基于复核计算指导的现有桥梁健康监测及其应用  

Structural Health Monitoring and Application of Existing Bridges under the Guidance of Priori Checking Calculation

作　　者：侯忠明[1] 乔晓军 乔捷 张天申[1] 郑婷婷[1] 

机构地区：[1]清华大学结构工程与振动教育部重点实验室,北京100084 [2]北京市城市道路养护管理中心,100069

出　　处：《特种结构》2015年第1期89-96,共8页Special Structures

基　　金：中国博士后科学基金资助项目(2014M560088)

摘　　要：经过20多年的不间断服役,北京市天宁寺二环主路桥的部分结构已出现一些病害,部分支座处的梁体与支座发生较大的相对偏移,甚至造成个别限位螺栓剪断。本文以加固后的天宁寺桥的结构健康监测为例,对基于复核计算指导的既有桥梁的健康监测方法及其应用进行研究,得到确定监测对象和监测指标的方法。研究结果表明:在实施监测项目之前,预先通过理论和数值分析对结构的整体状态、局部状态的静力和动力特性指标进行分析,找到影响监测项目的关键参数,进而选取合理的监测参数,可达到全面获取结构关键状态指标的目的。同时也可对监测过程中的参数变化规律、可能出现的测试结果以及相应的监测方案调整进行有针对性的预测,从而提高监测系统运行的效果和可靠性。After continuous service of more than 20 years,some structural diseases have been increasingly appearing in Tianningsi Overpass Bridge,in which part of the bearing＇s displacements have exceeded the limit value,and even led to destroy of the stop bolts.Taking the strengthened Tianningsi Overpass Bridge as an example,in this paper the application of structural health monitoring to existing bridges based on priori diagnosis and evaluation are studied,where the principle of monitoring targets and indices are established.The studies show that before the implement of the monitoring project,it is necessary to conduct priori diagnosis and evaluation to the structural status in advance.The static and dynamic characteristics of the global and local statuses can then be obtained by the theoretical and numerical methods,as well as the key parameters that influence the monitoring,and then the reasonable monitoring parameters can be determined to achieve the goal of comprehensive health monitoring.Furthermore,the possible changing law,measuring results and corresponding treatment countermeasures in the monitoring process are also under control,consequently the monitoring effect and reliability can also be greatly improved.

关 键 词：结构健康监测 先验结构诊断 有限元分析 监测参数设置 

分 类 号：U446[建筑科学—桥梁与隧道工程]