Fatigue Life Evaluation of Concrete Bridge Deck Slabs Reinforced with Glass FRP Composite Bars
Publication: Journal of Composites for Construction
Volume 11, Issue 3
Abstract
Since bridge deck slabs directly sustain repeated moving wheel loads, they are one of the most bridge elements susceptible to fatigue failure. Recently, glass fiber-reinforced polymer (FRP) composites have been widely used as internal reinforcement for concrete bridge deck slabs as they are less expensive compared to the other kinds of FRPs (carbon and aramid). However, there is still a lack of information on the performance of FRP–reinforced concrete elements subjected to cyclic fatigue loading. This research is designed to investigate the fatigue behavior and fatigue life of concrete bridge deck slabs reinforced with glass FRP bars. A total of five full-scale deck slabs were constructed and tested under concentrated cyclic loading until failure. Different reinforcement types (steel and glass FRP), ratios, and configurations were used. Different schemes of cyclic loading (accelerated variable amplitude fatigue loading) were applied. Results are presented in terms of deflections, strains in concrete and FRP bars, and crack widths at different levels of cyclic loading. The results showed the superior fatigue performance and longer fatigue life of concrete bridge deck slabs reinforced with glass FRP composite bars.
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Acknowledgments
The writers wish to extend special thanks to the following organizations for their contribution to this research: The Ministry of Transportation of Quebec, Pultrall Inc., the Natural Science and Engineering Research Council of Canada (NSERC), and ISIS-Canada (Network of Centers of Excellence) are greatly acknowledged for partial funding.
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© 2007 ASCE.
History
Received: Mar 2, 2006
Accepted: May 26, 2006
Published online: Jun 1, 2007
Published in print: Jun 2007
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