Concrete damage plasticity model for modeling FRP-to-concrete bond behavior

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    The technique of externally bonding fiber-reinforced polymer (FRP) composites has become very popular worldwide for retrofitting existing reinforced concrete (RC) structures. Debonding of FRP from the concrete substrate is a typical failure mode in such strengthened structures. The bond behavior between FRP and concrete thus plays a crucial role in these structures. The FRP-to-concrete bond behavior has been extensively investigated experimentally, commonly using a single or double shear test of the FRP-to-concrete bonded joint. Comparatively, much less research has been concerned with numerical simulation, chiefly due to difficulties in the accurate modeling of the complex behavior of concrete. This paper presents a simple but robust finite-element (FE) model for simulating the bond behavior in the entire debonding process for the single shear test. A concrete damage plasticity model is proposed to capture the concrete-to-FRP bond behavior. Numerical results are in close agreement with test data, validating the model. In addition to accuracy, the model has two further advantages: it only requires the basic material parameters (i.e., no arbitrary user-defined parameter such as the shear retention factor is required) and it can be directly implemented in the FE software ABAQUS.


    • Concrete Damage Plasticity Model for Modeling FRP-toConcrete Bond Behavior

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      Accepted author manuscript, 860 KB, PDF-document


    Original languageEnglish
    Article number04014026
    Number of pages13
    JournalJournal of Composites for Construction
    Journal publication dateFeb 2015
    Issue number1
    Early online date21 Apr 2014
    Publication statusPublished - Feb 2015

      Research areas

    • Bond, Concrete, Damage, Fiber-reinforced polymer, Finite-element model

    ID: 16571617