Evaluation of repair techniques for impact-damaged prestressed beams : final report.

Details

• Creators:
  Gangi, Michael ; Jones, Mark ; Liesen, Justin ; Zhou, Jiaxing ; Pino, Vanessa ; Cousins, Thomas E. ; Roberts-Wollman, C. L. ; Koutromanos, Ioannis ; Nanni, Antonio
• Corporate Creators:
  Virginia Center for Transportation Innovation and Research
• Corporate Contributors:
  Virginia Transportation Research Council (VTRC) ; United States. Federal Highway Administration. Virginia Division ; Virginia. Dept. of Transportation ; United States. Department of Transportation. University Transportation Centers (UTC) Program
• Subject/TRT Terms:
  • Prestressed concrete bridges
  • Fiber reinforced polymers
  • Repairing Prestressed beam repair
  • fiber-reinforced polymer wraps
  • fabric
  • reinforced cementitious matrix (FRCM)
  • strand splices
• Publication/ Report Number:
  CAIT-UTC-035
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;Virginia
• Edition:
  Final report
• Corporate Publisher:
  Virginia Center for Transportation Innovation and Research
• Abstract:
  Collisions between over height vehicles and bridges occur about 1,000 times per year in the United States. Collision damage to ; bridges can range from minor to catastrophic, potentially requiring repair or replacement of a bridge beam. For prestressed concrete ; beams, the traditional repair methods are strand splices and Fiber-Reinforced Polymer (FRP) wraps. A new material, Fabric ; Reinforced Cementitious Matrix (FRCM), has been developed as an alternative to traditional FRP wrap. ; The first objective of this project was to damage, repair and test four beams retrieved during the demolition of the overpass of ; Arcadia Road over Interstate 81 at Arcadia, VA. The repair techniques evaluated were strand splices, FRP, FRCM and a ; combination of FRCM and strand splices. The beams were tested in the lab in simple span configuration with the repair location ; placed in a region of constant moment. Loads were applied monotonically to failure. One beam was tested in an undamaged ; condition as a control. ; Several methods were used to calculate strength and behavior. Simple methods from AASHTO and ACI were used for hand ; calculations of flexural strength. Conventional strain compatibility was also used. Non-linear beam models and non-linear three ; dimensional finite element models were also investigated as tools to evaluate repaired beams. Material characterization was ; performed on the concrete, prestressing steel, splice chucks, FRP and FRCM. The material characterization was used to develop the ; material models for the analyses. ; It was found that the greatest percentage of original strength was returned by the FRP repair and the repair with the combination of ; FRCM and splice chucks. The lowest percent was returned with only splice chucks when eight of 48 strands were severed and ; spliced. The FRCM proved to be a viable repair technique, but should be tested in fatigue before deployment on a bridge with high ; truck traffic. The analysis methods were shown to provide good estimates of strength and load-deflection behavior.
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• Format:
  PDF
• Funding:
  DTRT12-G-UTC16
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32327/dot_32327_DS1.pdf
• File Type:
  [PDF - 3.71 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:32a07b74ce5c21e8292628135791c97eebb9a49e511f4c88abb8435a6ce175bc8ede92dc7106cbecc770cb86428d87652f29a59894d8d7a2b0eb4a28fa499ceb