Development and application of a dynamic XFEM for the seismic residual displacement analysis of an embankment

摘要

Newmark's method is a simple engineering method that uses only an input seismic wave and certain other parameters for a slope stability analysis. However, there are several problems with Newmark's method that are caused by the assumption of rigid body dynamics. For example, the method cannot take into account non-arc-shaped sliding surfaces, seismic response acceleration, the deformation of sliding blocks, or pore pressure. By increasing the prediction accuracy of the residual displacement, we believe that an analysis method can represent these important geo-material properties for disaster reduction and disaster prevention. The aim of this paper is to overcome these problems by means of a new numerical technique developed by the author and based on the dynamic extended finite element method (X-FEM). The proposed method takes into account the deformation of sliding blocks, multiple sliding surfaces, and the seismic response acceleration at nonspecific locations.