Abstract
MPS method (Moving Particle Semi-implicit or Simulation) is expected as an earthquake response calculation method which can deal with overall responses from elastic wave propagation to failure phenomenon consistently. MPS method solves a wave equation numerically with using particles. Its formulation is very close to that of DEM (Descrete Element Method). It is known that the initial particle configulation affects the failure behavior when DEM is used. Because the influence by the initial configulation is similiarly recognized in MPS analysis, a method which constructs a random initial model is proposed. A formulation for shear and tensile failure, and new contact of particles due to large deformation is also proposed. Failure or collapse analyses caused by fall, own weight or compressive force are conducted. The proposed method is examined through these numerical simulations.
