Dynamic analysis of a cantilever retaining wall including soil-structure interaction

摘要

The main purpose of this paper is to contribute to a quantification of the effect of soil-structure interaction on seismic response of the cantilever retaining walls. Considering five different subsoil conditions, the seismic analyses of backfill-cantilever wall-soil/foundation interaction system were carried out in time domain through finite element method. The finite element model of the system was constructed using the finite element package ANSYS. The backfill-wall interface behaviour was taken into account by using interface elements between the wall and soil to allow for de-bonding. Radiation damping and wave reflection effects were also considered by using artificial viscous boundaries. The response quantities examined incorporate the lateral displacements of the wall relative to the moving base and the stresses in the wall. The results show that soil-structure interaction is of critical importance for seismic design of cantilever retaining walls and accurate consideration of soil-structure interaction in modelling may lead to more realistic and reliable predictions.