|Title:||Predicting Fatigue Service Life Extension of RC Bridges with Externally Bonded CFRP Repairs|
|Authors:||Tyler Sobieck, Rebecca Atadero, and Hussam Mahmoud|
|Publication Date:||Dec 2015|
|Keywords:||reinforced concrete bridges, fatigue tests, fiber composites|
|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.
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.