Multiscale Modelling of Normal Fault Rupture-Soil-Foundation Interaction

A multiscale approach [1] that couples the finite-element method (FEM) and discrete-element (DEM) is employed to model analyse earthquake fault rupture-soil-foundation interaction (FR-SFI) problem. In approach, soil constitutive responses are obtained from DEM solutions of representative volume elements (RVEs) embedded at FEM integration points so as effectively bypass phenomenological hypotheses in conventional simulations. The rupture surfaces shear localization patterns under normal faults with or without foundation atop have been well captured by verified available centrifuge experimental [2] numerical results [3]. By examining microstructural evolutions local RVE packings, it found RVEs located in- outside bands behave distinctly, may change their stress states initial atrest active case. micromechanics study also sheds lights on capability heavy foundations protecting superstructure a result surface diversion.