COMPARISON OF RESPONSE SPECTRUM ANALYSIS AND CONSTRUCTION SEQUENCE ANALYSIS OF RC AND STEEL-CONCRETE COMPOSITE MULTI-STOREY BUILDING WITH FLOATING COLUMNS

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 that are developed at different storey level in building due to earthquake force is to be transferred to the ground through the 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 the 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 dead load due to various structural components and finishes are imposed on the structure sequentially as the construction is done storey-wise. For better understanding the non-linear behavior of material and the structural members, the construction sequence analysis is carried out. The analysis of the building models is done with the help of CSI ETABS 2016 software. The present study involves the analysis like response spectrum analysis and construction sequence analysis, which is done on a G+20 multi-storey RC and steel-concrete composite building with floating columns at middle of penultimate bay and the parameters like maximum bending moment, maximum shear force and maximum deflection of the transfer beam are compared.

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

DOI: https://doi.org/10.15623/ijret.2017.0605011