悬索桥用于铁路桥梁的可行性分析

发布时间：2018-05-30 03:23

本文选题：悬索桥 + 铁路桥　；参考：《桥梁建设》2017年02期

【摘要】：为探讨悬索桥是否适用于我国的铁路桥梁,从结构受力、抗风与抗震、结构刚度、梁端转角、车桥耦合振动分析、轨道几何形位评价几方面验证了其可行性。针对我国铁路桥梁的特征提出采用悬索桥的相关建议:(1)主缆直径不超过1.3m,可采取的措施包括主缆取合适的强度安全系数并配合使用防腐除湿系统、采用超高强度钢丝、采用多根主缆;(2)桥塔及锚碇与公路悬索桥受力机理相同,按规范设计;(3)加劲梁疲劳应力幅较大,应处理好疲劳设计;(4)抗风与抗震计算应满足规范要求,必要时需通过风洞试验验证以及设置阻尼器使地震与快速荷载作用下伸缩装置参数在正常范围内;(5)结构刚度可参考建议标准,梁端转角应满足规范要求;(6)车桥耦合振动分析、轨道几何形位评价应满足列车运行的轨道平顺性要求。
[Abstract]:In order to discuss whether suspension bridge is suitable for railway bridges in China, the feasibility of the suspension bridge is verified from the following aspects: structural force, wind resistance and earthquake resistance, structural stiffness, beam end angle, vehicle-bridge coupling vibration analysis, track geometry and position evaluation. In view of the characteristics of railway bridges in China, the suggestion of adopting suspension bridges is put forward. The diameter of the main cable is not more than 1.3 m. The measures that can be taken include taking appropriate strength safety factor of the main cable and using anticorrosive and dehumidifying system, and adopting ultra-high strength steel wire. The stress mechanism of the bridge tower and Anchorage is the same as that of the highway suspension bridge, and the fatigue stress amplitude of the stiffened beam is larger according to the code design, so the fatigue design should be handled well and the calculation of wind resistance and earthquake resistance should meet the requirements of the code. When necessary, it is necessary to verify by wind tunnel test and install dampers to make the structural stiffness of telescopic device parameters in normal range under earthquake and rapid load can refer to the suggested standard, and the beam-end rotation angle should meet the requirements of the specification and the analysis of vehicle-bridge coupling vibration. The evaluation of track geometry and position should meet the requirements of track ride comfort.
【作者单位】：中铁大桥勘测设计院集团有限公司;
【基金】：中国铁路总公司科技研究开发计划项目(2015G002-A)~~
【分类号】：U448.25

【相似文献】