Abstract
AbstractThis paper presents the results from an investigation into the reliability of reinforced concrete bridge girders strengthened in shear using fiber-reinforced polymers (FRP). Two expressions for the shear design of FRP-strengthened girders were developed as part of a National Cooperative Highway Research Program project. The expressions were developed for two distinct cases, namely, bonded and anchored FRP reinforcement. Uncertainties inherent in the new design models were first assessed using an extensive database of hundreds of experimentally tested specimens. Variabilities in material, fabrication tolerances, dead and live loads, and distribution factors obtained from the literature were then included in a limit state function for the shear strength mode of failure. The reliability of a representative design space comprising 18 bridge girders that cover different span lengths, shear deficiency levels, and girder location (exterior versus interior) was calculated for both bonded and anchored stre...
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