Time-Dependent Effects from Monitoring of State Street Bridge FRP Composite Retrofit

This project report summarizes the results of monitoring the State Street Bridge on Interstate 80, which is a reinforced concrete bridge retrofitted with Fiber Reinforced Polymer (FRP) composites. Strengthening reinforced concrete bridges by using FRP composites is proving to be a more effective method compared to traditional retrofit methods. FRP composites have a number of advantages over reinforced concrete and structural steel, including their high strength-to-weight ratio and excellent durability, and have been used widely to replace steel in the retrofit of concrete columns. Destructive and nondestructive techniques were employed to evaluate the long-term durability of the Carbon FRP (CFRP) composite and externally CFRP-reinforced concrete of the State Street Bridge on Interstate 80, including the bond-to-concrete capacity of the CFRP composite for three years of exposure. Thermographic imaging was used for detection of voids between CFRP composite and concrete. Although environmental conditions were found to have an effect on the long term durability of the CFRP composite and CFRP-reinforced concrete substrate, no evidence of further steel reinforcement corrosion was observed, and the CFRP composite retrofit is still effective. The research has shown that the seismic performance capability of the bridge did not degrade significantly when compared to the original conditions in 2000 when the retrofit was done. Recommendations for implementation and future research are made.

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 33p

Subject/Index Terms

Filing Info

  • Accession Number: 01044133
  • Record Type: Publication
  • Report/Paper Numbers: UT-07-01, CVEEN-06/1
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 14 2007 8:10AM