Numerical Modeling of FRP Shear-Strengthened Reinforced Concrete Beams
Publication: Journal of Composites for Construction
Volume 11, Issue 6
Abstract
An attractive technique for the shear strengthening of reinforced concrete beams is to provide additional web reinforcement in the form of externally bonded fiber-reinforced polymer (FRP) sheets. So far, theoretical studies concerning the FRP shear strengthening of reinforced concrete members have been rather limited. Moreover, the numerical analyses presented to date have not effectively simulated the interfacial behavior between the bonded FRP and concrete. The analysis presented here aims to capture the three-dimensional and nonlinear behavior of the concrete, as well as accurately model the bond–slip interfacial behavior. The finite-element model is applied to various strengthening strategies; namely, beams with vertical and inclined side-bonded FRP sheets, U-wrap FRP strengthening configurations, as well as anchored FRP sheets. The proposed numerical analysis is validated against published experimental results. Comparisons between the numerical predictions and test results show excellent agreement. The finite-element model is also shown to be a valuable tool for gaining insight into phenomena (e.g., slip profiles, debonding trends, strain distributions) that are difficult to investigate in laboratory tests.
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Acknowledgments
This research was funded by the Natural Sciences and Engineering Research Council of Canada (NSERC), and the Canadian Network of Centers of Excellence on Intelligent Sensing for Innovative Structures (ISIS Canada). K. W. N. is a Canada Research Chair in Advanced Engineered Material Systems, and the support of this program is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 6 • December 2007
Pages: 640 - 649
Copyright
© 2007 ASCE.
History
Received: Apr 24, 2006
Accepted: Nov 27, 2006
Published online: Dec 1, 2007
Published in print: Dec 2007
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