ABSTRACT
Corrosion of steel bars is one of the main factors leading to the decline of the durability of reinforced concrete structures, and Fiber Reinforced Polymer (FRP) bars can effectively improve this situation. At present, a series of studies have been carried out on FRP bars at home and abroad, but there are still few studies on composite FRP bars. In this study, tensile tests of CFRP sheet-wrapped FRP bars under normal conditions are carried out, including the following research contents. The tensile properties of GFRP bars wrapped with a Carbon Fiber Reinforced Polymer (CFRP) sheet in the laboratory environment were studied. And the failure characteristics, tensile strength, elastic modulus and shear strength of the specimens were analyzed. The results show that the number of layers of fiber sheet has different effects on strength with a decreasing trend as the number of layers of wrapped fiber sheets increases. The tensile failure modes of GFRP bars and GFRP bars wrapped with CFRP sheets correspond to split and semi-split failures respectively. The tensile strength of the composite GFRP bar wrapped with a layer of carbon fiber sheet has the largest increase, which is up to 92.59%; As the number of layers of wrapped carbon fiber sheet increases, the modulus of elasticity of the specimen gradually increases.
