“EFFECT OF FLOATING COLUMN POSITION ON MULTI-STORIED RCC STRUCTURES SUBJECTED TO DYNAMIC LOADS”

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 behaviour of structure and change of the load transfer path. Present study focuses on the effect of the floating column position on multi storied RCC structures subjected to dynamic loads and the building models are analyzed using time history 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 behaviour 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 SAP2000 software. Many buildings are planned and constructed with architectural complexities. The complexities include various types of irregularities like floating columns at various level and locations.