High-performance FEM-FVM solid-fluid coupled dynamic analysis method for soil liquefaction

Abstract

This study develops a fully explicit high-performance solid-fluid coupled dynamic analysis method for soil liquefaction using the GEOSX platform, a high-performance simulation framework for modeling geomechanics problems. The method is explicitly coupled, with the solid phase solved by explicit FEM and fluid phase solved by explicit FVM. The CycLiq constitutive model is implemented for simulating sand liquefaction behavior. The accuracy, efficiency, and applicability of this method is evaluated via simulation of the 1D consolidation problem and LEAP-2017 centrifuge shaking table tests. Dynamic simulations of a rockfill dam on and thick liquefiable deposit with different resolutions are conducted, to evaluate the efficiency and scalability of the FEM-FVM solid-fluid coupled dynamic analysis method.