A REVIEW ON STUDY OF MULTISTORY BUILDING SUBJECTED TO BLAST LOADS

Civil Engineering

The investigation and design of structures when exposed to explosion loads require an understanding of the air explosion phenomenon and the dynamic response of structure. Analysis of structures exposed to blast loading is difficult because the uniform transient loads produced by the nearby detonation, combined with the localized structural response results in an extremely complex structural analysis problem. Failure of one important member in the locality of the source of the blast, may generate critical stress redistribution and lead to failure of other members, and ultimately the entire structure. In this article an attempt is made to analyze a G+4 multistoried symmetrical building which is subjected to blast loading. A comparative analysis is given when the structure is fitted with X bracings, diagonal bracings. For the analysis ETABS is used along with RC Blast software. A case study is to be perform in unsymmetrical building taking the reference of our college AIET Main Building with G+4. A comparative analysis is given when the structures are fitted with different types of bracings. The plan of the building is to be drawn using AutoCAD and for the analysis ETABS is used along with RC Blast software. Computation of blast loading for G+4 storied framed building has been carried out for different cases, in which one is Normal G+4 storey building, X-Braced type building, Diagonal type braced building i.e inclination along X and Y direction. The buildings are considered as per IS Code 4991:1968 for blast resistant designing purposes. In all the cases the equivalent SEMTEX charge weight W has been taken as 50 kg and the actual effective distance from explosion R is taken as 10 m.

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