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Blast Response of Cracked Reinforced Concrete Slabs Repaired with CFRP Composite Patch

  • Structural Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

In the present study, a numerical model is developed for investigating the capacity of the Carbon Fiber Reinforced Polymer (CFRP) patch to improve the blast response of cracked reinforced concrete (RC) slab. The model uses a finite element method adopted by LS-DYNA. To achieve this aim, a 3D nonlinear Finite-element (FE) model is developed to study the blast resistance of cracked RC slab with and without external reinforcement by CFRP. After model validation, the blast response of the cracked RC slabs with several different crack parameters (e.g. orientation, width and depth) under the blast loading is firstly studied. Then to improve the blast resistance, the cracked RC slabs are stiffened by CFRP composite patches. Numerical results show that the repaired patches can significantly reduce the mid-span deflection and improve the damage distribution of the cracked RC slab. The CFRP is proved to be a valid solution for repairing of cracked RC slab and can increase the blast resistance of RC structures under blast loading. Finally, a parametric analysis is further conducted to investigate the influences of the layer number and layer size of the CFRP patch on the blast resistance of the retrofitted model.

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Authors and Affiliations

  1. Dept. of Civil & Architectural Engineering, Liaoning University of Technology, Jinzhou, 121001, China

    X. Q. Kong, Q. Zhao, Y. D. Qu & W. J. Zhang

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  1. X. Q. Kong
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  2. Q. Zhao
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  3. Y. D. Qu
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  4. W. J. Zhang
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Correspondence to X. Q. Kong.

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Kong, X.Q., Zhao, Q., Qu, Y.D. et al. Blast Response of Cracked Reinforced Concrete Slabs Repaired with CFRP Composite Patch. KSCE J Civ Eng 22, 1214–1224 (2018). https://doi.org/10.1007/s12205-017-1054-3

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  • DOI: https://doi.org/10.1007/s12205-017-1054-3

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