Abstract: Owing to the difficulties involved in making dynamic analytical models of the soil system, it is common practice to ignore soil structure interaction (SSI) effects, simply by treating structures as if they are rigidly based, regardless of the soil condition. However, to evaluate the seismic response of a structure at a given site the dynamic properties of the combined soil-structure system must be examined. To understand the effect of SSI on structural behaviour of building supported on isolated foundation. A total of 14 models consisting of five and eight stories building structures supported on isolated footing such as Square & Rectangular footings are created. The parameter varied includes soil types like Hard, Medium and Soft Soil. Effect of SSI is accounted by means of point spring element and fixed support condition. Based on Comparison of time period for point spring element and fixed support it is observed the magnitude of time period for Soft Soil Condition is higher in comparison to Fixed Support, Medium and Hard Soil types. The Story Response values such as Displacement, Base Shear and Overturning moment was always higher for Soft Soil. Thus Soft Soil condition is more critical in all cases.
Keywords: soil structure interaction, E-tabs, time period, displacement, time history analysis, over turning moment, base shear, storey shear.
Title: Soil Structure Interaction Effects on Structure Response with Isolated Footing
Author: Lavanya. N, Dr. Vijaya G S
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
Research Publish Journals
