Evaluation of Fire Endurance of Concrete Slabs Reinforced with Fiber-Reinforced Polymer Bars
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VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 131, Issue 1
Abstract
One of the major safety requirements in the design of buildings is the provision of appropriate fire endurance of structural members. To assess and develop information on the fire endurance of fiber-reinforced polymer (FRP) reinforced concrete structural members, a numerical model was applied to the analysis of FRP-reinforced concrete slabs. The computer program was validated against data obtained from fire endurance tests on concrete slabs reinforced with steel or FRP bars. Parametric studies were carried out to investigate the effect of a range of parameters on the fire performance of FRP-reinforced concrete slabs. Results of the parametric studies show that FRP-reinforced concrete slabs have lower fire resistance than slabs reinforced with conventional reinforcing steel when fire endurance is defined in terms of the critical temperature of the reinforcement. In this context the main factors that influence the fire resistance of FRP-reinforced concrete slabs are: the concrete cover thickness, type of reinforcement, and the type of aggregate in the concrete. A higher fire resistance for FRP-reinforced concrete slabs can be obtained through greater concrete cover thickness and through the use of carbonate aggregate concrete. Based on the parametric studies, a series of simple design charts is presented that can be used to evaluate the fire endurance of FRP-reinforced concrete slabs.
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Acknowledgments
The study presented in this paper is part of a joint research project between NRC and Public Works and Government Services of Canada (PWGSC). The writers appreciate the technical and financial contributions of PWGSC. They would also like to thank Patrice Leroux for his assistance in carrying out the fire tests described briefly herein.
References
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Received: Jul 25, 2003
Accepted: Apr 14, 2004
Published online: Jan 1, 2005
Published in print: Jan 2005
Notes
Note. Associate Editor: Peter W. Hoadley
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