Experimental Study of RC Beams Strengthened with Prestressed Steel-Wire BFRP Composite Plate Using a Hybrid Anchorage System
Publication: Journal of Composites for Construction
Volume 19, Issue 2
Abstract
Steel wire-basalt fiber reinforced polymer (BFRP) composite plate (SBFCP) is a newly developed plate for strengthening reinforced concrete (RC) structures with both high performance and economy. This paper presents a prestress technique for flexural strengthening RC beams using SBFCPs after investigating mechanical properties of SBFCPs. To achieve higher levels of fiber strength utilization prior to premature debonding failure, a new hybrid anchoring approach that combines adhesive bonding and mechanical fastening is proposed. Six T-beams with 6 m length were tested under four-point bending. The main variable parameters were the composite plate types and prestress levels. The test results demonstrate that the use of SBFCPs for strengthening RC beams is an effective method for improving the flexural performance. Moreover, in comparison with nonprestressed one, prestressed SBFCP technology can further improve the cracking load and overall stiffness with less strain lag, better bonding, and better utilization efficiency of the strengthening material. In comparison with specimens strengthened with carbon-fiber-reinforced polymer materials, prestressed SBFCP technology also has competitive advantages, particularly with respect to their serviceability and performance-cost ratio.
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Acknowledgments
This research was financially supported by the National Basic Research Program of China (Grant no: 2012CB026200), the National Twelfth Five-Year Plan for Science and Technology (Grant no: 2011BAB03B09, 2012BAK24B03), the Natural Science Foundation of Jiangsu Province, China (Grant no: BK2010015), and the Priority Academic Program Development of Jiangsu High Education Institutions (PAPD). Support from these sources is gratefully acknowledged. The authors would like to express their gratitude to Dr. Rudi Seracino at North Carolina State University for language editing and technical discussions.
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Published In
Journal of Composites for Construction
Volume 19 • Issue 2 • April 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 31, 2013
Accepted: May 9, 2014
Published online: Jul 14, 2014
Discussion open until: Dec 14, 2014
Published in print: Apr 1, 2015
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