Shear Resistance of FRP RC Beams: Experimental Study
Publication: Journal of Composites for Construction
Volume 10, Issue 6
Abstract
This study investigates the shear behavior of concrete beams reinforced with fiber-reinforced polymer (FRP) reinforcement. Six beams were subjected to two successive phases of testing. Half of the beams were reinforced in flexure with conventional steel reinforcement, while the other half were reinforced with glass fiber bars. Different shear span to depth ratios, ranging from 1.1 to 3.3, were analyzed in order to study the variation in the shear behavior of beams characterized by different types of shear failure. No shear reinforcement was provided in the first phase of testing, while in the second phase, just enough glass and carbon shear reinforcement was provided to enable failure due to shear. The results of these tests are presented and compared to predictions according to the design recommendations proposed by the ACI and the Institution of Structural Engineers, U.K. The results of this study show that these approaches, which are based on modifications of equations derived for steel reinforcement, underestimate the contribution of the concrete and the shear reinforcement to the total shear capacity of FRP RC beams. It is shown that both approaches can be modified to become less conservative.
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Acknowledgments
This research project would have not been possible without the financial support of the European Commission, which funded the TMR Network “ConFibreCrete” and the Marie Curie RTN “EN-CORE.”
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Published In
Journal of Composites for Construction
Volume 10 • Issue 6 • December 2006
Pages: 464 - 473
Copyright
© 2006 ASCE.
History
Received: Apr 12, 2005
Accepted: Nov 23, 2005
Published online: Dec 1, 2006
Published in print: Dec 2006
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