC(Nos.CSTC2013KJRC-1JCCJ30001 and CSTC2015jcyjys30001) the Fundamental Research Funds for the Central Universities(No.CDJXS12201108) 

主　　题：pseudo-dynamic factor of safety slices method inertia force damping force sliding displacement displacement-pseudo-dynamic model two-dimensional landslides seismic loads 

摘      要：In the past, the pseudo-static method used to be the most common for evaluating the stability of landslides under seismic loads, in which static forces acting on the center of gravity of a sliding body are used to consider the effects of earthquake. However, seismic loads of rock and soil differ from time and location to time and location. Obviously, it is irrational for the pseudo-static approach to be applied to solving dynamic problems. In this paper, a displacement- pseudo-dynamic model is proposed to assess seismic stability of landslides, in which the sinusoidal- cosinusoidal wave is applied to simulating earthquake displacement, and an ＂amplification factor＂ of peak seismic displacement is referred to as the amplification of seismic wave when it propagates from the bottom to the top of the landslide. The effects of physico-mechanical behaviors of a sliding body on seismic stability of soil slopes are taken into account as well as inertia forces and damping forces. The sensitivity analyses on the permanent displacement and the dynamic factor of safety of landslides are studied in detail. Moreover, a large-scale Tangjiashan landslide that occurred in Wenchuan earthquake is investigated to verify the robustness and precision of the present method. It is found that the results from the present method is in good agreement with those from the previous method.