悬索桥鞍槽纵向曲线设计  

Longitudinal Curve Design of Cable Saddles in Suspension Bridge

作　　者：魏建东[1] 许惟国[1] 刘忠玉[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]郑州大学土木工程学院,河南郑州450002

出　　处：《西南交通大学学报》2005年第2期215-219,共5页Journal of Southwest Jiaotong University

摘　　要：为更加合理地设计悬索桥的鞍槽纵向曲线,提高悬索桥施工控制的精度,基于弹性悬链线的解析解,建立了具有复合圆弧曲线的鞍槽纵向曲线设计方法.在拟定主索鞍处转点到两切点的距离或水平距离,或拟定散索鞍弧段半径后,根据索鞍的受力平衡条件及两圆弧段之间的几何关系,建立了求解主索鞍鞍槽纵向曲线的一元非线性方程及散索鞍的二元非线性方程组.对应每种鞍座的设计还建立了相应的高效作图法,指出主索鞍的设计以拟定转点到切点水平距离最简单.最后,为了证明公式的正确性,给出了1个算例.To reasonably design the longitudinal curves of cable saddles and improve the control precision in construction, the design of longitudinal curves composed of compound arcs was developed based on the analytical solutions for elastic catenary. Under the condition of given distances or horizontal distances between the turning point and the two tangential points on main saddle, or given arc radii of anchorage cable saddles, a nonlinear equation corresponding to a main saddle and two nonlinear equations corresponding to anchorage saddle were respectively derived from equilibrium conditions and geometrical relations. The corresponding drawing method was proposed to each case. The result shows that it is easier to design a main saddle if the horizontal distances are given.

关 键 词：悬索桥 主缆 索鞍 鞍座 数值方法 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]