Design of FRP Systems for Strengthening Concrete Girders in Shear

Fiber reinforced polymer (FRP) systems have been used for more than 15 years and are becoming a widely accepted method of strengthening concrete structures. FRP systems for strengthening reinforced or prestressed concrete girders consist of externally bonded laminates or near-surface mounted bars. These systems may contain either carbon or glass fibers. Extensive research has shown that FRP systems improve both short-term and long-term flexural behavior of concrete girders. American Concrete Institute (ACI) Committee 440 has developed guidelines for design and construction of externally bonded FRP systems for strengthening concrete structures. In contrast to flexural behavior, there are less experimental and analytical data on the use of FRP systems for shear strengthening girders. The results of several experimental investigations have shown that FRP systems can be effective for increasing the shear strength of concrete girders, but there have been limited analytical studies of the shear behavior of concrete girders strengthened in this manner. Design of FRP strengthening systems has been based on system- or project-specific research. An American Association of State Highway and Transportation Officials (AASHTO) design method for FRP shear strengthening of concrete girders is needed. The objective of this project is to develop design methods, specifications, and examples for design of FRP systems for strengthening concrete girders in shear. The proposed specifications should be in load and resistance factor design (LRFD) format and should be suitable for recommendation to the AASHTO Highway Subcommittee on Bridges and Structures for adoption.


  • English


  • Status: Completed
  • Funding: $400000
  • Contract Numbers:

    Project 12-75

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Hanna, Amir

  • Performing Organizations:

    Missouri University of Science and Technology, Rolla

    1870 Miner Circle
    Rolla, MO  United States  65409
  • Principal Investigators:

    Belarbi, Abdeldjelil

  • Start Date: 20060327
  • Expected Completion Date: 0
  • Actual Completion Date: 20100630
  • Source Data: RiP Project 11098

Subject/Index Terms

Filing Info

  • Accession Number: 01463021
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 12-75
  • Files: RIP, USDOT
  • Created Date: Jan 3 2013 2:15PM