United States Department of Transportation
i
Preservation of Missouri Transportation Infrastructure – Validation of FRP Composite Technology Through Field Testing: Research Brief
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2005-03-01
[PDF-7.94 MB]
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TRIS Online Accession Number:01605782
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Abstract:Under the work of a research team at the University of Missouri-Rolla (UMR), this project is intended to validate the use of fiber-reinforced polymer (FRP) materials as a means to strengthen existing concrete bridges that are considered structurally deficient (Figure 1). For over a decade, FRP laminates have been used worldwide to strengthen, repair or add ductility to existing bridges and buildings. Composite materials are strong, lightweight and not susceptible to corrosion. However, despite all their well-documented benefits, including competitive cost, no traffic-disruption and short-time installation, and anticipated long-term durability, validation of this technology for bridge retrofit applications on a large scale is required. Five existing concrete bridges, geographically spread over three MoDOT districts, were strengthened using five different composite technologies that go under the names of manual lay-up FRP laminates (Figure 2); adhered pre-cured FRP laminates (Figure 3); near surface mounted (NSM) FRP bars (Figure 2); mechanically fastened FRP laminates (Figure 4); and, steel reinforced polymer (SRP) (Figure 5). The aim of the present project is to make these strengthening technologies available to bridge owners and professionals through the development of proposed FRP bridge strengthening design, materials, and construction specifications for potential AASHTO adoption. Validation of composites, taking into account durability issues and cost impact, is undertaken with a fiveyear monitoring program with an emphasis on non-destructive testing (NDT) evaluation.
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