Shear Strength of GFRP-Reinforced Concrete Continuous Beams with Minimum Transverse Reinforcement
Publication: Journal of Composites for Construction
Volume 18, Issue 1
Abstract
This paper investigates the shear behavior of continuous concrete beams reinforced with glass fiber–reinforced polymer (GFRP) bars and stirrups. A total of six beams, with rectangular cross section and continuous over two spans of 2,800 mm each, were constructed and tested. Three main variables, namely, concrete strength, longitudinal reinforcement ratio, and transverse shear-reinforcement ratio, were investigated. Two beams were without transverse reinforcement to evaluate the concrete contribution to the shear strength and four beams had GFRP stirrups to examine the minimum shear-reinforcement contribution to the shear strength. All test specimens were designed to satisfy an assumed 20% moment redistribution. It was observed that all test specimens failed in shear near the interior support after significant moment redistribution from hogging moment to sagging moment regions. In addition, the test results were compared with the predictions of the CSA-S806-12, CSA-S6-06, and ACI 440.1R-06.
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Acknowledgments
The authors wish to express their gratitude and sincere appreciation for the financial support received from the Natural Science and Engineering Research Council of Canada, through Canada Research Chairs program. The help received from the technical staff of the McQuade Heavy Structural Laboratory in the Department of Civil Engineering at the University of Manitoba is also acknowledged.
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Published In
Journal of Composites for Construction
Volume 18 • Issue 1 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 8, 2013
Accepted: Jun 21, 2013
Published online: Jun 24, 2013
Published in print: Feb 1, 2014
Discussion open until: Feb 28, 2014
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