PUSHOVER ANALYSIS OF HIGH RISE RCC BUILDING WITH VERTICAL IRREGULARITIES

Abstract

The seismic behavior of multi-storied building frame during an earthquake motion depends upon the
distribution of strength, mass and stiffness in both horizontal and vertical planes. The structural damage of the building
frame is occurs due to the discontinuity in the stiffness mass and strength between the adjacent stories. The common type
of discontinuity is vertical geometric irregularity which is due to the irregular building configuration in vertical plane.
So there is need to study the seismic response of building frames under different structural irregularities. Pushover
analysis is one of the analysis method which is adopted for the present study. Present study aims towards doing
Nonlinear Static Pushover Analysis of G +20 high rise RCC residential building. This work shows that the comparison
seismic performance and behavior of building frame with and without vertical irregularity in terms of parameter like
story shear, storey displacement, and storey drift. Also comparison of seismic response of the structure in terms of base
shear and displacement along with the location of the plastic hinges at the performance point of all the models are
considered. All building frames are analyzed by using design and analysis software ETABS and design as per IS
456:2000 and IS 1893:2002.