正交异性钢桥面板横隔板开孔部位疲劳性能研究  

Research on Fatigue Properties of Transverse Diaphragm of Orthotropic Decks in Steel Box Girder

作　　者：张梁[1] 高科[2] 谢红兵 苏宗贤 吴伟胜[1] 

机构地区：[1]中交公路规划设计院有限公司,北京市100088 [2]西南交通大学,成都市610031 [3]港珠澳大桥管理局,广州市519015

出　　处：《公路》2014年第10期6-11,共6页Highway

基　　金：国家科技支撑计划;项目编号2011BAG07B03

摘　　要：疲劳问题是正交异性钢桥面板应用和发展所面临的重要课题。以典型的正交异性桥面板钢箱梁桥——港珠澳大桥为研究对象,通过足尺试件模型,校准了钢桥面板中横隔板挖孔分析的有限元模型。选取最易发生疲劳损伤的U肋与横隔板连接处的两个疲劳细节为研究对象,利用校准的有限元模型分析不同开孔以及各开孔纵肋和横隔板厚度等变化对该处疲劳的影响,进而为优化设计提供理论依据。分析表明:仅就应力水平而言,Eurocode推荐的铁路孔型3和文中给出的典型圆形孔型7较好;但是,综合考虑应力和加工制造等原因,孔型1即港珠澳大桥所采用的孔型占优。Abstract. Fatigue is one of the most important issues for steel orthotropic bridge deck. Based on the steel box girder of the Hong Kong-Zhuhai-Macao Bridge, which is taken as study subject, steel orthotropic bridge deck are studied by full-scale model tests. By the test, 3D nonlinear finite element model on testing the analysis of transverse diaphragm is aligned. With the 3D models, two predominant types of vulnerable fatigue details of steel orthotropic bridge deck are selected to study if different grooves and different thickness of longitudinal rib and transverse diaphragm have an effect on the fatigue here. Finally, some theoretical basis can be provided to the optimization design. It turns out that the groove 3 recommended for railway bridges by Euro code and the typical circular groove 7 recommended by this paper are appropriate with respect to stress level, while the groove 1 has an advantage on both stress level and processing and manufacturing.

关 键 词：钢箱梁 正交异性桥面板 疲劳特性 模型试验 疲劳优化设计 

分 类 号：U443.32[建筑科学—桥梁与隧道工程]