The Research On The Strength Of Normal Section Of CFRP Reinforced Concrete Column

CFRP tendon is characteristics of light weight, high strength, and corrosion resistance. CFRP reinforced concrete structures can make up for reinforced concrete structures from great weight and the major disadvantage of steel corrosive.The mechanical properties of CFRP tendons approximate linear elasticity and failure mode of brittle failure make it largely restricted in the concrete structure.In order to study CFRP compressive properties of reinforced concrete columns,the finite element software is used to study CFRP reinforced concrete columns characteristics in axial compression, eccentric compression and hybrid reinforcement. This paper has finished the following tasks.The FEM software MSC.Marc has been used to simulate the axial compression experiment of CFRP reinforced concrete columns, and the results were in compliance with the experiment. On this basis, the research on the numerical simulate experiment has been conducted. Through the analysis of 60 different reinforcement ratio, CFRP stirrup spacing and concrete strength results of the simulation specimens.the facters affecting the bearing capacity and its transformation rules have been obtained.The theory about the restraining behavior of CFRP hoops to the concrete is analyzed.CFRP tendons confined concrete strength calculation formula is proposed.Simulated Rectangular cross-section of CFRP reinforced concrete columns eccentric compression tests by finite element software MSC.Marc and the results were in compliance with the experiment.On this basis, the research on numerical simulate experiment of asymmetric CFRP reinforced concrete eccentric compression columns.Through the analysis of 23 different reinforcement ratio,CFRP stirrup spacing,concrete strength,slenderness and eccentricity simulation specimens, the results indicate that the carrying capacity of the non-symmetrical reinforcement components decreases with eccentricity,slenderness and stirrup spacing,but increase with reinforcement ratio and concrete strength.Lateral deformation increases with eccentricity.slenderness and stirrup spacing.but decrease with reinforcement ratio and concrete strength.For successfully simulated the behavior of the concrete eccemtric compressive columns reinforced with CFRP tendons,the research on the numerical simulate experiment of concrete eccentric compressive columns reinforced with CFRP tendons and steel reinforcement.The 36 simulation specimens of different reinforcement ratio,CFRP stirrup spacing,concrete strength,slenderness and eccentricity have been conducted.The results indicate that the carrying capacity increase with reinforcement ratio and concrete strength, but decreases with eccentricity, slenderness and stirrup spacing.The bearing capacity of two reinforced concrete forms were closed.According to the results of numerical simulation experiments,analysis of two kinds of hybrid reinforcement component forms failure mode.The calculation formula of bearing capacity has been presented and can be used as a reference of engineering application.