Experimental Investigation of Bonded Fiber Reinforced Polymer-Concrete Joints under Cyclic Loading
Publication: Journal of Composites for Construction
Volume 7, Issue 2
Abstract
The strengthening of reinforced concrete structures by means of externally bonded fiber reinforced polymers (FRPs) is becoming an attractive technique for upgrading existing structures. Although previous laboratory investigations have shown that the bending capacities of beams can be increased considerably with this strengthening technique, premature failure by debonding of the FRP reinforcement can often limit its effectiveness. To gain insight into debonding phenomena, various experimental and analytical investigations of the behavior of bonded FRP-to-concrete joints have been carried out. However, such studies have generally been limited to monotonic (“static”) loading conditions. In this paper, we present results from an experimental investigation of bonded FRP-to-concrete joints under cyclic loading. First, we describe the experimental setup and test parameters. Next experimental results for the effects of cyclic loading on slip at the FRP–concrete interface, crack opening, and strain profiles along the bonded FRP joint are presented and discussed. A power-law expression for the so-called curves (cyclic stress ranges versus numbers of cycles to failure) is proposed, and the parameters in this expression are determined from the experimental data. The influence of various parameters such as bond length, bond width, and cyclic bond stress levels on fatigue behavior are discussed.
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References
Barnes, R. A., and Mays, G. C.(1999). “Fatigue performance of concrete beams strengthened with CFRP plates.” J. Compos. Constr., 3(2), 63–72.
Bizindavyi, L. (2000). “Étude expérimentale et analytique du comportement de l’interface entre les structures en béton armé et les plaques de renfort externes en polymères renforcés de fibers.” PhD thesis, Univ. of Sherbrooke, Sherbrooke, Que., Canada, 440.
Bizindavyi, L., and Neale, K. W., (1999). “Transfer lengths and bond strengths for composites bonded to concrete.” J. Compos. Constr., 3(4), 153–160.
Ferrier, E., Nasseri, H., and Hamelin P. (1999). “Fatigue behavior of composite reinforcement for concrete structures.” Proc., 4th Int. Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, ACI SP-188, C. W. Dolan, S. H. Rizkalla, and A. Nanni, eds., American Concrete Institute, Detroit, 535–546.
Heffernan, P. J. (1997). “Fatigue behaviour of reinforced concrete beams strengthened with CFRP laminates.” PhD thesis, Royal Military College of Canada, Kingston, Ont., Canada, 157.
Meier, U., Deuring, M., Meier H., and Shwegler, G. (1992). “Strengthening of structures with CFRP laminates: Research and application in Switzerland.” Advanced composite materials in bridges and structures, K. W. Neale and P. Labossière, eds. Canadian Society for Civil Engineering, Montreal, 243–251.
Ranisch, E. H., and Rostasy, F. S. (1986). “Bonded steel plates for the reduction of fatigue stresses in coupled tendons in multispan bridges.” Adhesion between polymers and concrete, bonding, protection, and repair, H. R. Sasse, ed., RILEM ISAP, Chapman and Hall, London, 86, 561–570.
Shahawy, M., and Beitelman T. E. (1998). “Fatigue performance of RC beams strengthened with CFRP laminates.” Durability of fibre reinforced polymers (FRP) composites for construction, B. Benmokrane and H. Rahman, eds., Université de Sherbrooke, Sherbrooke, Que., Canada, 169–178.
Tilly, G. P., (1979). “Fatigue of steel reinforcing bars in concrete: A review.” Fatigue Fract. Eng. Mater. Struct., 2(3), 251–278.
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Copyright © 2003 American Society of Civil Engineers.
History
Received: Oct 23, 2001
Accepted: Mar 5, 2002
Published online: Apr 15, 2003
Published in print: May 2003
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