Effect of Transverse Reinforcement on the Flexural Behavior of Continuous Concrete Beams Reinforced with FRP
Publication: Journal of Composites for Construction
Volume 15, Issue 5
Abstract
Continuous concrete beams are structural elements commonly used in structures that might be exposed to extreme weather conditions and the application of deicing salts, such as bridge overpasses and parking garages. In such structures, reinforcing continuous concrete beams with the noncorrodible fiber-reinforced polymer (FRP) bars is beneficial to avoid steel corrosion. However, the linear-elastic behavior of FRP materials makes the ability of continuous beams to redistribute loads and moments questionable. A total of seven full-scale continuous concrete beams were tested to failure. Six beams were reinforced with glass fiber-reinforced polymer (GFRP) longitudinal bars, whereas one was reinforced with steel as control. The specimens have rectangular cross section of and are continuous over two spans of 2,800 mm each. Both steel and GFRP stirrups were used as transverse reinforcement. The material, spacing, and amount of transverse reinforcement were the primary investigated parameters in this study. In addition, the experimental results were compared with the code equations to calculate the ultimate capacity. The experimental results showed that moment redistribution in FRP-reinforced continuous concrete beams is possible and is improved by increasing the amount of transverse reinforcement. Also, beams reinforced with GFRP stirrups illustrated similar performance compared with their steel-reinforced counterparts.
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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 (NSERC), through the Canada Research Chairs program. The equipment funds received from the Canada Foundation for Innovation (CFI) is greatly appreciated. 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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Information & Authors
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Published In
Journal of Composites for Construction
Volume 15 • Issue 5 • October 2011
Pages: 672 - 681
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 8, 2010
Accepted: Mar 11, 2011
Published online: Mar 14, 2011
Published in print: Oct 1, 2011
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