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A numerical method for estimating the curvature, deflection and moment capacity of FRP reinforced concrete beams is developed. Force equilibrium and strain compatibility equations for a beam section divided into a number of segments are numerically solved due to the nonlinear behaviour of concrete. The deflection is then obtained from the flexural rigidity at midspan section using the deflection formaule for various load cases. A proposed modification to the mid-span flexural rigidity is also introduced to account for the experimentally observed