PROGRESSIVE COLLAPSE ANALYSIS OF REINFORCED CONCRETE FRAMED STRUCTURE

Rakshith K G, Radhakrishna

Abstract: The progressive collapse of reinforced concrete structures is initiated when one or more vertical load carrying members are removed due to man-made or natural hazards. The building’s weight transfers to neighboring columns in the structure, leads to the failure of adjoining members and finally to the failure of partial or whole structure system. In which the collapsing system continually seeks alternative load paths in order to survive. In the present study the demand capacity ratio (DCR) of reinforced concrete twelve storey framed structure are evaluated as per U.S. General Services Administration (GSA) guidelines. The Linear static analysis is carried out using software, ETABS V9.7. The structural behavior of the building for progressive collapse, a finite element model is considered using the preprocessing function of structural analysis program. Further loading are assigned to model according to IS codes. Analysis is carried out for member forces and reinforcement details. The obtained DCR values show that columns are safe and beams to be reinforced additionally

Keywords: Progressive collapse, ETABS, Finite element model, Column removal

DOI: https://doi.org/10.15623/ijret.2013.0213007