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Strengthening of Fibre Reinforced Concrete Elements: Synergy of the Fibres and External Sheet

Author

Listed:
  • Viktor Gribniak

    (Vilnius Gediminas Technical University (VGTU), Sauletekio Av. 11, 10223 Vilnius, Lithuania)

  • Pui-Lam Ng

    (Vilnius Gediminas Technical University (VGTU), Sauletekio Av. 11, 10223 Vilnius, Lithuania
    Department of Civil Engineering, The University of Hong Kong, Pokfulam 999077, Hong Kong, China)

  • Vytautas Tamulenas

    (Vilnius Gediminas Technical University (VGTU), Sauletekio Av. 11, 10223 Vilnius, Lithuania)

  • Ieva Misiūnaitė

    (Vilnius Gediminas Technical University (VGTU), Sauletekio Av. 11, 10223 Vilnius, Lithuania)

  • Arnoldas Norkus

    (Vilnius Gediminas Technical University (VGTU), Sauletekio Av. 11, 10223 Vilnius, Lithuania)

  • Antanas Šapalas

    (Vilnius Gediminas Technical University (VGTU), Sauletekio Av. 11, 10223 Vilnius, Lithuania)

Abstract

In structural rehabilitation and strengthening, the structural members are often required to cope with larger design loading due to the upgrading of building services and design standard, while maintaining the member size to preserve the architectural dimensions and headroom. Moreover, durability enhancement by mitigating or eliminating the reinforcement corrosion problem is often desired. Concrete cracking is a major initiating and accelerating factor of the corrosion of steel reinforcement. The application of fibres is a prominent solution to the cracking problem. Furthermore, the fibres can increase the mechanical resistance of the strengthening systems. This study reveals the synergy effect of the combined application of steel fibres and external carbon fibre-reinforced polymer (CFRP) sheets. The investigation encompasses the use of fibre-reinforced polymer (FRP) reinforcing bars, discrete steel fibres, externally bonded and mechanically fastened FRP sheets in different combinations. It is discovered that the steel fibres can help to control concrete cracking and eventually alter the failure mode and enhance the flexural resistance. The FRP reinforcement system, together with the steel fibres, radically resolves the structural safety problem caused by corrosion of the steel bar reinforcement. Finally, the impact of the external sheet on the fire limit state performance needs to be resolved, such as by adopting fire protection rendering for the finishes layer.

Suggested Citation

  • Viktor Gribniak & Pui-Lam Ng & Vytautas Tamulenas & Ieva Misiūnaitė & Arnoldas Norkus & Antanas Šapalas, 2019. "Strengthening of Fibre Reinforced Concrete Elements: Synergy of the Fibres and External Sheet," Sustainability, MDPI, vol. 11(16), pages 1-13, August.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:16:p:4456-:d:258546
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    References listed on IDEAS

    as
    1. Ying Zhou & Yi Xiao & Anqi Gu & Zheng Lu, 2018. "Dispersion, Workability and Mechanical Properties of Different Steel-Microfiber-Reinforced Concretes with Low Fiber Content," Sustainability, MDPI, vol. 10(7), pages 1-17, July.
    2. Wei-Ling Hsu & Chen-Chung Liu & Yan-Chyuan Shiau & Wen-Chin Lin, 2019. "Discussion on the Reinforcement of Reinforced Concrete Slab Structures," Sustainability, MDPI, vol. 11(6), pages 1-15, March.
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