文章以某大跨度钢箱拱桥为背景,针对钢与混凝土结合部设计制作局部足尺模型,并进行混合有限元分析和加载试验,研究了钢与混凝土结合面处的相对滑移、过渡段应力分布状态。结果表明,该钢与混凝土结合部构造合理,结合可靠;作用力传递明确,具有很强的承载能力;连接件能够有效地承担钢与混凝土之间的作用力。试验结果为该桥提供了实测数据,并可作为同类结构的设计参考。 In this paper, a large-span steel box arch bridge is taken as a background, a local full-scale model is designed for the joint of steel and concrete, and mixed finite element analysis and loading test are carried out to study the relative slip at the interface between steel and concrete, Distribution status. The results show that the joint between steel and concrete is reasonable and reliable, the force transfer is clear, and the bearing capacity is strong. The connection can effectively bear the force between steel and concrete. The test results provide the bridge with the measured data, and can be used as a reference for the design of similar structures.