Experimental Investigation of the Flexural Performance of Hybrid (GFRP and STEEL) Reinforced Concrete Beams

Abstract

The corrosion of steel reinforcement is a key contributor to the inability of concrete buildings to withstand long-term exposure to the elements. Fiber-reinforced polymer (FRP) has become an alternative to steel reinforcement in concrete structures to solve this problem. One drawback is GFRP's low modulus of elasticity is one drawback. The main objective of this study is to develop a practical hybrid FRP bar for concrete structures, especially for marine and harbor concrete structures, using the concept of material hybridization. The purpose of hybridization is to increase the elastic modulus of GFRP bars with acceptable tensile strength and improve their flexural ductility, as well as enhance the corrosion protection performance of both GFRP. GFRP crust with steel core bar is being considered in the development of hybrid FRP bars. The elastic modulus of the hybrid GFRP bar can be increased by up to 280 percent, according to the findings of this study. The bars are manufactured locally, utilizing a double-part die mold and locally sourced raw materials. Four-line static loading is used to examine the flexural limit states of nine beams with parameters of 200 mm width x 350 mm thickness x 2000 mm length, including pre-cracking behavior, cracking pattern, deflection, load capacity and strain, and failure mechanism.