EFFECT OF DEPTH OF EMBEDMENT ON DYNAMIC RESPONSE OF FRAMED BUILDING

Abstract

In the present study, an attempt has been made to investigate 'analytically the effect of depth of embedment on seismic response of a five storeyed R.C.C. framed building. .In order to provide a parametric study three types of soils have been considered, i.e. hard, medium and soft with respect to stiffness they offer to deformation A comparative study has also been made, for two types of foundation, i.e. isolated footing and raft footing. 2-D analysis of the building has been performed and the soil-structure interaction has been modelled by elastic half space approach in which. soil resistance acting on the footing and walls of building is represented by equivalent frequency independent springs. The springs • representing the resistance of surrounding soil on the .building have been derived using the concept of modulus of horizontal and vertical subgrade reaction. Results of analysis indicate that embedment • affects the seismic response of the framed. building• significantly. Furthermore,, embedment effects are more pronounced for softer soil. . The dynamic displacement of • building can be controlled by providing adequate embedment to the.'building.