Vertical Geometric Irregularity of Reinforced concrete building

Abstract

this day it is trend to build a building with innovative elevations. These different elevations affects the vertical regularity of building in the form of stiffness, mass or Geometric. In multistory frame building most of the time lateral dynamic forces i.e. wind and earthquake are responsible for failure, and failure will always occurs at structurally weak location in lateral load resisting frame. The major point of weakness are the point where Stiffness, mass or Geometry changes suddenly. Thus irregularity in building leads to greater chance of failure in building. This work deals with the Geometric vertical irregularity in buildings. In these work five different buildings models are taken, first one is with regular elevation (without vertical irregularity) and remaining four models with geometric vertical irregularity. A Nonlinear static analysis (Pushover analysis) is performed on all the five models in Finite element based software and responses in the form of Pushover Curve, base shear and story drift are evaluated. Responses from all five model are compared for evaluating the results and conclusion.