大跨度斜拉桥拉索及锚固系统几何计算研究  

Research of Geometry Calculation of Stay Cable and Anchor System of Long-span Cable-stayed Bridge

作　　者：刘厚军[1] 肖海珠[1] 

机构地区：[1]中铁大桥勘测设计院集团有限公司,武汉430050

出　　处：《高速铁路技术》2014年第6期15-20,共6页High Speed Railway Technology

摘　　要：斜拉桥的拉索及锚固系统是结构受力的关键部位,其几何参数也是设计需要精细化计算的重要内容。文章综合考虑斜拉索的垂度效应、空间索面、各种类型的锚固系统,采用一种迭代算法求解斜拉索索长、斜拉索在塔梁两端的空间角度等几何参数。通过这一工作保证实际结构的受力与计算模型一致,保证斜拉索索长的计算正确、斜拉索锚固系统的受力合理以及斜拉索导管的位置准确。算例中分别采用文中推荐的算法及假定斜拉索为直线的方法分别进行几何参数的计算。通过对比分析,两者差距明显,所以采用更高精度的算法来求解大跨度斜拉桥拉索及锚固系统的几何参数是非常有意义的。The stay cable and anchor system are key parts of cable-stayed bridge,and their geometry calculations are also important content of delicacy design. This article discusses an iterative algorithm to calculate the cable lengeh, the cable’s space angle in the cable ends and so on by consdering the sag effects of cable, the spatial cable and various types of anchor system. This work can guarantee the actual structure more similar to the calculation model, it can also ensure that the cable length calculations are correct, the structures of anchor system are rational and the positions of the cable condult are correct. In the example, geometry parameters are calculated with two methods,one is the method in this re-search,the other is a method that the cable’s shape is assumed as a line. The difference is significant by comparing the result of the above methods,so it is meaningful to calculate the geometry parameters of stay cable and anchor system by a high precision algorithm.

关 键 词：斜拉桥 斜拉索 锚固系统 几何计算 垂度效应 

分 类 号：TU448.27[建筑科学—岩土工程]