Verification of numerical liquefaction model using dynamic centrifuge test

Abstract

Numerical liquefaction model and analysis procedure are verified based on the dynamic centrifuge test results. The test was a part of the Liquefaction Experiments Analysis Project (LEAP). The model ground was formed inside of the rigid box by using the submerged Ottawa F65 sand with a relative density of 55% and 5 ° of surface inclination. A tapered sinusoidal wave with a frequency of 1 Hz was applied to the base of the model box. Numerical analyses were performed under two and three-dimensional condition in prototype scale. The soil is modeled to show hysteretic behavior before shear failure, and Mohr-Coulomb model is applied for shear failure criterion. Byrne's liquefaction model was applied to track the changes in pore pressure due to cyclic loading after static equilibrium. The numerical analyses performed in this study showed good agreement with the physical test results.