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One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Feasibility of Rehabilitating Timber Bridges Using Mechanically Fastened FRP Strips

Source: In Proceedings of the 2008 structures congress: Cross borders. American Society of Civil Engineers. 2008 April 24026. Vancouver, BC, Canada. 10 p. Proceedings on CD. 2008

Author(s)Schorer, Alyssa E.; Bank, Lawrence C.; Oliva, Michael G.; Wacker, James P.; Rammer, Douglas R.

Publication Year: 2008  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4714-3A

Abstract: 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.

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

File size: 293 kb(s)

Date posted: 11/20/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 26472
Current FPL Scientists associated with this product (listed alphabetically)
Rammer, Douglas R.
Research General Engineer
Wacker, James P.
Research General Engineer

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