Calculation of Elastic Stiffness of Shear Connector in Steel Concrete Bridge Tower Joint Section

doi:10.12141/j.issn.1000-565X.220253

Abstract

Abstract:

For the research on the mechanical properties of single perforated plate connector or shear stud connector, international scholars have carried out a lot of numerical analysis and experimental exploration, and obtained the mechanical behavior of single perforated plate connector or shear stud connector. However, the interior of the steel-concrete composite section of the actual hybrid bridge tower is composed of a large number of perforated plate connectors and shear stud connectors. At present, the research on composite connectors in steel-concrete structures is relatively scarce, and there is no clear numerical model and theoretical derivation to study the force transfer law of composite connectors. And the influence of the design parameters of the composite connector itself on the compressive performance also needs to be further clarified. Therefore, taking a composite shear connector in the steel-concrete composite section of the bridge tower of Shunde bridge as an example, this paper studied the contributions of the perforated plate connector and the shear stud connector to the compressive stiffness of the single-layer composite shear connector during the elastic loading stage. Then it established the spring model and derived the formula for calculating the elastic stiffness of the single-layer composite shear connector. Using ABAQUS finite element software, the load simulation analysis of single-layer composite shear connectors was carried out. In the elastic loading stage, the load displacement curve shows a strong linear relationship. After fitting, the results are compared with the elastic stiffness calculation results of the derived formula. The results show that the error between the analytical solution and the numerical solution of the compressive stiffness of the single hole perforated plate connector is 4.87%, the error between the analytical solution and the numerical solution of the compressive stiffness of the single shear stud connector is 0.903%, and the error between the analytical solution and the numerical solution of the compressive stiffness of the single-layer composite shear connector is 11.54%. The calculated results of the derived elastic stiffness formula are in good agreement with the results of the finite element simulation analysis.

Key words: single layer combined connector, open-hole plate connector, shear pin, equivalent spring, compressive stiffness

CLC Number:

U443.38

DU Yunwei, WANG Ronghui, ZHEN Xiaoxia, et al. Calculation of Elastic Stiffness of Shear Connector in Steel Concrete Bridge Tower Joint Section[J]. Journal of South China University of Technology(Natural Science Edition), 2023, 51(2): 76-87.

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