ABSTRACT
Liquefaction of foundation ground during earthquakes can induce large deformations such as settlement of foundation structures, floating of underground structures, slope failures, and lateral spreading. Effective numerical simulation of these phenomena requires methods using specialized algorithms to account for the large deformations that geomaterials undergo. This work proposes a numerical simulator based on the particle-based Material Point Method (MPM), into which we introduce Biot’s porous media theory. Discretizing the governing equation for a two-phase material according to the MPM framework, the Bowl model for liquefaction constitutive model is employed for dilatancy and the Ramberg-Osgood model for the nonlinearity of stress-strain relationship. The simulator is verified by comparing with an exact solution and validated by carrying out centrifuge model testing. This paper reports on the formulation, verification and validation of the newly developed simulator.
