中低速磁浮变刚度试验钢箱梁结构研究  

Research on structure of variable stiffness experimental steel box girder for medium and low speed maglev traffi

作　　者：张文斌 Zhang Wenbin

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《现代城市轨道交通》2023年第4期45-49,共5页Modern Urban Transit

摘　　要：为探索钢结构桥梁对中低速磁浮的适应性和经济性,开展中低速磁浮采用中等跨度钢桥跨越立交铁路、市政道路等基础性研究,为将来中低速磁浮采用大跨度钢桥跨越大江大河或其他障碍打下基础。本次拟在某中低速磁浮试验线上将原2孔25 m混凝土简支梁改建替换为2孔25 m多功能变刚度试验钢箱梁,开展各项静力和动力性能限值标准研究,同时,采用理论分析及实桥试验验证相结合的方法,突破现行《中低速磁浮交通设计规范》中的相关限值,研究放宽简支梁竖向挠度、梁端转角等限值标准的可行性,获得更加经济合理的中低速磁浮桥梁竖向挠度、梁端转角等刚度限值要求,进一步提高中低速磁浮桥梁的经济性和美观性。In order to explore the adaptability and economy of steel structure viaducts for medium and low speed maglev traffi c,basic research has been carried out on the use of medium span steel viaducts for medium and low speed maglev traffi c to overpass railways,municipal roads,etc.,laying the foundation for the future use of large span steel viaducts for medium and low speed maglev traffic to overpass large rivers or other obstacles.Here,it is proposed to replace the original 2-hole 25m concrete simply supported girder with a 2-hole 25m multifunctional variable stiffness experimental steel box girder on a medium and low speed maglev test line,and carry out research on various static and dynamic performance limit values.The method of combining theoretical analysis and actual bridge test verifi cation is adopted.At the same time,in accordance with the relevant limit values in the current"Code for design of medium and low speed maglev traffi c",research is conducted to relax the vertical defl ection of the simply supported girder.The feasibility of restrictions such as girder end rotation angles is studied,and more economical and reasonable requirements for the vertical defl ection and stiffness limit such as girder end rotation angles of medium and low speed maglev viaducts are studied to further improve the economy and aesthetics of medium and low speed maglev viaducts.

关 键 词：中低速磁浮 试验钢箱梁 轨道梁 结构研究 刚度限值 

分 类 号：U237[交通运输工程—道路与铁道工程]