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    Author(s): Alyssa E. Schorer; Lawrence C. Bank; Michael G. Oliva; James P. WackerDouglas R. Rammer
    Date: 2008
    Source: 2008 Structures Congress [electronic resource] : crossing borders : April 24-26, 2008, Vancouver, BC, Canada : [and the] 18th Analysis and Computation Specialty Conference. [Reston, Va.]: American Society of Civil Engineers, c2008: ISBN: 9780784409770: 0784409773: [10] pages.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (292.22 KB)

    Description

    Many timber trestle railroad bridges in Wisconsin have experienced deterioration and are in need of rehabilitation. In addition, the railroad industry is increasing the weights of cars. The combined effect of heavier loads and deterioration threatens to cut short the service life of timber bridges. One of the most critical problems that has been identified was the overloading of timber piles in bridges, which can be remedied by creating a stiffer pile cap. The goal of this investigation was to show that fiber reinforced polymer (FRP) strips fastened to timber with screws can be used to create composite action between two beams in flexure or truss action between two deep beams. Ultimately this may help redistribute the loads to piles when FRP strips are used as struts on cap beams over short spans. Several test series were conducted with beams in flexure, deep beams over short spans, and full scale specimens to determine the manner in which FRP strips improved the members’ performance. Mechanically fastened FRP strips were effective in developing composite action in slender beams in flexure and truss action in short deep beams.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Schorer, Alyssa E.; Bank, Lawrence C.; Oliva, Michael G.; Wacker, James P.; Rammer, Douglas R. 2008. Feasibility of rehabilitating timber bridges using mechanically fastened FRP strips. 2008 Structures Congress [electronic resource] : crossing borders : April 24-26, 2008, Vancouver, BC, Canada : [and the] 18th Analysis and Computation Specialty Conference. [Reston, Va.]: American Society of Civil Engineers, c2008: ISBN: 9780784409770: 0784409773: [10] pages.

    Keywords

    Railroad bridges, elasticity, maintenance, repair, bridges, inspection, wooden bridges, deterioration, timber connectors, joints, service life, design, construction, Wisconsin, wood-plastic composites, composite materials, loads, wood plastic materials, performance testing, flexibility, stiffness, bending strength, timber bridges, connectors

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https://www.fs.usda.gov/treesearch/pubs/34323