Abstract
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.
Original language | English |
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Article number | 04014026 |
Number of pages | 13 |
Journal | Journal of Composites for Construction |
Volume | 19 |
Issue number | 1 |
Early online date | 21 Apr 2014 |
DOIs | |
Publication status | Published - Feb 2015 |
Keywords
- Bond
- Concrete
- Damage
- Fiber-reinforced polymer
- Finite-element model
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Ceramics and Composites
- Mechanical Engineering
- Mechanics of Materials