Abstract :
Conventional structural design practice assumes the base of structures to be fixed by neglecting the effect of soil-structure interaction (SSI). During earthquakes, structural displacements and ground displacements are interdependent of each other. This mutual dependency of the structure and soil behaviour is termed as SSI. It is unrealistic to analyse structure by considering it to be fixed. Hence present study looks into the effect of soil flexibility on variation in natural period, spectral acceleration coefficient, and base shear obtained by adopting the seismic provisions of Indian seismic code (IS 1893) and International building code (IBC) in multi-storey reinforced concrete framed buildings with different aspect ratio having rectangular, channel and cylindrical shapes of shear walls over raft foundation.
Keyword :
Base shear, Shear Wall, Soil-structure interaction, Spectral acceleration coefficient