Recently, glass fiber-reinforced polymer (GFRP) bars have been considered are emerging as a potential alternative to steel rebars due to their durability and resistance to corrosion. However, investigations on shear behavior of rubberized RC beams modified with GFRP bars have not been well established. On the other side, it is possible to reduce the dangerous materials found in tires and generate sustainable crumb rubberized concrete. In this study, the static performance of rubberized concrete deep beams reinforced with GFRP bars was evaluated. Rubber crumbs are substituted with fine sand aggregate in volumetric replacement ratios to create rubberized concrete. The primary factors were the amount of crumb rubber (0%, 10%, and 20%) and the main ratio of reinforcement (𝜌1 = 0.0085 𝑎𝑛𝑑 𝜌2 = 0.0113). Six RC deep beams having dimensions of (1400×300150×) (Length×Depth×Width) subjected to a 4-point loading up to failure. The mixture strength properties, load-midspan deflection curves, first crack, the effect of GFRP reinforcement ratio, and ductility index were the parameters examined. The results showed that increasing the volumetric percentage of rubber aggregate declined the compressive and splitting strengths of concrete mix. It was revealed that the behavior of the rubberized concrete deep beams influenced the load-deflection performance, the ultimate load, the increase in the deflection and ductility index. The test results reveal the significance of the GFRP bars, which are found to effectively improve the ultimate load and deflection of RC beams and increase the load before initiating cracking. The deep beams with 10% rubber and a higher reinforcement ratio showed the highest ultimate load and deflection and improved ductility, with an increase of 61%, 147.6%, and 25%, respectively, in comparison to the reference samples.
