EVALUATION OF NONLINEAR STATIC PROGRESSIVE COLLAPSE IN IRREGULAR CONCRETE STRUCTURES

Progressive collapse is a structural catastrophic phenomenon, which can cause by natural disasters or human negligence where local failure of a member causes significant deformations that leads to destruction of structure. In this study, evaluation of the progressive collapse in concrete structures with intermediate moment frame in irregular state in plan according to GSA(2003) & DOD(2009) and using APM on “Open Sees” software with nonlinear static analysis in 3D structures 3, 6 and 10 stories has been carried out. The obtained results indicate that in creating this phenomenon the location of the removed column and the height of the structure has the most effect.