斜拉桥结构变形监测数据温度时滞效应消除方法  

Elimination Method of Temperature Lag Effect in Deformation Monitoring Data of Cable‑Stayed Bridge Structures

作　　者：刘洪双 翟文强 曾国良 LIU Hongshuang;ZHAI Wenqiang;ZENG Guoliang(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan,Hubei 430063,China;CCCC Second Highway Engineering Co.,Ltd.,Xi’an,Shaanxi 710076,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of City Engineering and Architecture,Beijing 100044,China;School of Civil and Architecture,Hunan University of Arts and Sciences,Changde,Hunan 415000,China)

机构地区：[1]武汉理工大学交通与物流工程学院,湖北武汉430063 [2]中交第二公路工程局有限公司,陕西西安710076 [3]北京建筑大学北京未来城市设计高精尖创新中心,北京市100044 [4]湖南文理学院土木建筑工程学院,湖南常德415000

出　　处：《中外公路》2024年第6期148-158,共11页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(编号:52068024)。

摘　　要：桥梁结构的变形监测数据存在温度时滞效应,消除温度时滞效应对桥梁结构健康监测具有重要意义。该文基于桥梁结构变形与温度之间的线性相关性,应用拟合优度检验,提出了一种时域平移消除方法。在此基础上,以某斜拉桥长期同步监测的索塔倾斜、梁端位移、主梁挠度和桥梁结构温度数据为例,采用该方法对变形监测数据的温度时滞效应进行消除,并与傅里叶级数法进行了比较。结果表明:该桥的索塔倾斜、梁端位移和主梁挠度与结构温度之间存在明显的滞后现象,结构变形-温度相关性散点图中存在较为明显的滞回环。采用该方法消除温度的时滞效应后,结构变形监测数据与温度数据之间的拟合优度值可达到0.99,相比于傅里叶级数法,该方法在消除结构变形监测数据温度时滞效应方面效果更佳。There is a temperature lag effect in the deformation monitoring data of the bridge structure.Eliminating the temperature lag effect is of great significance in the health monitoring of the bridge structure.Based on the linear correlation between the deformation of the bridge structure and the temperature,this paper applied the goodness of fit test and proposed a time-domain translation elimination method.On this basis,by taking the long-term synchronous monitoring of the tower inclination,beam end displacement,main girder deflection,and temperature data of a cable-stayed bridge as an example,this method was used to eliminate the temperature lag effect in the deformation monitoring data and compared with the existing Fourier series method.The research results show that there are obvious hysteresis phenomena among the tower inclination,beam end displacement,main beam deflection,and the temperature of the bridge structure,and there is a relatively obvious hysteresis loop in the scatter plot of structural deformation and temperature correlation.After using this method to eliminate the temperature lag effect,the goodness of fit between the structural deformation monitoring data and the temperature data can reach 0.99.Compared with the Fourier series method,this method has a better effect in eliminating the temperature lag effect in the structural deformation monitoring data.

关 键 词：斜拉桥 结构变形 时滞效应 时域 温度 拟合优度 梁端位移 挠度 

分 类 号：U441[建筑科学—桥梁与隧道工程]