西欧铁路桥梁上的无缝线路

JOINTLESS RAIL ON BRIDGE IN RALLWAY OF WEST EUROPE

本文系作者于《铁道工程学报》１９９８年第４期所撰“西欧铁路的整体连续性”一文的续作。文章对西欧铁路桥梁上无缝线路的纵向力变化的影响因素和计算方法、不设伸缩头的最大跨度、降低附加力的措施及轨道结构及伸缩接头的新构思做了介绍。作者在介绍国际铁路联合组织（ＵＩＣ）对桥上无缝线路的设计原则时，特别指出了其关于桥上钢轨附加力限值（包括拉力和压力）、梁轨相对位移限值、不设钢轨伸缩头时简支梁的最大跨度的修改有十分重要的意义。

This paper is a continuous part of the thesis “Integral Continuity of Railway in West Europe” written by the author,which was issued in No. 4 of the” Journal of the Railway Engineering Society” in 1998. In this paper, the following articles are introduced:the influence factors of the longitudinal force on jointless rail on bridge in railways of West Europe and its calculating method, the maximum span of bridge having jointless rail on bridge without expansion joints,measures for reducing the additional forces, track structure, new concept on expansion joints,etc .As the design principles for jointless rail on bridge by UIC are introduced,the author points out especially the important meanings concerned with the ultimate value of additional forces (including tension and compression), the ultimate value of the relative displacement of rail on bridge beams, the maximum span of simply supported beam without expansion joints, etc.