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首页> 外文期刊>Mathematical Problems in Engineering >Assessing Static Performance of the Dashengguan Yangtze Bridge by Monitoring the Correlation between Temperature Field and Its Static Strains
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Assessing Static Performance of the Dashengguan Yangtze Bridge by Monitoring the Correlation between Temperature Field and Its Static Strains

机译：监测温度场与静应变相关性评估大胜关长江大桥静力性能。

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摘要

Taking advantage of the structural health monitoring system installed on the steel truss arch girder of Dashengguan Yangtze Bridge, the temperature field data and static strain data are collected and analyzed for the static performance assessment of the bridge. Through analysis, it is found that the static strain changes are mainly caused by temperature field (temperature and temperature difference) and train. After the train-induced static strains are removed, the correlation between the remaining static strains and the temperature field shows apparent linear characteristics, which can be mathematically modeled for the description of static performance. Therefore, multivariate linear regression function combined with principal component analysis is introduced to mathematically model the correlation. Furthermore, the residual static strains of mathematical model are adopted as assessment indicator and three kinds of degradation regulations of static performance are obtained after simulation of the residual static strains. Finally, it is concluded that the static performance of Dashengguan Yangtze Bridge was in a good condition during that period.
机译：利用大胜关长江大桥钢桁拱梁安装的结构健康监测系统，收集温度场数据和静应变数据，进行分析，以评估桥梁的静力性能。通过分析发现，静应变的变化主要是由温度场（温度和温差）和列车引起的。消除列车引起的静态应变后，剩余的静态应变与温度场之间的相关性将显示明显的线性特征，可以对其进行数学建模以描述静态性能。因此，引入了多元线性回归函数和主成分分析相结合的数学模型。此外，采用数学模型的残余静应变作为评估指标，对残余静应变进行仿真，得出三种静态性能退化规律。最后得出结论，在此期间大胜关长江大桥的静态性能处于良好状态。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第4期|946907.1-946907.12|共12页
  • 作者

    Wang Gao-Xin; Ding You-Liang; Sun Peng; Wu Lai-Li; Yue Qing;

  • 作者单位

    Southeast Univ, Dept Civil Engn, Nanjing 210096, Jiangsu, Peoples R China.;

    Southeast Univ, Dept Civil Engn, Nanjing 210096, Jiangsu, Peoples R China.;

    Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA.;

    China Railway Major Bridge Nanjing Bridge & Tunne, Nanjing 210032, Jiangsu, Peoples R China.;

    China Railway Major Bridge Nanjing Bridge & Tunne, Nanjing 210032, Jiangsu, Peoples R China.;

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