摘要
以九江长江公路大桥主跨钢箱梁结构为研究对象,通过对实桥结构的有限元分析,确定了能够反映正交异性钢桥面板U肋与桥面板焊缝连接处受力状态的疲劳试样;依据理论分析和静载试验,获得了加载载荷与研究部位应力的对应关系;通过疲劳试验得到了该结构细节的疲劳破坏形式、应力-寿命曲线及容许应力幅值,为大桥的疲劳寿命评估、健康检测及养护维修提供依据,也为其它桥梁设计提供参考.
The main span steel box girder of Jiu-jiang highway bridge over Yangtze river is studied in this pa- per. Through finite element analysis on the real bridge structure, the fatigue specimen which can reflect stress state of rib-to-reck welded joints of orthotropic steel bridge deck is made. Based on the theoretical analysis and static load test ; the corresponding relationship of the load and stress of research part is gotten. The fatigue fail- ure form of the structure detail, stress -life curve and allowable stress amplitude are obtained by the fatigue test. The result can be used for the evaluation of fatigue life, health detection and maintenance and repair of the bridge, which can also be used as reference for the design of other bridges.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2013年第2期89-93,共5页
Journal of Zhengzhou University（Engineering Science）
基金
江西省交通运输厅重点科研资助项目(2010C00003)
