Research on Wind Resistance of Stiff-Skeleton Arch Ring of Long-Span Concrete-Filled Steel Tubular Arch Bridge During Vertical Rotation Construction

被引：0
|
作者：
Wei Y. [1 ]
Jin Z.-K. [1 ]
机构：
[1] China Railway Engineering Design and Consulting Group Co., Ltd., Beijing
来源：
Bridge Construction | 2023年 / 53卷 / 02期
关键词：
arch bridge; arch ring vertical rotation; finite element method; stiff skeleton of concrete-filled steel tubes; wave wind cable; wind-induced response;
D O I：
10.20051/j.issn.1003-4722.2023.02.010
中图分类号：
学科分类号：
摘要：
The research focuses on the wind resistant safety of the long-span concrete-filled steel tubular arch bridge during the vertical rotation construction of the stiff-skeleton arch ring. An existing bridge of similar type with a main span of 342 m is used as a case, to explore the wind resistance of the stiff-skeleton arch ring during vertical rotation construction and the wind protection measures. In accordance with the characteristics of vertical rotation construction, the finite element models of two most unfavorable construction conditions (the critical state of vertical rotation of the arch ring and the pre-closure state of the arch ring) were developed in ANSYS to calculate the wind responses of the structure. Wave wind cables were recommended to improve the wind-resistant stability of the bridge. It is shown that under these two most unfavorable conditions, there is significant transverse displacement at the arch crown and stresses in the tie rods of arch springing pivot during vertical rotation construction due to the cross wind. The forces of the wave wind cables meet the requirements, which are able to ensure the safety of vertical rotation construction. The cross-sectional area of the wave wind cable exerts minor influence on the stresses in the tie rods of arch springing pivot, but significant influence on the arch-crown transverse displacement. Considering the uneven tension of wave wind cables, it is proper to enlarge the cross-section of the wave wind cable to enhance the overall wind resistant safety margin of the bridge. © 2023 Wuhan Bridge Research Institute. All rights reserved.
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页码：75 / 81
页数：6
相关论文
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