Experimental Studies Of Concrete Beams Reinforced With HFRP Bars

Glass fiber reinforcement, carbon fiber, aromatic vinylon fiber reinforcementstress-strain relationship in failure before change is linear elastic.The elastic modulus of theCFRP tendons highest, but the ductility is relatively poor and cost is high.The ductility ofGFRP bars is better, but modulus of elasticity is lower.AFRP band ductility is best, but thefiber and resin matching is poor. In order to solve the problem of a single fiber for high costand low ductility and elastic modulus, we have developed HFRP. HFRP band is two or morethan two kinds of continuous fiber reinforced by matching each other, produce coordination,coordination of hybrid effect and made of a new type of composite rebars. HFRP band notonly has high strength, modulus and toughness, and also can reduce weight, reduce cost, raiseeconomic benefits. On the basis of the FRP and HFRP concrete beam test, I carry out finiteelement analysis. The main content of the study include the following:1. Experimental study on mechanical properties of HFRP barI carry out CFRP and GFRP tendon tensile performance test and come to the mechanicalproperties of FRP bars. The HFRP tendons test stress-strain relations with FRP bars stress-strain relationship is Compared. HFRP reinforced hybrid effect is analyzed.2. Finite element analyze FRP reinforced concrete beam bending testFRP reinforced concrete beam bending test is carried out. Using Ansys to simulate theFRP reinforced concrete structure internal force and deformation of the whole process ofdevelopment and detail simulation of the whole process. The ductility of FRP reinforcedconcrete beams is analyzed. Damage model of the beam and the ductility defined isproposed. The influence of FRP reinforced concrete beams ductility factor and improvementmeasures of beam ductility is pointed out.3. Finite element analyze HFRP reinforced concrete beam bending testI will compare test results with the calculated results and research of HFRP reinforcedconcrete beam deformation and crack load variation. At last I summarize HFRP reinforcedconcrete beam crack spacing and width calculation method.