Test MethodGeometric and mechanical characterization of ribbed FRP rebars

The paper discusses the advantage of fiber-reinforced polymer (FRP) rebar for application in concrete because of its light weight, high strength, high corrosion resistance and durability. Different options of shaping the wave-like texture of FRP bars for concrete bonding are considered. The diameter measurement problem of ribbed FRP bars is examined, and a proprietary procedure is suggested to determine the equivalent diameter and elastic modulus of ribbed FRP bars. The tensile strength (889-1197 MPa) obtained herein is greater than the longitudinal flexural strength (566-822 MPa), which is due to the ribs, contrary to the case of plain bars. The elastic modulus values obtained (40-61 GPa) are in agreement with the known literature data.