Computer Aided Analysis of the Influence of the Interfacial Bonding and Friction on the Shear Connection of Steel-Concrete Composite Bridge

The bond and friction of the interface between concrete slab and steel beam can affect the shear force values of the shear studs widely-used in steel-concrete composite bridge structures. The complex bond-slip relationships of the interface make the nonlinear finite element analysis become difficult. In this paper, computer aided method was proposed for the analysis of steel-concrete composite bridge with interfacial bonding and friction considered. A new type of cohesive zone model with the cementing bond and friction included is applied to simulate the complex interfacial behavior between concrete slab and steel beam. Cohesive interface element was then developed through the user subroutine in ABAQUS software. Then a continuous steel-concrete composite beam bridge model was analyzed with the proposed method. Load-deflection relationships of the steel-concrete composite structure, interfacial slips, interfacial shear stresses, and shear force of shear connectors were investigated. Results showed that the bond and friction of the interface between concrete slab and steel beam can affect the shear force distributions of the shear connectors. Numerical analysis method proposed in this study can be used for the analysis and evaluation of the shear connectors used for steel-concrete composite bridge structures. Results of this study can be further applied to intelligent testing and monitoring. It can provide theoretical support for the data analysis of intelligent infrastructure operation and maintenance.