悬索桥架设过程中吊索长度调整的计算方法

悬索桥架设过程中，当主塔、主缆的施工误差超过规定的限值时，需通过吊索长度的调整，以消除这些误差对加劲当众施工的影响，保证成桥后桥面线形符合设计要求，为此提出了一种实用的调整吊索长度的计算方法，该法中成桥状态结构的几何形状及内力发２个阶段用几休非线性有限元法模拟整个架设过程，迭代得到，算例结果表明该法具有较高精度。

Calculating Method for Adjusting the Length of Hangers during the Erection of Suspension Bridges

During the construction of suspension bridges, it is required that the length of hangers be adjusted so as to eliminate the effects on the stiffening-girder erection caused by the construction errors of towers and main cables, and to guarantee the curve of stiffening-girder meets the design requirement for completed bridge, when these errors exceed the tolerances. Thus, a practical approach of adjusting the length of hangers is proposed. In it, the geometry and internal force for completed bridge is obtained with an iterative procedure in which the whole erection process is divided into two stages and modeled by the geometric nonlinear finite element method. The implementation example shows that this approach is more precise.