Seismic Analysis of Tall Building with Central Core as Tube Structure.

Abstract

A High Rise building with 25 floors having a centralized shear core is analyzed for earthquake loads with respect to a RC Frame Structure having same number of storeys. Comparison is made among the 8 configurations of the same building plan which are: Rigid Frame, Rigid Frame with central shear wall, Tube in Tube Structure, Tube Mega Frame Structure, Suspended Structure, Trussed Tube, Tube in Tube with Outriggers & Frame with central core and outriggers & belt truss. The usefulness of shear walls in the structural planning of multi-storey buildings has long been recognized. Incorporation of shear wall has become inevitable in multi-storey building to resist lateral forces. The buildings have been modeled using ETABS software for earthquake zone V in India. This paper aims to determine the effect of seismic loads, to study the lateral storey displacement, story drift and base shear, Story shear and time period for rigid frame, frame shear wall, braced frame, suspended structure, tube-in-tube and tubed mega framed structure. Dynamic responses under zone V earthquake as per IS 1893 (part 1): 2016 have been carried out. In dynamic analysis, Response Spectrum method is used.