Research on Configuration of Stay Cables and Hanger Cables Intersection Zones in Hybrid Cable-Stayed Suspension Bridge

被引：0
|
作者：
Xiao H. [1 ,2 ]
He D. [1 ,2 ]
机构：
[1] China Railway Major Bridge Reconnaissance and - Design Institute Co.Ltd., Wuhan
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Bridge Construction | 2023年 / 53卷
关键词：
fatigue performance; finite element method; hybrid cable-stayed suspension bridge; intersection zone; load bearing condition; load bearing efficiency; rail-cum-road bridge; staggering arrangement;
D O I：
10.20051/j.issn.1003-4722.2023.S2.009
中图分类号：
学科分类号：
摘要：
In a hybrid cable-stayed suspension bridge, the conventional way is to allow the stay cables and hanger cables in the intersection zone to share anchor points, however, this configuration is not favorable to the fatigue performance of the end hangers and likely to generate great bending moments in side spans under dead and live loads. This paper presents a staggering layout of anchor points of the stay cables and hanger cables in the intersection zone. A real hybrid cable-stayed suspension rail-cum-road bridge with a main span of 1 488 m is used as a case to study the differences between the two ways of intersection zone configuration, in terms of vertical displacement of stiffening girder, stay cable forces, hanger cable forces, stiffness transition smoothness, bending moments of stiffening girder and pylons under live loads. The results demonstrate that the presented configuration exerts minimal influence on the vertical stiffness of the structure, but brings improved load bearing efficiency, sound fatigue performance of the end hanger cables, better smoothness of stiffening girder and reduced bending moments in the stiffening girder and pylons under live loads. © 2023 Wuhan Bridge Research Institute. All rights reserved.
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页码：58 / 64
页数：6
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