Torsional Behavior of Horizontal Irregular Buildings During Earthquake

Most recent earthquakes have shown that the irregular distribution of mass, stiffness and strengths may cause serious damage in structural systems. However an accurate evaluation of the seismic behaviour of irregular buildings is quite difficult and a complicated problem Due to the variety of parameters and the choice of possible models for torsionally unbalanced systems, there is as yet no common agreement or any accurate procedure advised by researchers on common practice in order to evaluate the torsional effects. In this book three frames were exerted which were three different shapes (symmetric, L shape and T shape) in three different heights (G+3, G+6 and G+9 story). The frames were analysed by Response Spectrum Method and then the frames were assessed by nonlinear static (pushover) analysis mainly based on FEMA 440 (2005).