Abstract
Steel-fiber composite bars (SFCBs), which consists of a steel core and a fiber-reinforced polymer (FRP) pultruded protective coating, are a type of composite reinforcing bars. Although FRP bars have an excellent corrosion resistance, reinforced concrete (RC) beams reinforced with FRP bars may exhibit inferior ductility to beams reinforced with SFCBs. Against this background, an experimental program on flexural behavior of concrete beams reinforced with SFCBs and GFRP bars (referred to as GFRP-SFCB-RC beams) was carried out. The test results including the failure mode, the load-deflection behavior, the moment capacity, the ductility and the energy absorption capacity of the beams are presented and discussed. The test results show that GFRP-SFCB-RC beams have an excellent ductility and a favorite behavior with a post-yield hardening load-deflection curve. The ultimate load, moments, ductility and energy absorption capacity of GFRP-SFCB-RC beams generally increase with an increase in thickness of FRP protective layer.
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