轨道专用大跨径斜拉桥的承载能力

Research on Bearing Capacity of Long-span Cable-stayed Bridges for Tracks

为了对某城市轨道交通专用特大跨径斜拉桥承载力进行鉴定,以准确反映桥梁的结构性能,采用结构能力等效加载方法,以结构受力最不利位置实测的应变、挠度、残余变形等参数为研究对象,借助有限元分析模型,进行桥梁实际承载能力判断;并开展基于静载、动载试验荷载作用下的桥梁承载能力评价。结果表明,以上方法可以准确地评价桥梁结构的实际承载能力。

In order to identify the bearing capacity of a special long-span cable-stayed bridge for urban rail transit,and accurately reflect the structural performance of the bridge,the structural capacity equivalent loading method was adopted.And the strain,deflection and residual deformation at the most unfavorable position of the structural stress were taken as the research object and the actual bearing capacity of the bridge was judged with the help of the finite element analysis model.The bearing capacity evaluation of the bridge based on the influence of the static load and dynamic load test was carried out.The results show that the above methods can accurately evaluate the actual bearing capacity of the bridge structure.