异形独塔斜拉桥张拉顺序研究

Study on Tensioning Sequence of Cable for Abnormal Single Pylon Cable Stayed Bridge

摘要: 非对称的异形斜拉桥，拉索的张拉顺序问题十分复杂。斜拉桥是高次超静定结构，结构随施工不断变化，后续拉索的张拉会影响已施工结构的受力状态。对于有背索的斜拉桥，确定背索的张拉时机很关键。通过对各种拉索张拉方案的施工阶段分析，比较各种方案下的拉索应力、主梁及主塔应力、变形等表征桥梁受力状态的参数，获得最优的拉索张拉方案，为施工过程提供指导，节省了施工时间。

Abstract: The tension sequence problem of the abnormal cable stayed bridge is very complicated. As cable stayed bridges are highly statically redundant structures, the structure systems are constantly changing with the construction process and the tension of the cable will affect the stress state of the structure. And it is important to determine the tension time of the back cable in the cable stayed bridge. In this paper, we make a construction stages analysis of different tension schemes, and compare various solutions by the parameters of the stress state of the bridge, like the stress of the cable, main girder and the main tower stress and deformation and so on. At last, we get the optimal cable tension schemes, which will provide guidance for the construction process and be time saving.