Geo-Modelling and Geo-Informatics

   doi:10.3850/978-981-07-0188-8_P179

ABSTRACT

A finite element method utilizing overlapping meshes has been developed to solve the system of coupled equations resulting from Biot’s u-U formulation for wave propagation in fluid-saturated porous media. This method considers the interaction between two identical, overlapping meshes, one representing the solid phase and the other the fluid phase. These two meshes are connected at the nodes using collocated dashpots to account for viscous interaction between the two phases, together with appropriate stress strain relations to account for the volumetric interaction. The proposed method has been implemented in the general purpose finite element package, Abaqus, and is hereby referred to as the Abaqus Dual Phase Coupling (ADPC) method. The ADPC method has been validated for a 1D dynamic problem in a previous work. In this paper, the method is extended to two and three dimensions to study problems of practical geotechnical interests involving transient wave propagation in saturated soil media.

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