9:15 AM - 9:30 AM
[S03A-02] A multiphase coupled 2-Point MPM for simulating large deformation of unsaturated soil
Keywords:Material Point Method, Multiphase coupled analysis, Unsaturated soil
In recent years, various deformation analysis methods for geomaterials have been developed. One of them is Material Point Method, which is a hybrid method of the lattice method and the particle method, has an advantage in large deformation analysis. For simulating soil deformation including unsaturated regime, it is necessary to formulate the MPM based on the multiphase coupled theory. The purpose of this study is to propose a 2-point MPM formulation for multiphase systems considering convection between solid and liquid phases, in which the solid phase and pore fluid phase are separately solved using two-layer material points. Verification of the formulation and the application of the method to a liquefaction-induced large deformation problem are presented.