Abstract
An improvement of the FEM-FDM coupled scheme is presented for dynamic analysis of fully saturated soil considering large deformation. In the space domain, the equilibrium equation of fluid saturated soil is discretized by the finite element method, as well as the continuity equation is discretized by the finite difference method within a rectangular mesh which is difference from that used by the finite element method.The finite difference method used in a difference mesh would not suffer from numerical problems when the initial mesh of the finite element method is not rectangular or the mesh is heavily distorted for large deformation. The proposed method is applied to a one-dimensional elastic consolidation problem and an embankment problem in order to verify its usefulness.
