宽箱梁钢拱桥受力分析方法研究  

Study of Analysis Methods for Mechanical Behavior of Steel Arch Bridge with Wide Box Girder

作　　者：董冰[1] 苏庆田[2] 黎丁实[2] 刘元炜 

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092 [2]同济大学桥梁工程系,上海200092 [3]中交第三公路工程局有限公司,北京100107

出　　处：《桥梁建设》2013年第2期70-75,共6页Bridge Construction

摘　　要：为研究宽箱梁钢拱桥采用常规的二维或空间杆系有限元分析方法能否真实反映结构的受力特性,以南昌市艾溪湖大桥主桥(主跨108m,全钢结构的外倾式拱肋系杆拱桥,钢梁最大宽度73m)为背景,采用通用有限元软件ANSYS分别建立该桥杆系有限元模型与杆系板壳混合有限元模型,对比计算分析了不同荷载工况下拱肋以及主梁的受力情况。分析结果表明,2种模型均可用于拱肋的受力计算,但采用杆系模型时不能真实反映主梁的受力特点,需采用混合模型用于主梁受力分析。To study if the regular two-dimensional or the spatial link finite element methods for analysis of the steel arch bridge with wide box girder can truly reflect the mechanical behavior of the structure, the main bridge of Aixi Lake Bridge （a complete steel structure tied arch bridge with outward inclined arch ribs and with a main span being 108 m and the maximum width of its steel box girder being 73 m） in Nanchang City was cited as an example, the universal software ANSYS was used to respectively set up the link finite element model and the mixed link and plate-shell finite element model for the bridge and the mechanical behavior of the arch ribs and main girder under different load cases were comparatively calculated and analyzed. The results of the a-nalysis indicate that both the models can be used for calculation of the mechanical behavior of the arch ribs, however, the link model cannot truly reflect the characteristic of the mechanical behav-ior of the main girder and in the analysis of the mechanical behavior of the main girder, the mixed link and plate-shell model should be used.

关 键 词：拱桥 宽箱梁 钢结构 计算方法 有限元法 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]