基于高阶矩法的梁-轨系统温度作用代表值
发布时间：2019-01-10 12:37
【摘要】：提出了一种基于高阶矩法的结构温度统计方法,可避免传统方法拟合曲线求分布的不确定性,计算效率、精度高.基于我国华东一高铁桥梁长期监测数据,将箱梁和轨道作为整体,计算了其竖、横向温度和温差代表值,分析了温度云图和温差分布规律,研究了轨道结构对箱梁表面温度的遮盖效应.研究表明:结构年温度样本属中变异,分布规律平稳;高温标准值分别为35.4℃,38.15℃,竖向最大高温梯度分别为10.33℃,12.93℃;混凝土竖向有效导热长度约为60 cm,轨道遮盖可降低箱梁表面温度4.4℃.
[Abstract]:A structure temperature statistics method based on high-order moment method is proposed, which can avoid the uncertainty of the distribution of the fitting curve by the traditional method, and has the advantages of high efficiency and high precision. Based on the long-term monitoring data of a high-speed railway bridge in East China, the vertical, transverse temperature and temperature difference representative values of box girder and track are calculated, and the temperature cloud map and temperature difference distribution law are analyzed. The covering effect of track structure on surface temperature of box girder is studied. The results show that the annual structural temperature samples belong to medium variation and steady distribution, the standard values of high temperature are 35.4 鈩，
本文编号：2406316
[Abstract]:A structure temperature statistics method based on high-order moment method is proposed, which can avoid the uncertainty of the distribution of the fitting curve by the traditional method, and has the advantages of high efficiency and high precision. Based on the long-term monitoring data of a high-speed railway bridge in East China, the vertical, transverse temperature and temperature difference representative values of box girder and track are calculated, and the temperature cloud map and temperature difference distribution law are analyzed. The covering effect of track structure on surface temperature of box girder is studied. The results show that the annual structural temperature samples belong to medium variation and steady distribution, the standard values of high temperature are 35.4 鈩，
本文编号：2406316
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