Damage alarming of long-span suspension bridge based on GPS-RTK monitoring  

作　　者：缪长青 王蔓 田洪金 冯兆祥 陈策 

机构地区：[1]School of Civil Engineering,Southeast University [2]Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education,(Southeast University) [3]Jiangsu Provincial Transportation Engineering Construction Bureau [4]Jiangsu Taizhou Bridge Ltd.Co.

出　　处：《Journal of Central South University》2015年第7期2800-2808,共9页中南大学学报（英文版）

基　　金：Project(51078080)supported by the National Natural Science Foundation of China;Project(20130969010)supported by Aeronautical Science Foundation of China;Project(2011Y03-6)supported by Traffic Transportation Technology Project of Jiangsu Province,China;Project(BK2012562)supported by the Natural Science Foundation of Jiangsu Province,China

摘　　要：Structure damage identification and alarming of long-span bridge were conducted with three-dimensional dynamic displacement data collected by GPS subsystem of health monitoring system on Runyang Suspension Bridge.First,the effects of temperature on the main girder spatial position coordinates were analyzed from the transverse,longitudinal and vertical directions of bridge,and the correlation regression models were built between temperature and the position coordinates of main girder in the longitudinal and vertical directions;then the alarming indices of coordinate residuals were conducted,and the mean-value control chart was applied to making statistical pattern identification for abnormal changes of girder dynamic coordinates;and finally,the structural damage alarming method of main girder was established.Analysis results show that temperature has remarkable correlation with position coordinates in the longitudinal and vertical directions of bridge,and has weak correlation with the transverse coordinates.The 3%abnormal change of the longitudinal coordinates and 5%abnormal change of the vertical ones caused by structural damage are respectively identified by the mean-value control chart method based on GPS dynamic monitoring data and hence the structural abnormalities state identification and damage alarming for main girder of long-span suspension bridge can be realized in multiple directions.Structure damage identification and alarming of long-span bridge were conducted with three-dimensional dynamic displacement data collected by GPS subsystem of health monitoring system on Runyang Suspension Bridge.First,the effects of temperature on the main girder spatial position coordinates were analyzed from the transverse,longitudinal and vertical directions of bridge,and the correlation regression models were built between temperature and the position coordinates of main girder in the longitudinal and vertical directions;then the alarming indices of coordinate residuals were conducted,and the mean-value control chart was applied to making statistical pattern identification for abnormal changes of girder dynamic coordinates;and finally,the structural damage alarming method of main girder was established.Analysis results show that temperature has remarkable correlation with position coordinates in the longitudinal and vertical directions of bridge,and has weak correlation with the transverse coordinates.The 3%abnormal change of the longitudinal coordinates and 5%abnormal change of the vertical ones caused by structural damage are respectively identified by the mean-value control chart method based on GPS dynamic monitoring data and hence the structural abnormalities state identification and damage alarming for main girder of long-span suspension bridge can be realized in multiple directions.

关 键 词：long-span suspension bridge damage alarming mean-value control chart GPS displacement temperature correlation 

分 类 号：U446[建筑科学—桥梁与隧道工程]