Validating the predicted axial strength of FRP-reinforced concrete circular columns

Over the last three decades, researchers have significantly contributed to advancing fiber-reinforced polymer (FRP) bars to address corrosion issues in conventional steel reinforcement bars embedded in components of reinforced concrete structures. This research aimed to establish an ideal allowable axial compression load for concrete columns reinforced with FRP using data from previous studies. This article compares and explains the contrasts of several of the most popular FRP codes (ACI, CSA, and JSCE) with one equation proposed in previous research using empirical information gleaned from the literature review. The models' statistical analysis compares theoretical and practical loads, Young's modulus, concrete strength, longitudinal reinforcement ratio, and transverse reinforcement ratio for hoops and spirals. Estimating the effect of FRP longitudinal bars on the applied load carried by FRP-reinforced concrete columns can be done with the help of an empirical equation that uses the compressive strength of concrete to estimate the axial stress of FRP longitudinal bars in concrete columns. Results from the CSA and the ACI were almost similar, and both were superior to those from the JSCE in terms of being ideal, consistent, and safe. The results for modulus of elasticity, concrete compressive strength, and transverse reinforcement ratio for spiral reinforcement were more stable, according to the CSA. In contrast, according to the ACI, results for longitudinal and transverse reinforcement ratios of hoop reinforcement were more stable and secure. Lastly, the previously proposed equation is the best way to determine the transverse reinforcement ratio for hoop reinforcement and the compressive strength of concrete from all codes. In conclusion, the previously proposed equation is the most effective for calculating the transverse reinforcement ratio for hoop reinforcement and compressive strength.