Predicting fatigue service life extension of RC bridges with externally bonded CFRP repairs.

Details

• Creators:
  Sobieck, Tyler ; Atadero, Rebecca ; Mahmoud, Hussam
• Corporate Creators:
  Colorado State University. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Fatigue cracking
  • Reinforced concrete bridges
  • Reinforcing bars
  • Fiber reinforced polymers
  • Carbon fibers
  • Repairing
  • Service life
  • Recommendations
• Publication/ Report Number:
  MPC 15-292
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Mountain Plains Consortium
• Abstract:
  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.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29743/dot_29743_DS1.pdf
• File Type:
  [PDF - 3.47 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:c1be46b3750c7aafbc15ae87ba2cd84463b99c56e56094c93fe3032245b0e207