SEISMIC ANALYSIS OF A FLOATING COLUMN BUILDING AND A NORMAL BUILDING.

Abstract: Modern multi-storey buildings are constructed with irregularities such as soft storey, vertical or planirregularity, floating column and heavy loads. These type of structures have become a very common constructionpractice in urban India. It is observed that most of the RC structures with such irregularities constructed are highlyundesirable in seismically active areas from the results of past earthquake studies. These effects occurred due tovarious reasons, such as non-uniform distribution of mass, stiffness and strength. The paper aims towards thereview of study of dynamic structural behavior of multi storey building with floating columns conducted byvarious authors in the past. The analysis is done on building models having different numbers of storey withsimple and complex floor plans with floating columns at different floors in different zones. Shear walls, infillwalls and bracings are provided to increase the lateral load carrying capacity of the building. Various methodssuch as Response spectrum method and Time history method are used for linear and non-linear dynamic analysisof building using FEM software. Dynamic action is caused on building by both wind and earthquakes. Finiteelement base software namely ETABs, SAP2000, STAAD.Pro v8i, used for the analysis which can easilydetermine the parameter such as lateral forces, shear force, axial force, bending moment, storey shear, storey drift,storey displacement. The analysis results of structural response are plotted to compare and discuss.