ELASTOPLASTIC ANALYSIS FOR SOIL-STRUCTURE INTERACTION IN FRAMED STRUCTURES

This paper deals with the soil-structure interaction analysis of a pla ne frame-combined footing-soil system, taking in to account essentiall y the elastic-perfectly plastic behaviour of the compressible subsoil. Comparison of the interactive behaviour has also been made with the n on-interactive behaviour and also with behaviour of the system when th e sub-soil is considered as behaving in a linear elastic and non-linea r elastic manner. Hyperbolic representation of the stress-strain behav iour of the soil mass has been used for the non-linear analysis. The e lasto-plastic analysis has been carried out using six different yield criteria for soils, for which the convenient forms and their generaliz ation for the computation of the plastic flow vector are presented for use in the finite element analysis.