基于InSAR的南京大胜关大桥纵向位移监测与分析
发布时间：2019-07-03 09:33
【摘要】：为解决传统桥梁位移监测方法传感器数量有限、监测信息不全面以及监测成本高等问题,以京沪高铁南京大胜关大桥为对象,研究了基于合成孔径雷达干涉(In SAR)的大跨桥梁结构纵向位移监测方法.利用欧空局Sentinel-1A卫星IW模式影像,建立了适用于大跨桥梁纵向位移监测的In SAR时间序列分析方法,得到了全桥1 723个相干目标的纵向位移信息.分析结果表明,大桥纵向位移主要由热膨胀引起,采用In SAR技术可以准确识别全桥纵向位移,且支座处纵向位移与结构温度的相关性模型与该桥支座位移传感器建模结果吻合.
[Abstract]:In order to solve the problems of limited number of sensors, incomplete monitoring information and high monitoring cost of traditional bridge displacement monitoring methods, the longitudinal displacement monitoring method of long-span bridge structures based on synthetic aperture radar interferometric (In SAR) is studied, taking Nanjing Dasheng Gate Bridge of Beijing-Shanghai High Speed Railway as the object. Based on the IW mode image of Sentinel-1A satellite, a In SAR time series analysis method for longitudinal displacement monitoring of long-span bridges is established, and the longitudinal displacement information of 1723 coherent targets of the whole bridge is obtained. The analysis results show that the longitudinal displacement of the bridge is mainly caused by thermal expansion. In SAR technique can be used to accurately identify the longitudinal displacement of the whole bridge, and the correlation model between longitudinal displacement and structural temperature at the support is in good agreement with the modeling results of the displacement sensor of the bridge support.
【作者单位】： 河海大学地球科学与工程学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家重点基础研究计划(973计划)资助项目(2015CB060000) 国家自然科学基金资助项目(41304025,51578138,51608258) 江苏省自然科学基金资助项目(BK20130831)
【分类号】：U446
，
本文编号：2509278
[Abstract]:In order to solve the problems of limited number of sensors, incomplete monitoring information and high monitoring cost of traditional bridge displacement monitoring methods, the longitudinal displacement monitoring method of long-span bridge structures based on synthetic aperture radar interferometric (In SAR) is studied, taking Nanjing Dasheng Gate Bridge of Beijing-Shanghai High Speed Railway as the object. Based on the IW mode image of Sentinel-1A satellite, a In SAR time series analysis method for longitudinal displacement monitoring of long-span bridges is established, and the longitudinal displacement information of 1723 coherent targets of the whole bridge is obtained. The analysis results show that the longitudinal displacement of the bridge is mainly caused by thermal expansion. In SAR technique can be used to accurately identify the longitudinal displacement of the whole bridge, and the correlation model between longitudinal displacement and structural temperature at the support is in good agreement with the modeling results of the displacement sensor of the bridge support.
【作者单位】： 河海大学地球科学与工程学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家重点基础研究计划(973计划)资助项目(2015CB060000) 国家自然科学基金资助项目(41304025,51578138,51608258) 江苏省自然科学基金资助项目(BK20130831)
【分类号】：U446
，
本文编号：2509278
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2509278.html
