Flexural Strengthening of RC Beams with Prestressed CFRP Sheets: Using Nonmetallic Anchor Systems
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Volume 12, Issue 1
Abstract
This paper presents the flexural behavior of reinforced concrete beams strengthened with prestressed carbon fiber-reinforced polymer (CFRP) sheets using nonmetallic anchor systems. The developed nonmetallic anchor systems replace the permanent steel anchorage. Nine doubly reinforced concrete beams are tested with various types of nonmetallic anchor systems such as nonanchored U-wraps, mechanically anchored U-wraps, and CFRP sheet-anchored U-wraps. The flexural behavior of the tested beams, including detailed failure modes of each nonmetallic anchor system, is investigated. The study shows that the developed nonmetallic anchors are more effective in resisting peeling-off cracks compared to the permanent steel anchors and the beams strengthened with the nonmetallic anchors provide comparable load-carrying capacity with respect to the steel anchored control beam.
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Acknowledgments
The writers wish to acknowledge the support of the Department of National Defence (DND) of Canada through the Military Engineering Research Group (MERG) at the Royal Military College of Canada (RMC), and the financial support of Intelligent Sensing for Innovative Structures Network (ISIS Canada), the Natural Sciences and Engineering Research Council of Canada (NSERC), and Queen’s University. The contribution of the RMC technical staff is greatly appreciated as well.
References
American Concrete Institute (ACI). (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI 440.2R-02, ACI Committee 440, Farmington Hills, Mich.
Bakis, C. E., Bank, L. C., Brown, V. L., Cosenza, E., Davalos, J. F., Lesko, J. J., Machida, A., Rizkalla, S. H., and Triantafillou, T. C. (2002). “Fiber-reinforced polymer composites for construction-state-of-the-art review.” J. Compos. Constr., 6(2), 73–87.
El-Hacha, R., Wight, R. G., and Green, M. F. (2004). “Prestressed carbon fiber-reinforced polymer sheets for strengthening concrete beams at room and low temperatures.” J. Compos. Constr., 8(1), 3–13.
Hollaway, L. C., and Leeming, M. B. (1999). Strengthening of reinforced concrete structures: Using externally-bonded FRP composites in structural and civil engineering, Woodhead Publishing Limited, Cambridge, U.K.
Kim, Y. J. (2006). “Strengthening concrete structures with prestressed CFRP sheets: Laboratory and numerical investigations to field application.” Ph.D. thesis, Queen’s University, Kingston, Ont., Canada.
Kim, Y. J., Bizindavyi, L., and Green, M. F. (2004). “Applicability of steel anchor plates for prestressing multilayered CFRP sheets.” 4th Int. Conf. on Advanced Composite Materials in Bridges and Structures (ACMBS-IV) (CD-ROM), CSCE, Calgary, Alta., Canada.
Kim, Y. J., Bizindavyi, L., Wight, R. G., and Green, M. F. (2005). “Anchoring techniques for strengthening reinforced concrete beams with prestressed CFRP sheets.” 3rd Int. Conf. on Construction Materials (ConMat 05) (CD-ROM), CSCE, Vancouver, B.C., Canada.
Kim, Y. J., Green, M. F., Fallis, G. J., Wight, G. R., and Eden, R. (2006). “Damaged bridge girder strengthening: Field application of prestressed fiber-reinforced polymer sheets.” Concr. Int., 28(11), 47–52.
Kim, Y. J., Wight, R. G., and Green, M. F. (2008). “Flexural strengthening for RC beams with prestressed CFRP sheets: Development of nonmetallic anchor systems.” J. Compos. Constr., 12(1), 35–43.
Meier, U. (1995). “Strengthening of structures using carbon fibre/epoxy composites.” Constr. Build. Mater., 9(6), 341–351.
Stoecklin, I., and Meier, U. (2003). “Strengthening of concrete structures with prestressed and gradually anchored CFRP strips.” 6th Int. Conf. on Fiber Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-6), Singapore, 1321–1330.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2003). “Behaviour and strength of FRP-strengthened RC structures: A state-of the art review.” Proc. Inst. Civ. Eng., Struct. Build., 156(1), 51–62.
Triantafillou, T. C., Deskovic, N., and Deurinig, M. (1992). “Strengthening of concrete structures with prestressed fiber reinforced plastic sheets.” ACI Struct. J., 89(3), 235–244.
Wight, R. G., Green, M. F., and Erki, M.-A. (2001). “Prestressed FRP sheets for poststrengthening reinforced concrete beams.” J. Compos. Constr., 5(4), 214–220.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 1 • February 2008
Pages: 44 - 52
Copyright
© 2008 ASCE.
History
Received: Jul 27, 2006
Accepted: Nov 2, 2006
Published online: Feb 1, 2008
Published in print: Feb 2008
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