A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations

作     者：Dongdong WANG Jiarui WANG Junchao WU Junjun DENG Ming SUN 

作者机构：Department of Civil Engineering and Xiamen Engineering Technology Center far Intelligent Maintenance of Infrastructures Xiamen UniversityXiamen 361005China Fujian Provincial Key Laboratory of Mathematical Modeling and High-Performance Scientific ComputationXiamen University Xiamen 361005China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2019年第13卷第2期

页      面：337-352页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：the National Natural Science Foundation of China (Grant Nos.11772280 and 11472233) he Program for Scientific and Technological Innovation Leading Talents of Fujian Province is gratefully acknowledged 

主　　题：meshfree method landslide rainfall three-dimensional two-level gradient smoothing nodal integration 

摘      要：A three-dimensional two-level gradient smoothing meshfree method is presented for rainfall induced landslide simulations. The two-level gradient smoothing for meshfree shape function is elaborated in the threedimensional Lagrangian setting with detailed implementation procedure. It is shown that due to the successive gradient smoothing operation without the requirement of derivative computation in the present formulation, the two-level smoothed gradient of meshfree shape function is capable of achieving a given influence domain more efficiently than the standard gradient of meshfree shape function. Subsequently, the two-level smoothed gradient of meshfree shape function is employed to discretize the weak form of coupled rainfall seepage and soil motion equations in a nodal integration format, as provides an efficient three-dimensional regularized meshfree formulation for large deformation rainfall induced landslide simulations. The exponential damage and pressure dependent plasticity relationships are utilized to describe the failure evolution in landslides. The plastic response of soil is characterized by the true effective stress measure, which is updated according to the rotationally neutralized objective integration algorithm. The effectiveness of the present threedimensional two?level gradient smoothing meshfree method is demonstrated through numerical examples.