Abstract
An accurate local bond-slip model is of fundamental importance in the modelling of FRP-strengthened RC structures. In this paper, a review of existing bond strength models and bond-slip models is first presented. These models are then assessed using the results of 253 pull tests on simple FRP-to-concrete bonded joints, leading to the conclusion that a more accurate model is required. In the second half of the paper, a set of three new bond-slip models of different levels of sophistication is proposed. A unique feature of the present work is that the new bond-slip models are not based on axial strain measurements on the FRP plate; instead, they are based on the predictions of a meso-scale finite element model, with appropriate adjustment to match their predictions with the experimental results for a few key parameters. Through comparisons with the large test database, all three bond-slip models are shown to provide accurate predictions of both the bond strength (i.e. ultimate load) and the strain distribution in the FRP plate.
Original language | English |
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Pages (from-to) | 920-937 |
Number of pages | 18 |
Journal | Engineering Structures |
Volume | 27 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 May 2005 |
Keywords
- Bond
- Bond strength
- Bond-slip models
- Composites
- Concrete
- Finite element simulation
- FRP
- Pull tests
ASJC Scopus subject areas
- Civil and Structural Engineering