Predicting Fatigue Service Life Extension of RC Bridges with Externally Bonded CFRP Repairs

This paper presents the results of an experimental study on the fatigue performance of reinforced concrete (RC) beams strengthened with different externally bonded carbon fiber reinforced polymer (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.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=827
• 
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Colorado State University, Fort Collins

  Department of Civil and Environmental Engineering
  Fort Collins, CO  United States  80525

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Sobieck, Tyler
  • Atadero, Rebecca
  • Mahmoud, Hussam
• Publication Date: 2015-12

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 68p

Subject/Index Terms

• TRT Terms: Carbon fibers; Fatigue cracking; Fiber reinforced polymers; Recommendations; Reinforced concrete bridges; Reinforcing bars; Repairing; Service life
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01587638
• Record Type: Publication
• Report/Paper Numbers: MPC 15-292
• Files: UTC, TRIS, RITA, ATRI, USDOT
• Created Date: Jan 27 2016 5:11PM