International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 2522 LITERATURE REVIEW ON EFFECT OF SOIL STRUCTURE INTERACTION ON DYNAMIC BEHAVIOUR OF BUILDINGS A. Parvathy Karthika 1 , V. Gayathri 2 1 P.G student, Department of civil engineering, kumaraguru college of technology, Coimbatore 2 Associate professor, Department of civil engineering, kumaraguru college of technology, Coimbatore ----------------------------------------------------------------------***------------------------------------------------------------------ ABSTRACT - Soil Structure Interaction (SSI) is the response of soil which influences the motion of the structure or the motion of the structure which alters the response of soil. Soil structure interaction is prominent for heavy structures, especially for high rise buildings located on soft soil. Incorporation of soil structure interaction effect will reduce the base shear and flexibility of soil. Because of this the stiffness of the building is getting reduced resulting, increase in the natural period of the structure during earthquake. One cause of these deviations is base-slab averaging, in which spatially variable ground motions within the building envelope are averaged within the foundation footprint due to the stiffness and strength of the foundation system. Another cause of deviation is embedment effects, in which foundation-level motions are reduced as a result of ground motion reduction with depth below the free surface. Interaction of pile foundation with wave propagation below the base slab, which can further modify foundation-level motions at the base of a structure. Keywords: Soil structure interaction, flexibility, Kinematic interaction I. INTRODUCTION SOIL STRUCTURE INTERACTION (SSI) - DEFINITION During earthquakes, the structural elements in direct contact with the ground undergo structural displacement or ground displacement will take place in response to the movement of the structure during earthquake. Further, response of soil influences the motion of the structure or motion of structure influences the response of soil. CRITICAL ASPECTS OF SSI There are three critical aspects influencing the soil structure interaction. They are: • Inertia • Free field displacement • Free field rotation Soil structure interaction is prominent for heavy or high rise buildings located on the soft soil, compared to low rise buildings located on the stiff soil. II. REVIEW OF LITERATURES Jonathan et al. (1999) analyzed the procedure for evaluating inertial soil structure interaction effects with respect to seismic structural response. The analysis procedure data's are similar to provisions provided in standard building codes along with considering the influence of site conditions, foundation embedment, flexibility, and shape on foundation impedance. Implementation of analysis procedures and system identification techniques is illustrated using a data of Northridge earthquake (1994). A companion paper applies these analyses to empirically evaluate SSI effects using available strong motion data from a broad range of sites and then comes with general conclusions. Julio et al. (2008) investigated the influence of soil-structure interaction in the analysis and design of a 6-storey and basement reinforced concrete frame building. Models created with different support conditions which include soil- structure interaction (flexible base) and fixed-base behavior are considered. Inclusion of soil structure interaction effect influences dynamic behavior of the building resulting increase in the vibration period as well as increase in the system damping in comparison with the fixed-base model. The influence of the soil-structure interaction in the seismic design of the structure is reflected in a decrease of the horizontal spectral acceleration values. Creating artificial flexibility in the structural analysis provides results such as stress and displacement which are closer to the actual behavior of the structure than those provided by the analysis of a fixed-base structure.