独塔混合梁斜拉桥承载力的检测与评定

Inspection and Evaluation of Load Bearing Capacity of a Single Pylon Hybrid Girder Cable-Stayed Bridge

祥云桥主桥为独塔钢-混凝土混合梁斜拉桥,为了评定其实际承载能力及在设计使用荷载下的工作性能,采用无损检测、静载试验及动载试验方法,对该独塔混合梁斜拉桥进行外观检测、线形测量及索力测试,并测定桥跨结构的静力效应及动力性能。结果表明:桥梁结构处于正常工作状态,桥面线形、索力差、结构刚度、强度等均满足规范要求;桥梁整体动力特性良好,承载能力满足设计及规范要求。

The main bridge of Xiangyun Bridge is a single pylon steel-concrete hybrid girder cable-stayed bridge. To evaluate the actual load bearing capacity of the bridge and its working performance under the designed service load, the methods of non-destructive inspection, static load testing and dynamic load testing were employed to carry out visual inspection, geometry measurement and cable force testing for the single pylon hybrid girder cable-stayed bridge, and to determine the static effect and dynamic performance of the bridge structure. The results indicate that the bridge structure is in the normal working state, the deck geometry, cable force differences, structural stiffness and strength all meet the code requirements. The bridge has good integral dynamic performance and the load bearing capacity can meet the design and code requirements.