Abstract
This paper describes application of Fiber Reinforced Polymer (FRP) composite laminates to strengthen a seventy-year old reinforced concrete T-beam bridge in Rensselaer County, New York. Leakage at the joints of this single-span bridge lead to substantial moisture and salt infiltration in the superstructure -- manifested in efflorescence , freeze-thaw cracking, and delamination at some locations. Integrity of the steel reinforcing and overall safety of the bridge was suspected. This concern was heightened by the absence of any documents pertaining to the bridge design, such as bar size, steel type, concrete strength, and design loads. The bridge was strengthened using bonded FRP laminates. Load tests were conducted before and after the FRP laminates were installed to assess effectiveness of the strengthening system. Test results are also compared with those obtained analytically using classical approaches.
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