SOIL-STRUCTURE INTERACTION STUDIES ON INTEGRAL ABUTMENT BRIDGE WITH SAND AS BACKFILL AND CLAY AROUND PILES

The focus of the present study is on the structural behavior of integral bridges including the effect of soil-structure interaction specifically under thermal loading. Towards this objective, a numerical example is considered in which, the thermal loading parameter and soil parameter are varied. The multi-linear spring stiffness of soil at abutment-backfill interface and at soil pile interface considered in the study are computed and adopted for the soil structure studies. The response of IAB is studied, principally in terms of the displacements and bending moments in the abutments and piles. The study revealed that the response of the IAB is very sensitive to the thermal loading especially at larger temperature change. Also the type of soil as backfill and around piles has prominent influence on the behavior of abutment and piles.