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Whole-process Bond Characteristics of FRP-to-concrete Joint under Pressure

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

Abstract

Lateral anchoring can effectively inhibit the premature debonding of FRP (Fiber-Reinforced Polymer) plate bonds to concrete. To effectively improve the efficiency of reinforcement, the bond characteristics of FRP-to-concrete joints under pressure through the entire debonding process were analyzed via a theoretical model, experimental evaluation, and parameter studies. The results show that the load-slip behavior of a bonded joint features an elastic stage, an elastic-softening stage, an elastic-softening-residual stage, a softening-residual stage and a residual stage. Moreover, the trilinear bond-slip model reveals changes in interface bonding properties under pressure. The experimental analysis of the load-slip relationship and bond stress distribution prove the accuracy of the theoretical model. Both load capacity and slip increase with increasing bond length or lateral pressure, while increasing the plate stiffness results in an increased load capacity and a reduction in ductility.

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Authors and Affiliations

  1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, 250061, China

    Lei Gao, Feng Zhang, Jia-qi Liu & Xiao-rui Lu

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  1. Lei Gao
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  2. Feng Zhang
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  3. Jia-qi Liu
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  4. Xiao-rui Lu
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Correspondence to Feng Zhang.

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Gao, L., Zhang, F., Liu, Jq. et al. Whole-process Bond Characteristics of FRP-to-concrete Joint under Pressure. KSCE J Civ Eng 22, 5114–5122 (2018). https://doi.org/10.1007/s12205-018-0177-5

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  • DOI: https://doi.org/10.1007/s12205-018-0177-5

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