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Simulation of Reinforced Concrete Slabs in Residential Buildings Under Internal Gas Blast

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Abstract

Blast loading is associated with relatively short duration and high amplitude of forces, which when comes in contact with the reinforced concrete (RC) slabs results in the strong vibrations that yields high internal stresses and relatively larger deflections within the slabs. In this study, behaviour of a typical residential RC slab, when subjected to indoor confined blast, was investigated numerically using the conventional weapons (CONWEP) model available in the finite element software ABAQUS. For this purpose, the blast effect produced due to the gas leakage in a pipe was considered for studying the influence of different parameters which include concrete compressive strength, thickness of the slab, reinforcement ratio and spacing, the standoff distance and the boundary conditions of the RC slab. It was observed that the behaviour of the RC slabs, when subjected to blast loading, significantly differ from that observed under static loading as the latter was found to be associated with the overall bending of the slab, whereas for the case of blast loading the behaviour is characterized by both local damage in the direct contact zone of the slab and detonation and overall bending response. Maximum deflections were found to be more affected by concrete compressive strength, slab thickness and standoff distance. A relationship was proposed for the estimation of central deflection which correlates well with the values obtained from nonlinear FE analysis.

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Acknowledgements

Support provided by the Department of Civil Engineering, NED University of Engineering & Technology, Karachi, Pakistan, is duly acknowledged by the authors in the pursuit of this work.

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Authors and Affiliations

  1. Department of Civil Engineering, NED University of Engineering & Technology, Karachi, 75270, Pakistan

    Shamsoon Fareed, Juwairia Asad & Asad-ur-Rehman Khan

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  1. Shamsoon Fareed
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  2. Juwairia Asad
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  3. Asad-ur-Rehman Khan
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Correspondence to Asad-ur-Rehman Khan.

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Fareed, S., Asad, J. & Khan, AuR. Simulation of Reinforced Concrete Slabs in Residential Buildings Under Internal Gas Blast. Arab J Sci Eng (2024). https://doi.org/10.1007/s13369-024-09100-8

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