Postrepair Fatigue Performance of FRP-Repaired Corroded RC Beams: Experimental and Analytical Investigation
Publication: Journal of Composites for Construction
Volume 9, Issue 5
Abstract
This paper presents the results of an experimental and analytical study of the fatigue performance of corroded reinforced concrete (RC) beams repaired with fiber-reinforced polymer (FRP) sheets. Ten RC beam specimens were constructed. One specimen was neither strengthened nor corroded to serve as a reference; three specimens were corroded and not repaired; another three specimens were corroded and repaired with U-shaped glass FRP sheets that wrapped the cross section of the specimen; and the remaining three specimens were corroded and repaired with U-shaped glass FRP sheets for wrapping and carbon-fiber-reinforced polymer (CFRP) sheets for flexural strengthening. The FRP sheets were applied after the main reinforcing bars were corroded to an average mass loss of 5.5%. Following FRP repair, some specimens were tested immediately to failure, while the other repaired specimens were subjected to further corrosion before being tested to failure to investigate their postrepair (long-term) performance. Reinforcement steel pitting due to corrosion reduced the fatigue life significantly. The FRP wrapping had no significant effect on the fatigue performance, while using CFRP sheets for flexural strengthening enhanced the fatigue performance significantly. The fatigue results were compared to smooth specimen fatigue data to estimate an equivalent fatigue notch factor for the main reinforcing bars of the tested specimens.
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Acknowledgments
The writers would like to express their gratitude to ISIS Canada Research Network (Intelligent Sensing for Innovative Structures) for their financial support. Material donation by Sika Canada and the help of the technical staff at the University of Waterloo are greatly appreciated.
References
Alonso, C., Andrade, C., Castello, M., and Castro, P. (2000). “Chloride threshold values to depassivate reinforcing bars embedded in a standardized OPC mortar.” Cem. Concr. Res., 30, 1047–1055.
ASTM. (2002). “Standard practice for preparing, cleaning, and evaluating corrosion test specimens.” G1-90, West Conshohocken, Pa.
Bannantine, J., Comer, J., and Handrock, J. (1990). Fundamentals of metal fatigue analysis, Prentice Hall, Englewood Cliffs, N.J.
Barnes, R. A., and Mays, G. C. (1999). “Fatigue performance of concrete beams strengthened with CFRP plates.” J. Compos. Constr., 3(2), 63–72.
Heffernan, P. (1997). “Fatigue behaviour of reinforced concrete beams reinforced with CFRP laminates.” PhD thesis, Royal Military College of Canada, Ontario, Canada.
Heffernan, P. J., and Erki, M. A. (2004). “Fatigue behavior of reinforced concrete beams strengthened with carbon fiber reinforced plastic laminates.” J. Compos. Constr., 8(2), 132–140.
Masoud, S. (2002). “Behaviour of corroded reinforced concrete beams repaired with FRP sheets under monotonic and fatigue loads.” PhD thesis, Univ. of Waterloo, Waterloo, Ontario, Canada.
Masoud, S., Soudki, K., and Topper, T. (2001). “CFRP-strengthened and corroded RC beams under monotonic and fatigue loads.” J. Compos. Constr., 5(4), 228–236.
Mays, G., and Tilly, G. (1982). “Long endurance fatigue performance of bonded structural joints.” Int. J. Adhes. Adhes., 2(2), 109–114.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 9 • Issue 5 • October 2005
Pages: 441 - 449
Copyright
© 2005 ASCE.
History
Received: Jul 9, 2004
Accepted: Oct 4, 2004
Published online: Oct 1, 2005
Published in print: Oct 2005
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