黄声享, 杨保岑, 游新鹏. GPS动态几何监测系统在桥梁施工中的应用研究[J]. 武汉大学学报 ( 信息科学版), 2009, 34(9): 1072-1075.
引用本文: 黄声享, 杨保岑, 游新鹏. GPS动态几何监测系统在桥梁施工中的应用研究[J]. 武汉大学学报 ( 信息科学版), 2009, 34(9): 1072-1075.
HUANG Shengxiang, YANG Baocen, YOU Xinpeng. Applications of GPS Dynamic Geometric Deformation Monitoring System to Sutong Bridge[J]. Geomatics and Information Science of Wuhan University, 2009, 34(9): 1072-1075.
Citation: HUANG Shengxiang, YANG Baocen, YOU Xinpeng. Applications of GPS Dynamic Geometric Deformation Monitoring System to Sutong Bridge[J]. Geomatics and Information Science of Wuhan University, 2009, 34(9): 1072-1075.

GPS动态几何监测系统在桥梁施工中的应用研究

Applications of GPS Dynamic Geometric Deformation Monitoring System to Sutong Bridge

  • 摘要: 介绍了苏通大桥施工期GPS动态几何监测系统的构成及监测点的布置方案,结合系统在现场应用的情况,对其动态监测的精度进行了统计分析。结果表明,水平方向位移的精度优于±5mm,高程方向优于±10mm。通过对索塔的温度响应进行分析,对上部结构施工给出了有益的建议。利用频谱分析法计算了桥梁的模态频率,与有限元模型的比较结果表明,GPS系统的模态参数识别结果是可靠的。

     

    Abstract: We introduce a structure of the GPS real-time dynamic geometric deformation monitoring system and the instrumentation deployment.Accuracy of the monitoring system is estimated based on the data collect during Sutong Bridge construction.The results indicate that the accuracy is better than 5-10 mm in horizontal and vertical directions,respectively.Displacement responses of the tower caused by thermal loading effects are analyzed and some advice is given.Spectral analysis is used to compute the modal frequency of the bridge pylon tower and the cantilevers using GPS monitoring data.Dominant frequencies derived from GPS monitoring data and the finite element model are compared and the results indicate that identification of modal parameters using GPS data is reliable.

     

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