Numerical analysis of the seismic behavior of tunnels constructed in liquefiable soils
Résumé
This paper includes a numerical study of the seismic behavior of tunnels constructed in liquefiable soils. It is carried out using finite element modeling based on the (u-p) formulation (displacement for the solid phase and pore-pressure for the fluid phase). The behavior of the soil material is modeled using a cyclic elastoplastic constitutive relation involving both isotropic and kinematic hardening. The paper is composed of three parts. The first part includes a brief presentation of the numerical model used in this study; the second concerns the analysis of a reference example; the last part presents a parametric study of the influence of both loading and soil characteristics on the seismic response of tunnels constructed in saturated soils.