Flexural Strengthening of Reinforced Concrete Beams by Mechanically Attaching Fiber-Reinforced Polymer Strips
Publication: Journal of Composites for Construction
Volume 8, Issue 3
Abstract
The current method of bonding fiber-reinforced polymer (FRP) strengthening strips to concrete structures requires extensive time and semiskilled labor. An alternative method is to use a commercial off-the-shelf powder-actuated fastening system to attach FRP strips to concrete. A series of flexural tests were conducted on 15 reinforced concrete beams. Two beams were tested unstrengthened, 12 were strengthened with mechanically fastened FRP strips, and one was strengthened with a bonded FRP strip. The effects of three different strip moduli, different fastener lengths and layouts, and predrilling were examined. Three of the beams strengthened with mechanically attached FRP strips showed strengthening comparable to the beam strengthened with a bonded FRP strip. The same three beams strengthened with mechanically attached FRP strips also showed a greater ductility than the beam strengthened with a bonded FRP strip.
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References
American Concrete Institute (ACI). (1999). Building code requirements for structural concrete (318-99) and commentary (318R-99), Committee 318, Farmington Hills, Mich.
Bank, L. C., Lamanna, A. J., Ray, J. C., and Velazquez, G. I. (2002). “Rapid strengthening of reinforced concrete beams with mechanically fastened, fiber-reinforced polymeric composite strips.” Rep. No. ERDC/GSL TR-02-4, U.S. Army Corps of Engineers Engineer Research and Development Center, Vicksburg, Miss.
Comite Euro-International du Beton (CEB). (1994). Fastenings to concrete and masonry structures, Thomas Telford, London.
Emmons, P. H., Vaysburg, A. M., and Thomas, J.(1998a). “Strengthening of concrete structures. I: Current practice.” Concr. Int., 20(3), 53–58.
Garden, H. N., and Hollaway, L. C.(1998). “An experimental study of the influence of plate end anchorage of carbon fiber composite plates used to strengthen reinforced concrete beams.” Compos. Struct., 42(2), 175–188.
Hussain, M., Sharif, A., Basunbul, I. A., Baluch, M. H., and Al-Sulaimani, G. J.(1995). “Flexural behavior of precracked concrete beams strengthened externally by steel plates.” ACI Struct. J., 92(1), 14–22.
Jones, R., Swamy, R. N., and Charif, A.(1988). “Plate separation and anchorage of reinforced concrete beams strengthened by epoxy-bonded steel plates.” Struct. Eng., 66(5), 85–94.
Lamanna, A. J., Bank, L. C., and Scott, D. W.(2001). “Flexural strengthening of RC beams using fasteners and FRP strips.” ACI Struct. J., 98(3), 368–376.
Lamanna, A. J. (2002). “Flexural strengthening of reinforced concrete beams with mechanically fastened fiber reinforced polymer strips.” PhD dissertation, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, Madison, Wis.
Masterbuilders Inc. (1998) MBrace composite strengthening system: Engineering design guidelines, 2nd Ed., Cleveland, Ohio.
Matthews, F. L., ed. (1987). Joining fibre-reinforced plastics, Elsevier Science, New York.
Sika Corp. (1999). Sika Carbodur structural strengthening system—Engineering guidelines for design and application, Chap. 5, Lyndhurst, N.J.
Spadea, G., Bencardino, F., and Swamy, R. N.(1998). “Structural behavior of composite RC beams with externally bonded CFRP.” J. Compos. Constr., 2(3), 132–137.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 8 • Issue 3 • June 2004
Pages: 203 - 210
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Oct 15, 2002
Accepted: Feb 24, 2003
Published online: May 14, 2004
Published in print: Jun 2004
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