Numerical Simulation of Dynamic PSSI System Considering Liquefaction

Abstract

Dynamic soil-structure interaction considering liquefaction is a very important topic in the field of earthquake engineering. A three-dimensional numerical analysis of pile-soil-structure interaction (PSSI) system in liquefiable site is carried out. General finite differential program FLAC3D is adopted in the analysis. Boundary condition of the model, soil nonlinearity, nonlinearity on the soil-structure interface and pore water pressure build-up process are taken into account in the calculation model. The computational model and analysis method is verified through comparison study between the calculation and the shaking table test results. The distribution of the pore pressure ratio in sand soil and the acceleration of PSSI system are disscussed in this paper. At last, some important findings are concluded.