Investigation of Progressive Collapse Resistance in RC Frame Buildings Designed in Iran s Higher Risk Seismic Zones

The certainty of the structure has always been considered vital to civil projects engineers. One of themechanisms emphasized more recently is progressive collapse. It is a collapse in which a local break in the main structure will result in a successive failure in the next sections and finally a part or whole of the structure gets destroyed. This study, using the statute General Services Administration (GSA) and the software SAP2000 has investigated the resistance of progressive collapse in RC frame buildings with medium ductility designed in very high and high-risk Seismic zones based on the statute 2800 in Iran and in two altitudes 5 storey and 10 storey . Having been designed for constant loading, the buildings were analyzed by nonlinear static and Pushdown analysis applying side and corner column elimination. Based on the defined loadings in GSA and the bearing capacity diagrams of the structures, the resistance or the bearing capacity of the buildings designed in higher risk seismic zones has been acceptable. And also according to the results, the rise in height and floor numbers makes the buildings more resistant against the progressive collapse. Moreover, eliminating the side column outperforms eliminating the corner column resulting in more resistance.

Keywords:

Progressive Collapse , RC Frame , Nonlinear Static Analysis , Pushdown Analysis , High-Risk Zone