Structural Engineering and Mechanics

  • 제66권4호
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  • Pages.543-555
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  • 2018
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Debonding failure analysis of prestressed FRP strengthened RC beams

  • Hoque, Nusrat (Department of Civil Engineering, University Malaya, Jalan University) ;
  • Jumaat, Mohd Z. (Department of Civil Engineering, University Malaya)
  • 투고 : 2016.09.17
  • 심사 : 2018.03.09
  • 발행 : 2018.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

Fiber Reinforced Polymer (FRP), which has a high strength to weight ratio, are now regularly used for strengthening of deficient reinforced concrete (RC) structures. While various researches have been conducted on FRP strengthening, an area that still requires attention is predicting the debonding failure load of prestressed FRP strengthened RC beams. Application of prestressing increases the capacity and reduces the premature failure of the beams largely, though not entirely. Few analytical methods are available to predict the failure loads under flexure failure. With this paucity, this research proposes a method for predicting debonding failure induced by intermediate crack (IC) for prestressed FRP-strengthened beams. The method consists of a numerical study on beams retrofitted with prestressed FRP in the tension side of the beam. The method applies modified Branson moment-curvature analysis together with the global energy balance approach in combination with fracture mechanics criteria to predict failure load for complicated IC-induced failure. The numerically simulated results were compared with published experimental data and the average of theoretical to experimental debonding failure load is found to be 0.93 with a standard deviation of 0.09.

키워드

과제정보

연구 과제번호 : Strengthening Structural Elements for Load and Fatigue

연구 과제 주관 기관 : The University of Malaya-Malaysia

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