基于BDS/GPS/IBIS-S数据桥梁变形监测分析

Analysis of bridge deformation monitoring based on BDS/GPS/IBIS-S data

针对桥梁结构健康状况评估,本文基于某桥梁变形监测实例,利用GPS/BDS/IBIS-S三种技术手段对其进行动态变形监测,并且利用短时傅里叶变换对其进行时频分析。经研究发现,三种技术手段可精确获取桥梁动态变形信息,其中IBIS-S获取的数据精度最高,桥梁水平北方向变形小于竖直方向,桥梁中间变形情况大于两侧;短时傅里叶变换能够准确识别桥梁在监测时间内的瞬时频率,为后续桥梁的维护与修缮提供有效的数据支撑。

Aiming at the assessment of the health status of the bridge structure,this paper introduce an integrated method for bridge deformation monitoring based on a real example.It uses GPS/BDS/IBIS-S,the three technical means to monitor dynamic deformation of bridges,and applies short-time Fourier transform frequency analysis.The application results show that three technical methods can accurately obtain bridge dynamic deformation data.Among them,the data obtained by IBIS-S has the highest accuracy.The deformation in the horizontal north direction of the bridge is less than the vertical direction,and the deformation in the middle of the bridge is greater than that on both sides.By short-term Fourier transform,it can accurately identify the instantaneous frequency of the bridge during the monitoring time,and provide effective data support for subsequent bridge maintenance and repair.