关键词: 桥梁工程, 钢-混凝土组合结构, 有限元模拟, 黏结滑移, 推出试验

Abstract: Due to the complexity of a shear transfer problem of the contract interface between steel and concrete, there are various finite element simulation methods on the steel-concrete composite structure currently. However, most of the methods are either too complicated for technical problems or too experiential which depends on many test results to determine the parameters. Therefore, considering the idea of combination of practicality and accuracy, a method using specific hyper elastic virtual interface element was proposed to simulate the steel-concrete composite structure. And it also suggested the concrete plastic damage model can be adopted. The proposed method was applied to the numerical simulation of the mechanical property and interfacial shear force in the whole development process of composite structure shear connector’s push-out tests. The results show that the proposed method is feasible and reliable, which is applicable to the FE simulation of the steel-concrete composite structure considering the interfacial bond slip effect.

Key words: bridge engineering, steel-concrete composite structure, finite element simulation, bond slip, push out test