Effects of soil characteristics on seismic-induced pore water pressure around a buried pipeline in a porous seabed

摘要

In this paper a numerical modeling study on liquefaction around a buried pipeline in sandy seabed under seismic loading is presented. The empirical mode of dynamic increase of pore water pressure under undrained shearing induced by seismic loading is incorporated with two-dimensional dynamic consolidation equation and a numerical procedure based on FEM is developed to assess the accumulative pore water pressure.By numerical computations, the accumulation process of pore water pressure and liquefaction potential of seabed soil during seismic loading can be evaluated. Based on the numerical model presented, the effects of soil characteristic parameters on the seismic-induced accumulative pore water pressure around the pipeline and along the seabed depth are discussed in detail.