DYNAMIC ANALYSIS OF EMBANKMENT BASED ON THREE PHASE POROUS MEDIA THEORY USING ELASTO-PLASTIC CONSTITUTIVE MODEL FOR UNSATURATED SOIL

Abstract

 In this paper, the numerical analysis focused on the dynamic behavior of unsaturated embankment was performed with the three-phase (soil, water, and air) coupled analysis based on porous media theory. In this analysis, we employed the conventional constitutive model for unsaturated sandy soil considering the suction-dependent plastic volumetric strain under cyclic loading. The proposed model was validated by the simulation of the cyclic unsaturated tri-axial tests of sandy soil. Furthermore, the simulation of shaking table tests of model embankment affected by seepage water and rainfall confirmed the applicability of the numerical method.