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Abstract

The remarkable partial collapse of the Ronan point apartment tower in 1968 initiated an intellectual discussion among the engineering community on the possible ways to design buildings against such catastrophic progressive types of failure. There are, in general, three alternative approaches to designing structures to reduce their susceptibility to disproportionate collapse such as redundancy or alternate load paths, local resistance and interconnection or continuity from these one or more approaches should be used to avoid progressive collapse. For this study, we consider, simple, low rise three-dimensional steel frame is to be prepared using Etabs 2015 software and are designed according to the Indian Standard Codes, for all load combinations. This model is to be an analysis for progressive collapse analysis as per latest GSA guideline 2013. The main objective of this study is to determine and understand the critical locations of columns in three-dimensional steel frames, which will cause the structure to undergo progressive collapse or maximum damage. The location of column removal largely affects the joint displacement and deformation behavior. Nodal displacement of joint changes abruptly, which indicates that beam-column junction becomes critical. Out of two location corner column removal is more critical as compare to Edge middle location due larger cantilever effect and less connecting members present to transfer extra load. Sudden increased in Shear force and Bending Moment values indicate increased the strength of Beam to avoid the progressive collapse in a structure. The alternative path method would be one of the best remedies or precaution to overcome the progressive collapses apart from the other methods mentioned by various researchers in the past.