Finite Deformation Analysis of Dynamic Behavior of Embankment on Liquefiable Sand Deposit Considering Pore Water Flow and Migration

Abstract

To verify the applicability of a finite deformation analysis considering pore water flow using a strain space multiple mechanism model based on Total Lagrangian (TL) and Updated Lagrangian (UL) formulations, seismic response analyses are performed on the dynamic behavior of an embankment considering aftershocks after a main shock. Comparison between the experimental and analytical results indicated that the time history of excess pore water pressure was well simulated by considering the pore water drainage during computation. In addition, the results (e.g., the crest settlement, deformed configuration, and acceleration response) obtained in the finite deformation analyses based on both TL and UL formulations were in good agreement with the measurement. In conclusion, in order to accurately predict the behavior of embankment during and after large earthquakes, including aftershocks, it is required to take into account the effect of both geometrical nonlinearity and pore water flow and migration.