A Theoretical Study of GFRP RC Beams Deflection

Abstract

The use of GFRP reinforcing bars as an innovative material for substituting steel bars in reinforced concrete is now increasingly popular for structures which are located in corrosive areas. The GFRP bars have low modulus of elasticity (35-51 GPa), such that the stiffness of GFRP reinforced concrete will be lower than those of the corresponding steel reinforced concrete. Lower in stiffness means larger deflection will occur. This paper aims to introduce the use of GFRP bars in reinforced concrete beams particularly in terms of theoretical deflection calculation of GFRP reinforced concrete beams with ratios of 0.5%; 0.8%; 1.1%, and 1.7%; and based on the equations proposed by several researchers and the design guidelines from several countries such as ACI 440.1R-15; CSA S806-12; CNR-DT 203/2006; ECP 208-2005; Fib bulletin 40 (2007).