2013 Volume 69 Issue 3 Pages 386-403
Numerical simulations of unsaturated soil cyclic shear tests were performed using the three-phase porous media theory and a simplified elasto-plastic constitutive model for sand. As a result, the simulations provided a satisfactory reproduction of the cyclic test results in the cases where the initial suction was low volume regardless of the degree of saturation. In this study, Furthermore influence of the pore air pressure in the analysis was examined by two methods the previously described three-phase analysis and two-phase analysis with the same pore air pressure and pore water pressure. It was the result the two-phase analysis results would overestimate the volumetric compression compared to the three-phase analysis results due to the influence of the pore air.