Unified modeling of soil behaviors before/after flow liquefaction

摘要

Flow liquefaction of soil involves a phase transition process from solid to fluid. A constitutive model that can describe the soil behaviors of both the solid and fluid phases in a unified way was proposed. The constitutive model adopts a phase transition criterion to detect the onset of flow liquefaction and associates an elastoplastic relation and a fluid relation in a single framework. The simulated results demonstrated that the proposed model can describe the fundamental behaviors of soil in both the solid and fluid phases with a smooth transition from soil-like behavior to fluid-like behavior during the phase transition process.