3D numerical modeling of seismic pile-soil interaction in centrifuge tests

摘要

Seismic responses of a soil-pile-structure are obtained through dynamic centrifuge model tests, and 3D nonlinear finite difference method analyses are then earned out to predict the responses For the centrifuge tests, Jumoonjm sand is compacted into a 0.63 -m -high equivalent shear beam box The system is subjected to the acceleration time history of 12 sine wave and 10 scaled earthquake events Numerical analysis of dynamic centrifuge model tests for single piles with a superstructure is formulated in a time domain in order tc evaluate the behavior of the soil-pile-structure system using the finite difference method program, FLAC3D Soil material nonlmeanty near piles is accounted forbecausenonlmeanty significantly affects seismic response of the pile foundation and superstructure The interface model is used to consider a gap separation between the soil and the pile Input parameters of the soil are selected based on existing geotechnical experiments and back analysis.