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.

    Documents

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

      Rights statement: © 2014 American Society of Civil Engineers This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at http://ascelibrary.org/doi/10.1061/%28ASCE%29CC.1943-5614.0000482

      Accepted author manuscript, 860 KB, PDF-document

    DOI

    Original languageEnglish
    Article number04014026
    Number of pages13
    JournalJournal of Composites for Construction
    Journal publication dateFeb 2015
    Issue number1
    Volume19
    Early online date21 Apr 2014
    DOIs
    Publication statusPublished - Feb 2015

      Research areas

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

    ID: 16571617