Deploying FRP Optimally in the Process of Strengthening Concrete Structures

FRPs are lightweight, durable, and resistant materials that are easily available to engineers today. FRP materials are insulated in magnetic environments and do not have corrosion problems, so by using these materials, the corrosion problem of concrete structures can be avoided. Also, these materials have superior characteristics such as high tensile strength, which makes their use as reinforcement of concrete structures suitable. It should be mentioned that, like any material, FRPs have weak points such as sensitivity to fire and weakness in bearing compressive stresses, as well as high price. In examining the effect of the installation angle of the GFRP rod; It was found that the shear reinforcement of reinforced concrete beam by NSM method with the same number and the same installation distance of GFRP rods, the arrangement of the rods with an angle of 45 degrees, has the greatest effect compared to the angles of 60 and 90 degrees It was also found that with the same amount of GFRP and the same installation distance, the arrangement of GFRP bars with an angle of 60 degrees is more effective than 90 degrees. Investigating the effect of the number and distance of GFRP rod installation showed that in the shear strengthening of the reinforced concrete beam by NSM method with the same installation angle of GFRP rod, using a rod with smaller dimensions and less distance has a greater effect on the efficiency of the reinforced beam.