Strength softening models of soil and its application in rainfall-induced landslide simulation  

作　　者：Zhendong Fu Jiachun Li 

机构地区：[1]Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences

出　　处：《Theoretical & Applied Mechanics Letters》2013年第4期23-28,共6页力学快报（英文版）

基　　金：supported by the National Natural Science Funds of China (10932012)

摘　　要：In this study, strength softening models are developed for exploring rainfall-induced landslide mechanism based on Mohr Coulomb strength theory with both saturation degree and temporal evolution into consideration. According to the ratio of two time scales available, the model can be classified into three categories, i.e., instant softening model, delay softening model, and coupling softening model. Corresponding evolution functions are specified to represent these kinds of softening processes and then applied to simulate landslide of homogeneous slopes triggered by rainfall, therefrom, useful conclusions can be drawn in the end.In this study, strength softening models are developed for exploring rainfall-induced landslide mechanism based on Mohr Coulomb strength theory with both saturation degree and temporal evolution into consideration. According to the ratio of two time scales available, the model can be classified into three categories, i.e., instant softening model, delay softening model, and coupling softening model. Corresponding evolution functions are specified to represent these kinds of softening processes and then applied to simulate landslide of homogeneous slopes triggered by rainfall, therefrom, useful conclusions can be drawn in the end.

关 键 词：homogeneous slope numerical simulation strength softening model rainfall-induced landslide geological disaster 

分 类 号：P642.22[天文地球—工程地质学] TU4[天文地球—地质矿产勘探]