动态检测数据在转体桥挠曲变形监测中的应用

基于沪杭高铁转体桥的挠曲变形监测数据及上部轨道的动态检测数据，对比分析了转体桥挠曲变形幅值与动态检测长波高低不平顺幅值的关系，结果表明：挠曲变形幅值与长波高低不平顺幅值存在差异，但在主跨中心与边跨中心的变形趋势相同；在主跨中心与边跨中心处，挠曲变形幅值与长波高低不平顺幅值间的相关系数均超过0.97，呈现出高度相关性。根据动态检测长波高低数据，对转体桥主跨中心和两边跨中心处一年内的挠曲变形幅值进行估算，并与实际值对比，平均误差仅为1.7 mm。研究认为利用动态检测长波数据对转体桥挠曲变形进行推算，快速准确，是一种有效的辅助监测手段。

Application of Dynamic Inspection Data in Deformation Monitoring for the Swing Bridge

According to the deformation monitoring data of the swing bridge on Shanghai-Hangzhou high-speed railway and the dynamic inspection data, the relationship between bridge deformation and long wavelength irregu-larity of track vertical profile is analyzed. The contrast results show as follows：there exist differences in deforma-tion and long wavelength irregularity of track vertical profile, while the changing trend in main span and in side span is the same;the correlation coefficients of deformation and long wavelength irregularity of track vertical pro-file are above 0.97 in the center of main span as well as side span. Deformation of the swing bridge in one year is estimated with the dynamic inspection data of long wavelength irregularity of track vertical profile. In comparison with the error analysis of actual value, the average error is only 1.7mm. It is suggested that estimating deformation of the swing bridge by dynamic inspection data of long wavelength irregularity of track vertical profile is an effec-tive method for deformation monitoring.