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桥梁结构不同位置的动态位移能够实时反应悬索桥结构的受力性能和工作状态。介绍润扬大桥健康监测系统中GPS子系统布设方案,该系统用于监测大桥在各种荷载作用下的变形。分析桥梁结构在不同环境荷载作用下的结构反应。对GPS监测数据进行频谱分析,识别出结构的基频,并与有限元模型分析结果及振动传感器所测数据分析结果相比较,说明利用GPS可以有效、准确地监测桥梁工作状态,为该桥的承载能力、工作状态和耐久性评估提供参考依据。
The dynamic displacement at different positions of the bridge structure can reflect the mechanical properties and working conditions of the suspension bridge structure in real time. The layout of GPS subsystem in Runyang Bridge Health Monitoring System is introduced. The system is used to monitor the deformation of the bridge under various loads. The structural response of bridge structure under different environmental loads is analyzed. Spectrum analysis of GPS monitoring data to identify the structure of the fundamental frequency and finite element model analysis results and vibration sensor measured data analysis results compared with the use of GPS can be effectively and accurately monitor the working status of the bridge for the bridge Bearing capacity, work status and durability assessment provide a reference.