RC Beams Strengthened with GFRP Plates. I: Experimental Study
Publication: Journal of Structural Engineering
Volume 117, Issue 11
Abstract
The static strength of reinforced concrete beams strengthened by gluing glass‐fiber‐reinforced‐plastic (GFRP) plates to their tension flanges is experimentally investigated. Five rectangular beams and one T‐beam were tested to failure under four‐point bending. The measured load versus strain in GFRP plate, steel rebar, extreme compression fiber of concrete, and the load versus deflection for the section at midspan of the beams are plotted and compared to the predicted values. The results indicate that the flexural strength of RC beams can be significantly increased by gluing GFRP plates to the tension face. In addition, the epoxy bonded plates improved the cracking behavior of the beams by delaying the formation of visible cracks and reducing crack widths at higher load levels.
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References
1.
An, W., Saadatmanesh, H., and Ehsani, M. R. (1991). “R/C beams strengthened with FRP plate. II: Analysis and parametric study.” J. Struct. Engrg., ASCE, 117(11).
2.
“Araldit for a bridge: Bonded reinforcing instead of replacement.” (1979). Ciba‐Geigy, Aspekte, Switzerland, 4, 2–4.
3.
Dussek, I. J. (1980). “Strengthening of bridge beams and similar structures by means of epoxy‐resin‐bonded external reinforcement.” Transport. Res. Rec. 785, Transportation Research Board, 21–24.
4.
“Highway bridge replacement and rehabilitation program.” (1989). 10th Annual Report of the Secretary of Transportation to the Congress of the United States, Bridge Division, Office of Engineering, Federal Highway Administration, Washington, D.C.
5.
Hoskin, C. B., and Baker, A. A. (1986). Composite materials for aircraft structures. AIAA Education Series, American Institute of Aeronautics and Astronautics, Inc., New York, N.Y.
6.
Klaiber, F. W., Dunker, K. F., and Sanders, W. W. (1982). “Strengthening of single‐span steel beam bridges.” J. Struct. Engrg., ASCE, 108(12), 2766–2780.
7.
Klaiber, F. W., Dunker, K. F., Wipf, T. J., and Sanders, W. W., Jr. (1987). “Methods of strengthening existing highway bridges.” Report No. 293, National Cooperative Highway Research Program.
8.
Lloyd, G. D., and Calder, A. J. J. (1982). “The microstructure of epoxy bonded steel‐to‐concrete joints.” Supplemental Report No. 705, Transport and Road Research Laboratory, Structures Department, Bridge Division, Crowthorne, Berkshire, England.
9.
MacDonald, M. D., and Calder, A. J. J. (1982), “Bonded steel plating for strengthening concrete structures.” Int. J. Adhes. Adhes., 2(2), 119–127.
10.
Pleimann, L. G. (1987). Tension and bond pull‐out tests of deformed fiberglass rods. Vega Technologies, Marshal, Ark.
11.
Raithby, K. D. (1980). “External strengthening of concrete bridges with bonded steel plates.” Report No. SR 612, Department of Transportation, Transport and Road Research Laboratory, Crowthorne, Berkshire, England.
12.
Saadatmanesh, H., Albrecht, P., and Ayyub, B. M. (1989a). “Experimental study of prestressed composite beams.” J. Struct. Engrg., ASCE, 115(9), 2349–2364.
13.
Saadatmanesh, H., Albrecht, P., and Ayyub, B. M. (1989b). “Analytical study of prestressed composite beams.” J. Struct. Engrg., ASCE, 115(9), 2365–2382.
14.
Saadatmanesh, H., Albrecht, P., and Ayyub, B. M. (1989c). “Guidelines for Flexural Design of prestressed composite beams.” J. Struct. Engrg., ASCE, 115(11), 2944–2961.
15.
Saadatmanesh, H., and Ehsani, M. R. (1990). “Fiber composite plates can strengthen concrete beams.” Concr. Int., ACI, 12(3), 65–71.
16.
“Structural plastics design manual.” (1984). Manual No. 63, ASCE Manuals and Reports on Engineering Practice, ASCE, New York, N.Y.
17.
Swamy, R. M., Jones, R., and Bloxham, J. W. (1987). “Structural behavior of reinforced concrete beams strengthened by epoxy‐bonded steel plates.” The Struct. Eng., 65A(2), 59–68.
18.
VanGemert, D. A., and VandenBosch, M. C. J. (1985). “Repair and strengthening of reinforced concrete structures by means of epoxy bonded steel plates.” Int. Conf. on Deterioration, Bahrain, 181–192.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 117 • Issue 11 • November 1991
Pages: 3417 - 3433
Copyright
Copyright © 1991 ASCE.
History
Published online: Nov 1, 1991
Published in print: Nov 1991
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