大跨度悬索桥变形与振动监测系统设计与实施

Design and Implementation of Deformation and Vibration Monitoring System for Long Span Suspension Bridge

概述武汉阳逻长江大桥健康监测系统设计,分析其实施过程中变形和振动在线监测系统在运营过程中的监测成果,为充分利用大跨度悬索桥健康监测系统积累经验。分析该桥在实测温度作用下,主缆和加劲梁竖向变形效应、主塔和加劲梁顺桥向变形效应,为大桥后续运营中整体温度变形评估、支座和伸缩缝的工作状态评估积累"指纹档案";对汶川地震作用下的大桥实测振动响应进行分析,结果表明大桥地震响应在设计范围之内,震后大桥工作状态未发生改变。

The design of the health monitoring system （HMS） for Wuhan Yangluo Changjiang River Bridge is outlined and the monitoring results yielded from the deformation and vibration on-line monitoring system used in operation of the Bridge in the implementation of the HMS are analyzed to accumulate experiences for taking the full advantage of the HMS for long span suspension bridges. The vertical deformation effect of the main cables and stiffening girder and the longitudinal deformation effect of the towers and stiffening girder of the Bridge under the action of the measured temperatures are analyzed to provide the ＂fingerprint files＂ for future assessment of the global temperature deformation and working conditions of the bearings and expansion joints in the follow-up operation of the Bridge. The measured vibration response of the Bridge subjected to the seismic waves from the Wenchuan Earthquake are also analyzed and the results of the analysis indicate that the seismic response of the Bridge is still within the designed range and the working conditions of the Bridge after the Earthquake remain unchanged.