自锚式悬索桥钢-混结合段受力性能研究

Study on Mechanical Behavior of Steel-concrete Combined Section of Self-anchored Suspension Bridge

摘要:

混合梁在自锚式悬索桥中具有广泛应用，其钢-混结合段是影响结构整体受力的关键部位。以主跨336 m的上海嘉松大桥为工程背景，建立了考虑相对滑移的钢-混结合段板壳-实体有限元模型，分析了混凝土、钢结构应力及抗剪连接件的剪力分布规律，研究了结合段受力性能，并提出了连接件最大剪力简化计算方法。

Abstract:

The composite girder is widely used in self-anchored suspension bridge. Its steel-concrete combined section is the key part affecting the overall mechanical behavior of the structure. Taking Shanghai Jiasong Bridge with a main span of 336 m as the engineering background, a shell-solid finite element model considering the relative slippage of steel-concrete combined section is established. The distribution law of the stress of concrete and steel structure, and the shearing force of resisting shear connector is analyzed. The mechanical behavior of the combined section is studied. And the simplified calculation method of the maximum shearing force of connector is proposed.