Shear Behavior of FRP-Reinforced Concrete Deep Beams without Web Reinforcement
Publication: Journal of Composites for Construction
Volume 17, Issue 6
Abstract
The shear behavior of four full-scale deep beams reinforced with carbon and glass fiber reinforced polymer (FRP) bars were investigated. The beams were supported over a 3,000-mm span with a projection of 1,000 mm on each side, with a cross section of 300 mm in width and 1,200 mm in depth, and tested to failure under four-point loading. The primary test variables included the longitudinal reinforcement ratio and the reinforcement type. The reinforcement ratio and concrete compressive strength had a clear effect on the ultimate capacity and deflection characteristics while reinforcement type no clear effect of the behavior of the tested beams. The crack patterns, mode of failure, and strains in concrete and reinforcement were also reported. The formation of the tie action was confirmed by the nearly uniform strain distribution in the longitudinal reinforcement. The results are compared to the strut-and-tie model, demonstrating the necessity of including the effect of web reinforcement and the importance of considering the effect of axial stiffness on longitudinal reinforcement.
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Acknowledgments
The authors would like to express their special thanks and gratitude to the Natural Science and Engineering Research Council of Canada (NSERC), the Fonds québécois de la recherche sur la nature et les technologies (FQRNT), and the technical staff of the structural lab in the Department of Civil Engineering at the University of Sherbrooke.
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Published In
Journal of Composites for Construction
Volume 17 • Issue 6 • December 2013
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 13, 2012
Accepted: Apr 11, 2013
Published online: Apr 13, 2013
Published in print: Dec 1, 2013
Discussion open until: Feb 23, 2014
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