A numerical model for nonlinear large deformation dynamic analysis of unsaturated porous media including hydraulic hysteresis

摘要: Abstract A numerical model based on the theory of mixtures is proposed for nonlinear dynamic analysis flow and deformation in unsaturated porous media. Starting from conservation laws, governing differential equations finite element incremental approximations suitable large static analyses are derived within updated Lagrangian framework. The coupling between solid fluid phases enforced according to effective stress principle taking suction dependency parameter into account. effect hydraulic hysteresis soil water characteristic curve also taken application approach demonstrated through several fundamental problems results compared relevant analytical solutions. effects suction, deformations response soils particularly emphasized.