MODELING OF INTERFACE FOR SOIL-STRUCTURE INTERACTION STUDIES

In this study a novel finite element modelling of the plane frame-comb ined footing-soil system, subjected to biaxial loading has been discus sed. The formulation of an isoparametric interface/joint element which is used to model the interface characteristics of the foundation beam and the soil medium has been presented. In addition, some useful sugg estions have been given regarding the proper selection of the values o f tangential and shear stiffnesses K(ss) and K(nn) respectively. Final ly the interactive behaviour of a five storey two bay frame has been s tudied and is compared with the conventional non-interactive analysis. The material non-linearity of the soil has been taken into considerat ion by employing the hyperbolic stress-strain model.