Abstract
The commercially available Glass Fiber-Reinforce Polymer (GFRP) structural sections and reinforcing bars have high durability, low self-weight, and low maintenance costs. As a result, they are expanding their opportunities by replacing structural steel sections and reinforcing bars in corrosive environments. The current study presents a mechanics-based analytical derivation for the load-moment (P-M) interaction diagram of rectangular concrete columns in uniaxial bending reinforced with steel reinforcement and GFRP bars. The approach incorporates strain compatibility, force equilibrium, and the constitutive relations of the materials into the derivation. In addition, a parametric study analyzed the effects of the percentage of longitudinal reinforcement, concrete strength, and cover thickness. The P-M curve for GFRP reinforced column deviate from the conventional form with increased value of axial load and moment at balance section. Additionally, the balance moment value surpasses the value given by the steel reinforced column for higher reinforcement. Increasing the concrete compressive strength and decreasing the cover thickness has same effect on steel reinforced and GFRP reinforced column.[Copyright information to be updated in the production process]
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