Theoretical Research On Behavior Of Concrete Beam Reinforced With FRP Bars

The modern prestressed concrete structures are widely applied in civil engineering, but due to the corrosion resistance of prestressing steel is not strong and making some structural durability problems. To solve this problem, Reinforcement Material Research and Development of the alternative products as steel fiber reinforced polymer (FRP) has been burgeoning in China in recent years. For Civil Engineering, the fiber-reinforced polymer mainly has carbon fiber (CFRP), fiberglass (GFRP), and aramid fiber (AFRP); because of its high strength, lightweight, corrosion resistance, anti-fatigue, and other advantages, they will be widely used in civil engineering.Based on the research of scholars in the domestic and foreign, and used for reference to scholars' experiments in the domestic and foreign, this essay mainly studied about the FRP force performance, the specific research is as follows:First, in view of different between the characteristics of FRP and its Mechanical Properties with reinforced steel, and also based on analysis of the FRP reinforced with concrete bond between the sliding mechanism, introduced FRP reinforced concrete and the bond-slip model and the formula for calculating the FRP reinforcement Anchorage and the length of lap;Secondly, based on the equivalent load method and FRP reinforced concrete cooperative relations with the analysis of FRP reinforced concrete beam analysis calculation, and then compared calculation results with experimental data, thus, the FRP reinforced concrete cooperative relations with the analysis method is better reflect FRP reinforced concrete components of the force, and its result is similar as the actual force, so it provides a reference about design and calculation of FRP reinforced concrete beam;Moreover, according to the characteristics of FRP reinforced, based on the analysis of its failure mechanism concrete beams, referenced its formula that how to calculate concrete beam cross-section bearing capacity, and based on assumptions' section and static balance, at the result; against of FRP reinforced concrete beams are bending section bearing capacity formula. Using Fortran way, and the experimental data were compared, the results is tallied with the experimental value;Finally, through the FRP concrete beams for Finite Element Analysis, inspected the FRP reinforced concrete beams force performance: different with prestressed concrete. Under load effect, the tensile stress share of Prestressed concrete beams in the FRP reinforcement and non-prestressed reinforced are both depend on the FRP reinforcement elastic modulus of the location and layout of FRP reinforcement and other factors; and suggested the design of FRP.