基于多点平滑的影响线提取方法研究及桥梁状态评估  

Research on the Influence Line Extraction Method Based on Multi-point Smoothing and Bridge Condition Assessment

作　　者：刘张浩 赵毅 禹鹏 易航宇 陈熠昕 LIU Zhanghao;ZHAO Yi;YU Peng;YI Hangyu;CHEN Yixin(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;Chongqing Wukang Technology Co.,Ltd.,Chongqing 404100;Chongqing Municipal Facilities Operation Guarantee Center,Chongqing 401120;Chongqing Expressway Network Management Co.,Ltd.,Chongqing 401121)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆物康科技有限公司,重庆404100 [3]重庆市市政设施运行保障中心,重庆401120 [4]重庆高速公路路网管理有限公司,重庆401121

出　　处：《公路交通技术》2022年第6期83-91,共9页Technology of Highway and Transport

基　　金：国家重点研发计划项目(2020YFF0217801);重庆市建设科技计划项目(城科字2021第5-10);重庆英才计划“包干制”项目(cstc2021ycjh-bgzxm0210)。

摘　　要：基于实测影响线的桥梁状态评估具有不中断交通、测试方便等优点,是未来中小跨径桥梁承载能力评估的重要方式,目前在实际桥梁上应用的案例较少。为此,先开展基于多点平滑的影响线提取方法研究;后结合挠度数据和应变数据,提取桥梁挠度影响线和应变影响线;在此基础上,再开展基于峰值的桥梁状态评估和基于设计活载响应对比的桥梁状态评估。结果表明:1)建立的影响线方法可用于实际桥梁的挠度和应变提取影响线,尤其是测试结果出现很多芒刺时,采用五点三次平滑法既能保证数据准确,又能平滑数据;2)评估结果显示,挠度校验系数在0.29~0.46之间,应变校验系数在0.10~0.37之间,表明测试桥跨的刚度和强度在现有状态下满足通行设计活载的要求。The bridge condition assessment based on the measured impact lines has the advantages of no traffic interruption and convenient testing,which is an important way to assess the bearing capacity of small and medium span bridges in the future.There are few cases of application on actual bridges.Therefore,this study is first carried out on the influence line extraction method based on multi-point smoothing;Then,in combination with the deflection data and strain data,the deflection influence line and strain influence line of the bridge are extracted.On this basis,the bridge state assessment based on the comparison of peak value and design live load response is carried out.The results show that the influence line extraction method established in this paper can be used to extract influence lines for deflection and strain of bridges,especially when the test results show many awnings,and the five-point three-time smoothing method can be used to smooth the data while ensuring the accuracy of the data.The evaluation results show that the deflection calibration coefficients range from 0.29 to 0.46 and the strain calibration coefficients range from 0.10 to 0.37,indicating that the stiffness and strength of the tested bridge spans reach the requirements of the design live load for passing in the existing condition.

关 键 词：数据平滑、应变影响线 挠度影响线 状态评估 

分 类 号：U446[建筑科学—桥梁与隧道工程]