Rehabilitation of Deteriorated Timber Piles using FRP Composites

Louisiana has a large inventory of timber bridges in service. The timber piles in these bridges are succumbing to the effects of biological degradation that initiates in the wet-dry zones of piles. The extent of wet-dry zones in timber piles is significantly influenced by weather extremes such as droughts, extreme summer temperatures and flash floods. Replacing these deteriorated piles is a costly process. In-situ repair of the piles with fiber reinforced polymers (FRP) is an economic alternative that offers a climate adaptive solution. The project will evaluate the capacity of FRP strengthened deteriorated timber piles under axial loads, and a combination of axial loads plus bending with different lengths of deterioration zone with the purpose of investigating the feasibility of restoring and enhancing the capacity of the original timber piles. The results from the experimental program will help determine the ability of the repaired piles to act compositely by investigating the data collected from load cells, displacement sensors, strain gages and Linear Variable Differential Transformers (LVDTs). Additionally, several filler materials were identified for rehabilitating deteriorated timber piles with moderate and severe decays. These filler materials will be subject to a battery of tests to characterize their behavior in compression, tension and their moduli of elasticity. Also, an approach for developing a simplified design method for the use of FRP reinforcement in repairing deteriorated timber piles is presented. The approach is based on the principles of structural mechanics and can be used to evaluate the capacity of the rehabilitated piles under axial loads, and axial loads plus bending.


    • English


    • Status: Completed
    • Funding: $77000
    • Contract Numbers:

      SPTC 15.1-43/DTRT13-G-UTC36

    • Sponsor Organizations:

      Office of the Assistant Secretary for Research and Technology

      University Transportation Centers Program
      Department of Transportation
      Washington, DC  United States  20590
    • Managing Organizations:

      Southern Plains Transportation Center

      University of Oklahoma
      201 Stephenson Pkwy, Suite 4200
      Norman, OK  United States  73019
    • Performing Organizations:

      Louisiana Tech University, Ruston

      Ruston, LA  United States  71272
    • Principal Investigators:

      Hall, David

    • Start Date: 20160301
    • Expected Completion Date: 20180531
    • Actual Completion Date: 0
    • USDOT Program: University Transportation Centers Program

    Subject/Index Terms

    Filing Info

    • Accession Number: 01607731
    • Record Type: Research project
    • Source Agency: University of Oklahoma, Norman
    • Contract Numbers: SPTC 15.1-43/DTRT13-G-UTC36
    • Files: UTC, RiP
    • Created Date: Aug 17 2016 6:24PM