Effect of Helical Wrapping on Fatigue Resistance of GFRP
Publication: Journal of Composites for Construction
Volume 2, Issue 3
Abstract
Winding helical fiber around fiber reinforced plastic (FRP) rods, which serve as concrete reinforcement, is used to enhance the bond between the rod and the concrete. A theoretical analysis of the strain development in the helical fiber when the rod is subjected to tension shows that the fiber may shorten or lengthen, depending on the winding step size of the helical fiber and the Poisson coefficient of the rod. When the rod is subjected to cyclic loading, extensive damage is caused to the longitudinal fibers by lateral load imposed by the helical fiber, which may lead to a premature failure of the rod. An experimental study on the fatigue behavior of helically-wrapped glass fiber reinforced plastics (GFRP) rods showed that the longitudinal fibers in the region underneath the helical fiber fractured locally by local shear or bending, while the other fibers in the core broke under direct tension. A microscopic study of the fibers along the rod after cyclic loading showed extensive damage to the fibers located under the helical fiber.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Arduini, M., Di Tommaso, A., Manfroni, O., and Nanni, A. (1996). “Failure mechanisms of concrete beams reinforced with FRP flexible sheets.”Proc. Int. Conf. on Advanced Composite Materials in Bridges and Structures, M. M. El-Bardy, ed., Canadian Soc. for Civ. Engrg., Montreal, Canada, 253–260.
2.
Bank, L. C., Puterman, M., and Katz, A.(1996). “The effect of material degradation on bond properties of FRP reinforcing bars in concrete.”ACI Mat. J., 95(3), 232–243.
3.
Bank, L. C., Frostig, Y., and Shapira, A.(1997). “Three dimensional FRP grating cages for concrete beams: A pilot study.”ACI Struct. J., 94(6), 643–652.
4.
Cosenza, E., Manfredi, G., and Realfonzo, R.(1997). “Behavior and modeling of bond of FRP rebars to concrete.”J. Compos. for Constr., 1(2), 40–51.
5.
Den Uijl, J. A. (1995). “Bond and fatigue properties of Arapree.”RILEM Int. Conf. on Non-Metallic (FRP) Reinforcement for Concrete Structure, L. Taerwe, ed., E & FN Spon, London, 146–153.
6.
Katz, A., Berman, N., and Bank, L. C. (1998). “Effect of cyclic loading and elevated temperature on the bond properties of FRP rebars.”Proc. Int. Conf. on Durability of Fiber-Reinforced-Polymer (FRP) Composites for Construction, Sherbrooke, Canada.
7.
Mukae, K., Kumagai, S., Nakai, H., and Asai, H. (1993). “Characteristics of Aramid FRP rods.”Int. Symp. on Fiber-Reinforced-Plastics Reinforcement for Concrete Structures, A. Nanni and C. W. Dolan, eds., American Concrete Institute (ACI), Detroit, Mich., 35–49.
8.
Rahman, A., Taylor, D. A., and Kingsley, C. Y. (1993). “Evaluation of FRP as reinforcement for concrete bridges.”Int. Symp. on Fiber-Reinforced-Plastics Reinforcement for Concrete Structures, A. Nanni and C. W. Dolan, eds., American Concrete Institute (ACI), Detroit, Mich., 71–80.
9.
Rahman, A. H., Adimi, M. R., and Benmokrane, B. (1996). “Fatigue behaviour of FRP reinforcements encased in concrete.”Proc. Int. Conf. on Advanced Composite Materials in Bridges and Structures, M. M. El-Bardy, ed., Montreal, Canada, Canadian Soc. for Civ. Engrg., 691–698.
10.
Saible, F., Priestley, M. J. N., and Hegemier, G. A.(1997). “Seismic retrofit of RC columns with continuous carbon fiber jackets.”J. Compos. for Constr., 1(2), 52–62.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 2 • Issue 3 • August 1998
Pages: 121 - 125
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Aug 1, 1998
Published in print: Aug 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.