Flexural Fatigue Behavior of Reinforced Concrete Beams Strengthened with FRP Fabric and Precured Laminate Systems
Publication: Journal of Composites for Construction
Volume 10, Issue 5
Abstract
Rehabilitation of existing structures with carbon fiber reinforced polymers (CFRP) has been growing in popularity because they offer resistance to corrosion and a high stiffness-to-weight ratio. This paper presents the flexural strengthening of seven reinforced concrete (RC) beams with two FRP systems. Two beams were maintained as unstrengthened control samples. Three of the RC beams were strengthened with CFRP fabrics, whereas the remaining two were strengthened using FRP precured laminates. Glass fiber anchor spikes were applied in one of the CFRP fabric strengthened beams. One of the FRP precured laminate strengthened beams was bonded with epoxy adhesive and the other one was attached by using mechanical fasteners. Five of the beams were tested under fatigue loading for two million cycles. All of the beams survived fatigue testing. The results showed that use of anchor spikes in fabric strengthening increase ultimate strength, and mechanical fasteners can be an alternative to epoxy bonded precured laminate systems.
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Acknowledgments
The writers wish to express their gratitude and sincere appreciation to the authority of Federal Highway Administration (FHwA) and the Center for Infrastructure Engineering Studies (CIES) at the University of Missouri-Rolla (UMR) for supporting this research study. They would like to thank Larry Bank from the University of Wisconsin and Nestore Galati and Jason Cox for their contribution to this research. The authors would also like to acknowledge Nathan Marshall and Jared Brewe for their effort as undergraduate research assistants.
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© 2006 ASCE.
History
Received: Aug 31, 2004
Accepted: Sep 14, 2005
Published online: Oct 1, 2006
Published in print: Oct 2006
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