SEISMIC BEHAVIOR OF RC AND STEEL-CONCRETE COMPOSITE MULTI-STOREY BUILDING WITH FLOATING COLUMNS WITH AND WITHOUT SHEAR WALLS

Vignesh Kini K, Rajeeva S V

Abstract: In recent years, many multi-storey and commercial buildings are constructed with architectural complexities. The complexities are soft storeys or floating columns at various positions and storeys. The buildings with floating columns built in seismically active areas are very dangerous. The storey shear developed at different storey level in building due to earthquake force is to be transferred to the ground through shortest path. But due to the presence of floating columns in the structure, there will be discontinuity in the load transfer path which results in change in the behavior of structure and change of the load transfer path. The building models are analyzed using response spectrum analysis with the assumption that the structure will be subjected to all the loads or full load in a single stretch when the whole structure is constructed completely. The analysis of the building models is done using CSI ETABS 2016 software. The present study involves response spectrum analysis of RC structure and steel-concrete composite structure with floating columns at the middle of penultimate bay, with and without shear walls and the parameters like storey displacement, storey drift and storey shear of RC structure and steel-concrete composite structure with floating columns at the middle of penultimate bay, with and without shear walls are compared.

Keywords: Floating columns, Shear walls, Regular building, RC structure, Steel-concrete Composite structure, Response Spectrum Analysis, CSI ETABS 2016.

DOI: https://doi.org/10.15623/ijret.2017.0606018