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Title:Predicting Fatigue Service Life Extension of RC Bridges with Externally Bonded CFRP Repairs
Authors:Tyler Sobieck, Rebecca Atadero, and Hussam Mahmoud
University:Colorado State University
Publication Date:Dec 2015
Report #:MPC-15-292
Project #:MPC-410
TRID #:01587638
Keywords:fatigue tests, fiber composites, reinforced concrete bridges
Type:Research Report – MPC Publications



This paper presents the results of an experimental study on the fatigue performance of RC beams strengthened with different externally bonded CFRP systems. Seven specimens were fabricated; three had no CFRP; the remaining four had one of two CFRP systems. The objective of this study was to determine the effect the CFRP repair had on the growth rate of a fatigue crack initiating from a notch in the tensile rebars. The results of the experimental study showed an extended fatigue life and a slowed crack growth rate in specimens repaired with both CFRP systems. The crack growth rates were used to determine material constants for the Paris Law, which describes growth of a stable fatigue crack. These results were then used to propose recommendations for design of FRP repair systems for a specific fatigue life.

How to Cite

Sobieck, Tyler, Rebecca Atadero, and Hussam Mahmoud. Predicting Fatigue Service Life Extension of RC Bridges with Externally Bonded CFRP Repairs, MPC-15-292. North Dakota State University - Upper Great Plains Transportation Institute, Fargo: Mountain-Plains Consortium, 2015.

NDSU Dept 2880P.O. Box 6050Fargo, ND 58108-6050