The Numerical Simulation Analysis Method of Steel-concrete Joint Section in Hybrid Girder of Cable-stayed Bridge

The steel-concrete joint section is a critical structure of load transmission in cable-stayed bridge girder. Under the requirement of calculation efficiency, correct numerical simulation is an important method to acquire the inter stress and deflection on the joint section of cable-stayed bridge girder. Taken the steel-concrete joint section finite element analysis of a cable-stayed bridge as an engineering background, the whole process simulation method of cable-stayed bridge steel-concrete joint section is introduced, which considering the nonlinear bond slippage effect and ANSYS program is employed. The effect on mechanical behavior and damage pattern of structures is also compared among different stud constitutive relation. The calculation results show that the numerical results of nonlinear stud joint section FE model are in a good agreement with the model experiment testing data. The equivalent stress of bearing plate from the simulation is relatively high under the ultimate load, and, the crack distribute at the whole concrete section. The calculation results of linear stud FE joint section model are close to the results of nonlinear stud joint section FE model under the design load. Under the ultimate load, the choice of different stud shear stiff model has effect on the concrete at crack initial moment. While after the most concrete crack, there is little difference on the crack distribution between the nonlinear and linear stud joint section FE model.