Prediction of Blast Loading and Its Effects on Waffle Slab
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 5
Abstract
Explosions are occurring in recent days which cause total destruction of structure. Blast explosions caused due to gas leakage, bomb attacks, terrorist attack, nuclear explosions etc. Studies were conducted on the behaviour of structural concrete subjected to blast loads. These studies gradually enhanced the understanding of the role that structural details play in affecting the behaviour. The blast load expands as a high heat shock wave with high strength and velocity for a short duration. The strength and velocity of wave decays with increase in distance and time. The RC structures designed are without considering the blast load which result in large dynamic loads, greater than the original design loads, of many structures. The response of waffle slab subjected blast loads was examined. Waffle slabs are commonly used for car parking .It is a slab which can span larger distance using ribs without intermediate columns. In the analysis waffle slab with steel girders are used for analysis. The effect of blast loading by varying the distance of detonation and weight of TNT were analysed. The finite element package ANSYS was used to model waffle slab with boundary conditions. The mitigation effect over the slab also examined by using the aluminium foam sheet and carbon fiber reinforced polymer sheet. Results indicate that the CFRP is effective in mitigation of blast load than aluminium foam. The spalling of concrete and rupture of reinforcement of slab occur during the blast loading with decrease in distance of detonation.
Authors and Affiliations
Vijitha. N. K, Ammu Baby Paul, Ahani. R
Keywords
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