Evaluate Effect of Various Parameters on the Shear Strength of FRP-Reinforced Concrete Beams with or Without Stirrups

Most of the available design codes and models are overly conservative or not comprehensive. The purpose of this study is to investigate the effect of various parameters, including (1) the ratio between shear span and depth, (2) concrete compressive strength, (3) FRP axial rigidity, (4) the ratio between the transversal and longitudinal FRP reinforcements axial rigidity, and (5) cross-section aspect ratio on the prediction of the shear strength of beamswith andwithout FRP stirrups using an existing genetic programming model. Form 80 investigations, a total of about 552 beams tested under shear were gathered. In addition, a few available models in the literature were selected and used to calculate the shear strength of the tested beams. The proposed model represented the arch action mechanism, effect of concrete strength, transversal and longitudinal FRP reinforcement, stirrup effect on concrete contribution, and aspect ratio in a much better way than other methods concerning experimental results.