REVIEW ON: SEISMIC SOIL-STRUCTURE INTERACTION OF PILE RAFT FOUNDATION IN MULTI-STORY MRF BUILDING

Abstract

Piled raft foundations are emerging out as an effective and economical foundation system for multi storey
structures. In piled raft foundation the raft and piles both contribute in load sharing. The raft carry load through
contact with soil and provide a reasonable measure of stiffness and load resistance while piles carry load through
skin friction and the provided to reduce the vertical settlements as well as the differential settlements in raft. Soilstructure interaction (SSI) is process in which the response of the soil influences the motion of the structure and the
motion of the structure influences the response of the soil. In general, structure and piled raft under seismic load are
designed considering fixed base condition. However, soil flexibility may result significant changes in the response of
soil-pile raft-structure system. The responses of the superstructure considered include the displacement at top of the
frame and moments in the columns. The effect of soil-structure interaction is found to be quite significant for the type
of foundation.