Residual Behavior of Fire-Exposed Reinforced Concrete Beams Prestrengthened in Flexure with Fiber-Reinforced Polymer Sheets
Publication: Journal of Composites for Construction
Volume 12, Issue 1
Abstract
Numerous research studies have shown externally bonded fiber-reinforced polymer (FRP) materials can be used efficiently and economically to repair and retrofit deteriorated or understrength concrete structures. FRP materials are being widely applied in the rehabilitation of deteriorated bridges, however, their use in buildings has been limited, partly because of insufficient knowledge about the performance of FRP materials in fire. To enable further applications of FRPs in buildings, this paper presents a study on the residual performance after fire of four reinforced-concrete (RC) T-beams that were prestrengthened with externally bonded FRP sheets and provided with a supplemental fire protection system. Results from this study suggest that the RC beams strengthened with FRPs prior to fire exposure retained most of their initial unstrengthened flexural capacity after fire. This is attributed to the fact that the temperature of the internal concrete and reinforcing steel was kept to below 200 and , respectively.
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Acknowledgments
The writers are members of the Intelligent Sensing for Innovative Structures Network (ISIS Canada) and wish to acknowledge the support of the Networks of Centres of Excellence Program of the Government of Canada and the Natural Sciences and Engineering Research Council of Canada. The writers would also like to acknowledge the technical staff at Queen’s University and the National Research Council of Canada; Dr. B. Williams, Pre-Con; as well as Fyfe Company LLC and Degussa Building Systems for providing financial support, specialized protection materials, and technical expertise.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 1 • February 2008
Pages: 61 - 68
Copyright
© 2008 ASCE.
History
Received: Aug 17, 2006
Accepted: Dec 22, 2006
Published online: Feb 1, 2008
Published in print: Feb 2008
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