悬挂式单轨交通大跨度桥梁轨道梁间横向联系影响分析
刘阳明
Influence Analysis of Lateral Connection between Track Beams of Suspended Monorail Transit Large-Span Bridges
LIU Yangming
-
作者信息:中铁第四勘察设计院集团有限公司， 430063， 武汉
-
Affiliation:China Railway Siyuan Survey and Design Group Co., Ltd., 430063, Wuhan, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2025.04.037
-
中图分类号/CLCN:TU311.3∶U232
-
栏目/Col:研究报告
摘要:
［目的］通常，悬挂式轨道交通左右幅轨道梁都是独立工作的，仅在桥墩处与桥墩联系在一起，跨中轨道梁相互之间没有联系，这对于小跨径轨道梁来说影响不大。然而，当出现大跨度轨道梁时，由于轨道梁截面较小，刚度较弱，主跨的两根轨道梁之间是否存在横向联系会极大地影响系统的动力响应。对此，有必要分析悬挂式单轨交通大跨度桥梁轨道梁间横向联系的影响。［方法］为探究桥梁主跨不同横系梁对悬挂式单轨交通系统的动力响应以及行车舒适度的影响，基于ANSYS有限元软件与Universal Mechanism多体动力学软件建立了80 m长的柔性吊杆拱桥及车辆模型进行联合仿真计算。分析了轨道梁间横系梁截面形式以及跨中左右幅横系梁数量为0根、1根、3根工况下系统的动力响应。［结果及结论］轨道梁横系梁截面的横向刚度对轨道梁的纵向位移贡献不大，但横系梁限制竖向位移的能力与竖向刚度成正比；轨道梁的动力响应与轨道梁主跨的横系梁密度呈负相关的关系；而主跨是否设置横系梁则对悬挂式单轨列车及桥梁的竖向动力响应影响更大；列车车速较低时，横系梁对列车横向响应优化较明显，而车速较高时则对列车竖向响应优化较明显。
Abstracts:
［Objective］ Generally, the left and right track beams of suspended rail transit work independently, and are only connected at the piers. The track beams in mid-span are not connected to each other, which has little effect on small-span track beams. However, when there are large-span track beams, due to their small cross-section and weak stiffness, whether there is a lateral connection between the two track beams of the main span will greatly affect the dynamic response of the system. In this regard, it is necessary to analyze the influence of the lateral connection between track beams in suspended monorail transit large-span bridges.［Method］ In order to explore the influence of different transverse beams in the bridge main span on the dynamic response and driving comfort of the suspended monorail transit system, based on Ansys finite element software and Universal Mechanism multi-body dynamics software, an 80 m long flexible suspender arch bridge and vehicle model is established for joint simulation calculation. The cross-sectional form of the transverse beam between track beams，and the dynamic response of the system under working conditions with 0, 1, and 3 transverse beams on the midspan left and right sides are analyzed.［Result & Conclusion］ The lateral stiffness of the transverse beam section of the track beam has little contribution to the longitudinal displacement of the track beam, but the ability of transverse beam to limit the vertical displacement is proportional to the vertical stiffness; the dynamic response of the track beam is negatively correlated with the transverse beam density of the main span track beam; and whether the main span is equipped with transverse beams has a greater impact on the vertical dynamic response of the suspended monorail vehicle and the bridge; with a lower vehicle speed, the transverse beam has a more obvious optimization on the vehicle lateral response, while with a higher vehicle speed, it will optimize the vehicle vertical response more obviously.
- 上一篇: 活动支座摩擦阻力对地铁连续梁桥上无缝线路的影响
- 下一篇: 宁波地铁窄基坑抗隆起稳定性及变形特性研究
过刊浏览
资料下载
友情链接