Shear Strength of Fiber-Reinforced Polymer Reinforced Concrete Beams Subject to Unsymmetric Loading
Publication: Journal of Composites for Construction
Volume 15, Issue 4
Abstract
This study is concerned with the determination of the effects of shear span-to-depth ratio () and beam depth, or size, on the concrete contribution to the shear resistance of beams longitudinally reinforced with carbon fiber-reinforced polymer (CFRP) bars. One of the distinguishing features of the study is the unsymmetrical nature of the applied load, which creates two distinct ratios in the same beam and allows the effect of the ratio on shear strength to be clearly seen. Six simply supported large size CFRP reinforced concrete beams without shear reinforcement were tested, each under a single concentrated load. The test variables were the ratio, varying from 1.0–11.5, and the beam depth varying from 200–500 mm. All the beams failed in shear, but the failure load and location for some of these beams could not be predicted by the shear design recommendations of American Concrete Institute (ACI) Committee 440. The reason is that these recommendations do not account for the effects of and beam size on shear strength. Suggestions are made for the inclusion of these parameters in the shear design equations.
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Acknowledgments
The authors would like to thank undergraduate students Meaghan Henry, Mehdi Ebrahimpour, Alain-Philippe Beauger, and Alessandro Qualizza at Carleton University for their assistance with the construction and testing of the beams in this investigation.
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Information & Authors
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Published In
Journal of Composites for Construction
Volume 15 • Issue 4 • August 2011
Pages: 500 - 512
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 18, 2010
Published online: Oct 1, 2010
Accepted: Oct 19, 2010
Published in print: Aug 1, 2011
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