尼尔森体系系杆拱桥结构分析  

Structural Analysis of Tied Arch Bridge of Nielsen System

作　　者：张谢东[1] 曹鹏[1] 许精文 

机构地区：[1]武汉理工大学交通学院,湖北武汉430063 [2]中交集团公路一局,北京065201

出　　处：《桥梁建设》2009年第6期23-26,共4页Bridge Construction

摘　　要：下承式尼尔森体系系杆拱桥造型美观,结构形式新颖,具有较大的承受超载和偏载的能力,运用MIDAS/Civil程序计算分析尼尔森拱在荷载作用下的索力分布,通过对比尼尔森体系拱桥和洛泽式拱桥的内力和变形,对下承式拱桥的吊杆布置方式选择提出建议;并对一座在建尼尔森体系系杆拱桥按高速铁路规范验算拱桥主体结构的刚度及强度,验算结果均满足规范要求,同时也验证了尼尔森体系拱桥能较好地满足高速铁路对桥梁结构的刚度和动力特性的要求。The through tied arch bridge of Nielsen system has attractive configuration and novel structural form and has relatively great capacity of supporting overload and unbalanced load. The program MIDAS/Civil is used herewith to calculate and analyze the suspender force distribution of the tied arch bridge under the action of loading. Through the comparison of the internal force and deformation of the arch bridges of Nielsen and Lohse systems, some suggestions on the arrangement of the suspenders of the bridge are raised and the rigidity and strength of the major structure of a tied arch bridge of Nielsen system that is being constructed are checked by calculatiion in accordance with the specifications of high-speed railways. The results of the checking indicate that both the rigidity and strength can satisfy the requirements in the specifications. Meanwhile, it is also verified that the arch bridge can well satisfy the rigidity and dynamic behavior of bridges required by the high-speed railways.

关 键 词：拱桥 尼尔森拱 洛泽拱 竖向刚度 影响线 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]