ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 03 NO. 04 OCTOBER 2014: 

Title:        SSI Analysis of RC Buildings of Various Shear Wall Shapes – A comparative study of various international seismic code provisions
Authors:    Chinmayi H. K., Jayalekshmi B. R.
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. Analysis of 3D models with these three different shear wall shapes founded on four different soil types categorized based on shear wave velocity are been carried out using finite element software LS DYNA. The results show that the SSI effects are substantial in altering the seismic response. The base shear in cylindrical shape shear wall buildings is lowest for buildings with aspect ratio below 3 when compared with other shapes of shear walls.

Keywords:    Base shear, Shear Wall, Soil-structure interaction, Spectral acceleration coefficient
Page no:      358-363

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