  In this paper, we describe a soil-fluid-structure interaction model that
combines soil mechanics (saturated sediments), fluid mechanics (seawater or
air), and solid mechanics (structures). The formulation combines the Material
Point Method, which models large deformation of the porous media and the
structure, with the Implicit Continuous-fluid Eulerian, which models complex
fluid flows. We validate the model and simulate the whole process of
earthquake-induced submarine landslides. We show that this model captures
complex interactions between saturated sediment, seawater, and structure, so we
can use the model to estimate the impact of potential submarine landslides on
offshore structures.
