- The document discusses fiber-reinforced polymer (FRP) confined concrete under monotonic and cyclic axial loading. It summarizes previous research that has studied the stress-strain behavior of normal-strength concrete (NSC) confined with FRP but notes gaps in understanding high-strength concrete (HSC) confinement. - The study analyzes experimental data on FRP-confined NSC and HSC cylinders under different loading conditions. It finds existing models accurately predict NSC behavior but overestimate plastic strains for HSC. - The document proposes further research is needed to develop a model that can accurately predict the stress-strain behavior of FRP-confined HSC under various loading conditions. Filling this