COMPARATIVE STUDY OF PROGRESSIVE COLLAPSE ON RCC MULTISTORY BUILDING
Keywords:
OMRF, SMRF, Flexure, Shear, DCRAbstract
The progressive collapse resistance of seismically designed RCC 4 storey building is investigated using
computational simulation models.. Two types of models were analyzed : SMRF & OMRF buildings with & without
masonry infill wall. The study is conducted on previously designed 4-storey prototype buildings by applying the
alternate path method. In this methodology, critical columns and if present, are instantaneously removed from an
analysis model and the ability of the model to successfully absorb member loss is investigated. Member removal in this
manner is intended to represent a situation where an extreme event or abnormal load destroys the member.The
simulation results show that while both systems benefit from placement of the Infill wall on frame members of the
building, the frame with infill walls is less vulnerable to progressive collapse than the frame without Infill wall.
Improvement in behavior is due to improved system due to Infill wall acts as compression strut and resists the
deformation of the frame.