Steel and Composite Structures

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Load carrying capacity of CFRP retrofitted broken concrete arch

  • Wang, Peng (State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology) ;
  • Jiang, Meirong (State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology) ;
  • Chen, Hailong (State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology) ;
  • Jin, Fengnian (State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology) ;
  • Zhou, Jiannan (State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology) ;
  • Zheng, Qing (State Key Laboratory of Constructional Machinery, Zoomlion Heavy Industry Science & Technology Co., Ltd.) ;
  • Fan, Hualin (Research Center of Lightweight Structures and Intelligent Manufacturing, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics)
  • Received : 2016.07.10
  • Accepted : 2017.01.17
  • Published : 2017.02.10
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Abstract

To reuse a broken plain concrete (PC) arch, a retrofitting method was proposed to ensure excellent structural performances, in which carbon fiber reinforced polymers (CFRPs) were applied to repair and strengthen the damaged PC arch through bonding and wrapping techniques. Experiments were carried out to reveal the deformation and the load carrying capacity of the retrofitted composite arch. Based on the experiments, repairing and strengthening effects of the CFRP retrofitted broken arch were revealed. Simplified analysing model was suggested to predict the peak load of the CFRP retrofitted broken arch. According to the research, it is confirmed that absolutely broken PC arch can be completely repaired and reinforced, and even behaves more excellent than the intact PC arch when bonded together and strengthened with CFRP sheets. Using CFRP bonding/wrapping technique a novel efficient composite PC arch structure can be constructed, the comparison between rebar reinforced concrete (RC) arch and composite PC arch reveals that CFRP reinforcements can replace the function of steel bars in concrete arch.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Natural Science Foundations of Jiangsu Province, State Key Laboratory of Mechanics and Control of Mechanical Structures

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  2. Static and Dynamic Performances of Concrete-Filled Braided CFRP Tubular Protective Structures vol.18, pp.9, 2020, https://doi.org/10.3151/jact.18.532
  3. Wrapping and anchoring effects on CFRP strengthened reinforced concrete arches subjected to blast loads vol.22, pp.4, 2017, https://doi.org/10.1002/suco.202000394