基于监测数据的大跨径悬索桥主缆和主梁空间变位分析  

Spatial Displacement Analysis of Main Cable and Girder of Long-span Suspension Bridge based on Monitoring Data

作　　者：沃晓楠 王凯 WO Xiao-nan;WANG Kai(CCCC Highway Consultants Co.Ltd.,Beijing 100010,China)

机构地区：[1]中交公路规划设计院有限公司,北京市100010

出　　处：《公路》2024年第11期111-117,共7页Highway

基　　金：交通运输部跨海桥梁长期性能交通运输行业野外科学观测研究基地。

摘　　要：作为大跨度悬索桥的主要承重构件,主缆及主梁的线形反映着结构整体的空间变位形态,是影响结构服役状态的重要评估指标。基于桥梁监测数据和定期空间变位几何观测数据,针对恒载状态主梁线形及主缆线形开展分析研究,通过对不同时间同一温度下主梁、主缆的恒载线形对比,评估一定时间段内桥梁结构空间变位情况。结果表明,该桥的主缆及加劲梁的线形及变形幅度一致性良好,为结构的安全评估及维护工作提供了基础。As main load-bearing components of long-span suspension bridges,the geometry of main cable and main beam reflect the global spatial deformation of the structure,which affects the state of structure in service.Based on the monitoring data of the bridge as well as periodic spatial displacement geometry observations,in the paper the deformation of main beam and main cable under dead load are analyzed.By comparing the geometry of main beam and main cable under dead loads at different time and the same temperature,the spatial position variation of bridge is evaluated over a period of time.The results show that the alignment and deformation amplitude of the main cable and stiffening beam of the bridge are in good agreement,which provides a basis for the safety evaluation and maintenance of the structure.

关 键 词：桥梁工程 结构健康监测 悬索桥 结构空间变位 主梁线形及主缆线形 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U446.2[交通运输工程—道路与铁道工程]