SOIL-WATER COUPLED ANALYSIS METHOD WITH CAM-CLAY MODEL BASED ON MULTIPLICATIVE DECOMPOSITION OF DEFORMATION GRADIENT

Abstract

 This paper presents a soil-water coupled finite deformation analysis method based on mixture theory. We adopt the 𝒖-𝑝 formulation, which takes the displacement of the solid phase and the pressure of the liquid phase as unknowns, and applied finite element discretization to both displacement and pressure. The Cam-clay model based on the multiplicative decomposition theory of the deformation gradient is applied to the constitutive model of the solid phase. We simulate triaxial compression tests with a both drained and undrained conditions to verify the proposed formulation.