Abstract
AbstractThe flexural behavior of fatigued reinforced concrete (RC) beams strengthened using prestressed near surface mounted (NSM) carbon fiber–reinforced polymer (CFRP) strips was investigated. Five RC beams were tested; one beam served as a control unstrengthened beam, while the other beams were prestressed to strain values corresponding to 0, 21, 40, and 60% of the CFRP ultimate tensile strain. The beams were subjected to fatigue load conditions for 3 million cycles. Thereafter, the postfatigue monotonic flexural behavior of the beams was compared with identical unfatigued beams. Test results showed that the fatigue loading had a minor effect on the bond performance at the concrete-epoxy interface of the RC beams. In general, fatigue loading did not affect significantly the postfatigue monotonic performance of the tested beams in terms of yield and ultimate loads and deflections, as compared with identical unfatigued beams tested in static conditions. The ductility of the tested beams was also evaluate...
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