Two-phase finite element procedures for dynamic analysis of saturated porous media

A three-dimensional dynamic analysis program for saturated porous-rocks and soils (MPDAP-3D) is developed in this study. The theoretical formulations incorporated in the proposed computer program are the extension of Biot's t wo-phase theory to non-linear region. The generalized Hoek and Brown model is used to represent the skeleton constitutive relation. A three-dimensiona l elasto-plastic matrix for the generalized Hock and Brown model is derived by extending two-dimensional formulation. Numerical study for typical veri fication problems is carried out to show the validation of the computationa l algorithms of the computer program.