Plane strain model for soil-structure interaction analysis

Abstract

The schemes for solving soil-structure interaction problems by means of simplified two- dimensional plane strain models are examined. For foundation without pile, the simplified three-dimensional model proposed by Hwang, Lysmer and Berger is first shown to be ineffective in representing the three-dimensional behavior for the case of concentrated loads. Modification of the model proposed by Hwang et al. is achieved by attaching side springs and dashpots to the plane strain slice together with the adjustment of mass and damping to reproduce three-dimensional effects. The concept underlying the formulation is to force the potential energy, the kinetic energy and the dissipation energy of the proposed model to be equivalent with those of the three-dimensional continuum.