FRP Strengthening of Continuous RC Bridge - Letohatchee, Alabama

The Letohatchee bridge is a continuous, reinforced concrete, deck-girder bridge maintained by the Alabama Department of Transportation (ALDOT) along AL 97 over I-65 near Letohatchee, Alabama. The bridge was deficient in negative-moment flexural capacity and was strengthened using near-surface mounted fiber-reinforced polymer (NSM FRP) strips. The bridge was load tested before and after implementation of the NSM FRP strengthening program. A long-term test was also conducted one year after installation to evaluate behavior of the NSM FRP system after a year of exposure to the environment and service loads. Installation of the strengthening system is documented in this report. The NSM FRP system exhibited an apparent 10% reduction in girder reinforcing steel stress, while stress in slab reinforcement may have increased due to a more even distribution of moment across the bridge cross section. The NSM FRP system did not show any signs of bond degradation or strength loss one year after installation.

  • Corporate Authors:

    Auburn University

    Highway Research Center, Harbert Engineering Center
    Auburn, AL  United States  36849-5337

    Alabama Department of Transportation

    1409 Coliseum Boulevard
    Montgomery, AL  United States  36130-3050

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Childs, William B
    • Barnes, Robert W
    • Schindler, Anton K
  • Publication Date: 2019-10


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 153p

Subject/Index Terms

Filing Info

  • Accession Number: 01729670
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/ALDOT 930-745S-2F
  • Contract Numbers: 930-745S
  • Created Date: Jan 30 2020 11:08AM