Solid and water interaction analysis by NMM-DDA and MPS methods applied to large-scale landslide triggered by earthquake

摘要

Discontinuous Deformation Analysis (DDA) and Distinct Element Method (DEM) has been used as analyses methods of the slope disasters. However, these methods cannot handle the mixed body of fluid and solid material appropriately. In the past decades, the meshless MPS method has been developed within the Lagrangian framework. In MPS, the fully Navier-Stoke equation can be solved without using computational grids or meshes, and MPS is suitable for simulating motion and fragmentation of fluid. In this study, NMM-DDA and MPS have been newly combined to simulate landslide behavior in the earthquake. In the coupling method of NMM-DDA and MPS, rock block movement is solved by NMM-DDA and water movement inside the rock mass is solved by MPS method separately. The formulation of the coupling method and the simulation for the large-scale landslide triggered by the earthquake will be presented.