ANALYTICAL STUDY OF ABUTMENT AND PILE BEHAVIOUR OF IAB WITH SOIL INTERACTION

Abstract

In this paper, a parametric study was conducted to investigate the effects of various geotechnical properties of the foundation soil on the performance of IAB (Integral Abutment Bridge) subjected to temperature variations from -20 O C to +40 O C. These temperature changes were applied throughout the bridge deck in longitudinal direction. The 3-Dimensional models were prepared using SAP 2000 a Finite Element based software for varying spans and supported on abutments which were connected to the piles. These piles were embedded in the soil up to 40metre depth. The two categories of soils considered in current study were, homogeneous and heterogeneous. Under homogenous, sand with varying angle of internal friction from 29 O to 35 O and clay with varying consistency from firm to very stiff were considered. Under heterogeneous, both sand & clay were considered with alternate strips of sand and clay, with increasing stiffness at every 5metre strips. In the same way, clay & rock were also considered with alternate strips of clay and rock with increasing stiffness at every 5metre strips. Behavior of Abutment and piles were studied for different configurations .Analytical results were compared for various spans considered. i.e., 10m, 20m and 30m span of IAB.