预应力混凝土桥塔斜索锚固区空间应力分析

Spatial Stress Analysis of the Cable Anchorage Zone in a PC Tower

现代斜拉桥的桥塔往往采用混凝土结构，由于斜拉索强大的水平拉力作用，使得斜索在塔体的锚固构造处理变得十分关键．为此，以实际工程为背景，运用现代有限元方法和光弹模拟试验，对塔体斜拉索锚固区进行了空间应力分析，探讨了在强大斜拉索力作用下锚固区的受力特点，分析数据为塔体锚固构造设计提供了重要的参考依据．有限元分析与光弹试验结果比较表明。

Modern cable-stayed bridges usually use prestressed concrete towers. For the huge cable forces, the cable anchorage zone in a PC tower therefore becomes one of the key structural components of a cable-stayed bridge. Based on a practical engineering, the spatial stress distribution of the cable anchorage zone is analysed in detail by modern finite element method and a photoelasticity test. The rule of stress distribution of the zone subjected to huge cable forces is also discussed. The result can be used as an important reference for design.