Hybrid asynchronous SEM/FEM co-simulation for seismic nonlinear analysis of concrete gravity dams

Michael Brun (1) , Florent de Martin (2) , Nicolas Richart (3)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
3 EPFL - Ecole Polytechnique Fédérale de Lausanne

The aim of this work is to take full advantage of Spectral Element (SE) and Finite Element (FE) codes by setting up a SEM/FEM co-simulation strategy for soil structure interaction problems, involving a SE code to generate and propagate elastic waves in the soil, while a FE code enables the detailed representation of the studied structure. The spatial coupling is managed by the standard coupling mortar approach, whereas the time integration is dealt with an hybrid (explicit/implicit) asynchronous (different time steps) time integrator. The SEM/FEM co-simulation strategy is set up for linear or nonlinear transient dynamics. A seismic analysis of a concrete dam is considered in order to demonstrate the versatility of the co-simulation approach, assuming a linear rheology or a nonlinear damaging behaviour of the concrete.

Mots clés: Elastic wave; Domain decomposition; SEM/FEM co-simulation; Nonlinear transient analysis; Hybrid asynchronous time integrator; Soil structure interaction

Domaines: Sciences de l'ingénieur [physics]

Michael Brun, Florent de Martin, Nicolas Richart. Hybrid asynchronous SEM/FEM co-simulation for seismic nonlinear analysis of concrete gravity dams. Computers & Structures, 2021, 245, pp.106459. ⟨10.1016/j.compstruc.2020.106459⟩. ⟨hal-03230816⟩