FRP Rebar Concrete Beam Deflection Calculation Method

Due to the linear relationship of stress-strain of FRP rebar, its concrete structural stressed deformative properties are different from those of the reinforced concrete structure. The study tests the properties of FRP rebar concrete beam deflection, drawing the deflection-to-load relation curve under the monotonic loading effects, and analyzes the beam's deformative properties and failure patterns. Combined with the testing results, the study contrasts the domestic and foreign measurement methods of the FRP rebar concrete beam's deflection. In addition, based on the bilinear moment-curvature relation model defined by cracking-segment bending moment and that of limiting conditions, the study derives the measurement formula of FRP rebar concrete beam's deflection, and the results approximate those of previous tests.