正交异性钢桥面板节段模型疲劳性能试验研究  

Experimental Study on the Fatigue Performance of the Section Model of Orthotropic Steel Bridge Deck

作　　者：陶晓燕[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《中国铁道科学》2013年第4期22-26,共5页China Railway Science

基　　金：国家科技支撑计划项目(2008BAG07B04)

摘　　要：设计3个正交异性钢桥面板的节段模型,进行系统的静载试验和疲劳试验,研究不同构造对正交异性钢桥面板受力和疲劳性能的影响。结果表明:面板的厚度对U肋与面板连接焊缝构造的应力影响显著,建议正交异性钢桥面板的面板厚度取为14mm以上;横隔板的间距对横隔板与U肋焊缝交叉处的面外应力、横隔板的面外变形、中间U肋的竖向变形有直接的影响;弧形开孔处的应力随横隔板的厚度增加而降低;正交异性钢桥面板上由次应力引起的裂纹的扩展比较缓慢,不会直接影响整个桥面结构的承载能力;横隔板与U肋相交处上部留有过焊孔这一构造细节对正交异性钢桥面板的疲劳性能不利。In order to study the influence of different structures on the stress and the fatigue performance of orthotropic steel bridge deck, three section models were designed and the static and fatigue tests were carried out. Results show that the thickness of bridge deck has significant influence on the stress of the attachment weld between bridge deck and U rib. We suggest that the thickness of bridge deck should be more than 14 mm. The spacing of diaphragm plates directly influences the out-of-plane stress of the intersection between diaphragm plate and U rib attachment weld, the out-of-plane deformation of diaphragm plate and the vertical deformation of middle U rib. The stress of arc opening decreases with the increase of the thickness of diaphragm plate. The crack of orthotropic steel bridge deck caused by secondary stress grows slowly, and will not directly affect the bearing capacity of the whole bridge deck. It is disadvanta- geous to the fatigue performance of orthotropic steel bridge deck that welding holes are left in the upper intersection between the diaphragm plate and U rib.

关 键 词：钢桥 正交异性钢桥面板 节段模型 构造 静载试验 疲劳试验 受力 

分 类 号：U448.36[建筑科学—桥梁与隧道工程] U441.4[交通运输工程—道路与铁道工程]