Bonding Mechanism And Analytical Methods Of FRP-concrete Crank Member Interface

In recent years, no matter in domestic and overseas, with the development of trafficvolume, the increase of vehicle load, damage of structure and material aging and manydifferent reasons, a large part of the existing bridges emerge serious shortage of bearingcapacity, even some collapse, given this, reinforcement research of the existing bridges is ofno delay.With a development of reinforcement theory and technology, under the condition ofconsidering comprehensive factors. Recent years, fiber reinforcing reinforced concretebridges has gradually matured, not only in theoretical calculation, but also in the actualreinforcement technique, but the theoretical research of the crankshaft form bridge like archbridge is relatively few, which is only in terms of experience, and the research of Interfacialbonding mechanism and failure mode of fiber reinforcing crankshaft component remains tobe further.The research emphasis of the paper is the interfacial bonding mechanism of fiberlaminate reinforcing concrete crankshaft component. First based on experimental researchof a group of FRP reinforced crankshaft components, the paper regressed Interfacialbonding stress and strain, interfacial bonding parameters such as bond-slip relationship; byusing interfacial bonding parameters and adopting finite element program ABAQUS, thepaper analyzed fiber reinforcing reinforced concrete arch bridge with cohesive zone model,contrastively analyzed with the test results of relative literatures, the analytical results werebasic unanimously, thus verified the accuracy of the finite element model; Second the papertook a micro-unit at the main arch ring of arch bridge, used relative theories of elasticmechanics and material mechanics and structural mechanics, the paper concluded theinterfacial bonding shear stress and stripping normal stress computational formula of fiberreinforcing reinforced concrete arch bridge, and verified the rationality of the formula bythe special case of the test.The research results of the paper provide a feasible calculation method of interfacial bonding stress for FRP reinforcing crankshaft form concrete bridge, the paper established areasonable finite element analytical model, and provided theoretical basis and reference forlater fiber reinforcing crankshaft form bridge.