Soil Structure Interaction Effect on the Dynamic Behavior of Irregular R.C. Frame with Isolated Footings

Abstract — In the present study focuses on soil structure interaction analysis of 3D 2x4 bay 4 story RC frame plan and vertical irregular building resting on isolated footing supporting on soil medium with different zones and soil types subjected to normal loads and seismic loads. There are 3 linear-elastic and isotropic models of the soil beneath the structure such as fixed base, spring model and soil continuum. The dynamic analysis is carryout on RC frame irregular structure using time history analysis by the fem software sap2000. Based on the results, comparing with 3 models it conclude that the soil structure interaction investigate effect are lateral displacement, natural frequency, story drift and base shear increases and natural period is decreases