大比例连续刚构桥模型试验及损伤评估
|
摘要
桥梁结构在其服役过程中,由于荷载作用和各种环境作用等影响,不可避免的会产生累积损伤和功能退化,甚至会导致突发事故。因此,对桥梁的工作状态进行健康监测,避免事故发生,已成为当前研究的一个热点。结合一个3跨18m长的大型连续刚构桥模型试验,采用曲率模态法,对不同荷载工况下桥梁结构的损伤情况进行研究,分析其识别能力。结果表明,通过桥梁曲率模态的变化可以判断其损伤情况,从而监测桥梁的工作状态。
During the service life of a bridge, it is impossible to avoid damage accumulation and function degeneration or even an accident due to traffic load, environmental corrosion. Hence, the health monitoring of bridges have been received wide concern to prevent the sudden fatal accidents. This paper presents the experiment and the damage evaluation on a large-scale continuous rigid frame concrete bridge with 3 spans and a total length of 18m. Ten different load cases were tested to simulate different levels of overload and curvature mode method was adopted to detect the damage after the load cases. By monitoring the changes of curvature modes, the damage detection shows good performance to give the working status and the damage position of the bridge. It can be concluded that this method could be used in real structural health monitoring.
During the service life of a bridge, it is impossible to avoid damage accumulation and function degeneration or even an accident due to traffic load, environmental corrosion. Hence, the health monitoring of bridges have been received wide concern to prevent the sudden fatal accidents. This paper presents the experiment and the damage evaluation on a large-scale continuous rigid frame concrete bridge with 3 spans and a total length of 18m. Ten different load cases were tested to simulate different levels of overload and curvature mode method was adopted to detect the damage after the load cases. By monitoring the changes of curvature modes, the damage detection shows good performance to give the working status and the damage position of the bridge. It can be concluded that this method could be used in real structural health monitoring.
引文
[1]欧进萍.重大工程灾变行为与健康监测的几个关键科学问题[C].北京:重大工程灾变行为与健康监测学术研讨会,2001.Ou Jinping.Several key problems in the disaster behavior and health monitoring of important project[C].Beijing:Proc.Symposium on Disaster Behavior and Health Monitoring of Important Project,2001.(in Chinese)
[2]张汎,崔玉萍.旧桥的预测评估与维修加固[C].北京:北京国际桥梁结构评估研讨会,2004.1~5.Zhang Fan,Cui Yuping.Predicted assessment and maintenance of old bridges[C].Beijing:Proc.Beijing International Symposium on Bridge Structure Assessment,2004.1~5.(in Chinese)
[3]Jiang Jianjing,Lu Xinzheng,Guo Jingjun.Study for real-time monitoring of large-span bridge using GPS[A].Tai'an,China:Proc.3rd International Symposium on Safety Science and Technology(2002ISSST)[C].Beijing:Science Press,2002.308~312.
[4]秦权.桥梁结构的健康监测[J].中国公路学报,2000,13(2):37~42.Qin Quan.Health monitoring of long-span bridges[J].China Journal of Highway and Transport,2000,13(2):37~42.(in Chinese)
[5]裴强,郭讯,张敏政.桥梁健康监测及诊断研究综述[J].地震工程与工程振动,2003,23(2):61~67.Pei Qiang,Guo Xun,Zhang Minzheng.A review of health monitoring and damage detection of bridge structures[J].Earthquake Engineering and Engineering Vibration,2003,23(2):61~67.(in Chinese)
[6]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断综述[J].地震工程与工程振动,2002,22(3):82~90.Li Hongnan,Li Dongsheng.Safety assessment,health monitoring and damage diagnosis for structures in civil engineering[J].Earthquake Engineering and Engineering Vibration,2002,22(3):82~90.(in Chinese)
[7]李德葆,陆秋海.实验模态分析及其应用[M].北京:科学出版社,2001.Li Debao,Lu Qiuhai.Experimental modal analyses and application[M].Beijing:Science Press,2001.(in Chinese)
[8]李德葆,陆秋海,秦权.承弯结构的曲率模态分析[J].清华大学学报(自然科学版),2002,42(2):224~227.Li Debao,Lu Qiuhai,Qin Quan.Curvature modal analysis for bending structures[J].Journal of Tsinghua University(Science and Technology),2002,42(2):224~227.(in Chinese)
[9]Pandey A K,Biswas M,Samman M M.Damage detection from changes in curvature mode shapes[J].Journal of Sound and Vibration,1991,145(2):321~332.
[10]刘效尧,蔡键,刘晖.桥梁损伤诊断[M].北京:人民交通出版社,2002.Liu Xiaorao,Cai Jian,Liu Hui.Damage diagnosis for bridges[M].Beijing:China Communication Press,2002.(in Chinese)
[2]张汎,崔玉萍.旧桥的预测评估与维修加固[C].北京:北京国际桥梁结构评估研讨会,2004.1~5.Zhang Fan,Cui Yuping.Predicted assessment and maintenance of old bridges[C].Beijing:Proc.Beijing International Symposium on Bridge Structure Assessment,2004.1~5.(in Chinese)
[3]Jiang Jianjing,Lu Xinzheng,Guo Jingjun.Study for real-time monitoring of large-span bridge using GPS[A].Tai'an,China:Proc.3rd International Symposium on Safety Science and Technology(2002ISSST)[C].Beijing:Science Press,2002.308~312.
[4]秦权.桥梁结构的健康监测[J].中国公路学报,2000,13(2):37~42.Qin Quan.Health monitoring of long-span bridges[J].China Journal of Highway and Transport,2000,13(2):37~42.(in Chinese)
[5]裴强,郭讯,张敏政.桥梁健康监测及诊断研究综述[J].地震工程与工程振动,2003,23(2):61~67.Pei Qiang,Guo Xun,Zhang Minzheng.A review of health monitoring and damage detection of bridge structures[J].Earthquake Engineering and Engineering Vibration,2003,23(2):61~67.(in Chinese)
[6]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断综述[J].地震工程与工程振动,2002,22(3):82~90.Li Hongnan,Li Dongsheng.Safety assessment,health monitoring and damage diagnosis for structures in civil engineering[J].Earthquake Engineering and Engineering Vibration,2002,22(3):82~90.(in Chinese)
[7]李德葆,陆秋海.实验模态分析及其应用[M].北京:科学出版社,2001.Li Debao,Lu Qiuhai.Experimental modal analyses and application[M].Beijing:Science Press,2001.(in Chinese)
[8]李德葆,陆秋海,秦权.承弯结构的曲率模态分析[J].清华大学学报(自然科学版),2002,42(2):224~227.Li Debao,Lu Qiuhai,Qin Quan.Curvature modal analysis for bending structures[J].Journal of Tsinghua University(Science and Technology),2002,42(2):224~227.(in Chinese)
[9]Pandey A K,Biswas M,Samman M M.Damage detection from changes in curvature mode shapes[J].Journal of Sound and Vibration,1991,145(2):321~332.
[10]刘效尧,蔡键,刘晖.桥梁损伤诊断[M].北京:人民交通出版社,2002.Liu Xiaorao,Cai Jian,Liu Hui.Damage diagnosis for bridges[M].Beijing:China Communication Press,2002.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心