The Effect of Type, Thickness and Grid Mode of FRP Fiber on the Rehabilitation of Concrete Slabs with Opening

This study examines the type, thickness, and the way of gridding and placement of FRP sheets with concrete slabs. Shear and bending failures are two major failures in concrete members. One of the ways to reinforce structural members is to use polymer plates that are used due to their low thickness, good effect and balanced price. In this study, eight samples of reinforced concrete reinforced slab reinforced single, double and different location of modeling and results were investigated, of which 2 samples were single FRP, 3 samples were double FRP and 3 were grid mode of Reinforced concrete slab. Reinforced concrete slabs with dimensions of 3400 mm in length, 2500 mm in width and 160 mm in thickness. Longitudinal and transverse rebars with a score of 12 and at a distance of 20 mm from the surface of the slab. After reviewing, it was found that in general, slabs reinforced with CFRP fibers performed better in terms of loading and breaking, and by doubling these plates, a better effect is observed. In the discussion of FRP placement, whatever the regular grid mode and the placement of the force, has a great impact.