城际铁路常用跨度桥梁梁体竖向刚度限值研究  

On Vertical Stiffness Limit Values of Beam Body of Bridges With Regular Spans for Inter-City Railways

作　　者：杜宝军[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300402

出　　处：《中国铁路》2017年第3期68-74,共7页China Railway

摘　　要：结合城际铁路设计荷载标准的制定,对城际铁路常用跨度桥梁梁体竖向刚度限值进行研究;根据城际铁路实际情况,开展车桥动力分析,并结合国外有关成果,提出满足城际铁路乘坐舒适度的梁体竖向刚度限值;指出梁部结构在ZK、ZC竖向设计静活载作用下,梁体的竖向挠度建议限值。结论指出:(1)挠度限值的制定应按设计荷载、运营荷载、梁体基频等综合考虑配套研究;(2)在运营荷载作用下,梁体动力加速度是梁体挠度限值制定的依据。This paper studies the vertical stiffness limit values of the beam body of bridges with regular spans for inter-city railways, based on the development of intercity railway design load standards. [n accordance with the actual conditions of inter-city railways, it analyzes the train-bridge dynamic interaction and, considering relevant scientific researches carried out by international counterparts, puts forward the vertical stifthess limit values of the beam body which meet the requirements on riding comtbrt of intercity trains. It further proposes vertical deflection limit values of the beam body with the beam structure under ZK/ZC designed vertical static live load. It concludes that： （1） the deflection limit values shall be set considering design load, service load and limdamental frequency of the beam body; （2）Under service load, the dynamic acceleration of tile beam body constitutes the basis for determining the deflection limit values of the beam body.

关 键 词：城际铁路 常用跨度 舒适度 梁体竖向刚度 限值标准 

分 类 号：U239.5[交通运输工程—道路与铁道工程] U442.51[建筑科学—桥梁与隧道工程]