1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing Jiangsu 210096, China;
2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China;
3. Jiangsu Transportation Institute, Nanjing Jiangsu 210017, China
Long-term Temperature Monitoring and Statistical Analysis on the Flat Steel-box Girder of Sutong Bridge
WANG Gao-xin1, DING You-liang1, WANG Xiao-jing2, YAN Xin2, ZHANG Yu-feng3
1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing Jiangsu 210096, China;
2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China;
3. Jiangsu Transportation Institute, Nanjing Jiangsu 210017, China
摘要Using the flat steel-box girder of China's Sutong Cable-stayed Bridge as a research object, its temperature field is long-term monitored and analyzed based on bridge's structural health monitoring system. The temperature distribution characteristics of the girder are investigated using the temperature data, and the transverse and vertical thermal differences are analyzed in detail. Using statistical methods, the corresponding probability distribution models of the temperatures and the temperature differences of the flat steel-box girder are established, and the standard values of the temperature and temperature differences within a certain return period are determined. The analysis results reveal that (1) there exist dominant vertical temperature differences between the top and bottom plates, with definite transverse temperature differences in the top plate and negligible transverse temperature differences in the bottom plate of the flat steel-box girder; (2) the temperature probability density distributions of the flat steel-box girder can be well described by the weighted sum of two normal distributions, and its temperature difference probability density distributions can be well described by the weighted sum of two Weibull distributions.
Abstract：Using the flat steel-box girder of China's Sutong Cable-stayed Bridge as a research object, its temperature field is long-term monitored and analyzed based on bridge's structural health monitoring system. The temperature distribution characteristics of the girder are investigated using the temperature data, and the transverse and vertical thermal differences are analyzed in detail. Using statistical methods, the corresponding probability distribution models of the temperatures and the temperature differences of the flat steel-box girder are established, and the standard values of the temperature and temperature differences within a certain return period are determined. The analysis results reveal that (1) there exist dominant vertical temperature differences between the top and bottom plates, with definite transverse temperature differences in the top plate and negligible transverse temperature differences in the bottom plate of the flat steel-box girder; (2) the temperature probability density distributions of the flat steel-box girder can be well described by the weighted sum of two normal distributions, and its temperature difference probability density distributions can be well described by the weighted sum of two Weibull distributions.
基金资助:Supported by the National Basic Research Program of China (973 Program)(No.2015CB060000), the Key Program of Ministry of Transport of China (No.2013319223120)t, the Key Program of National Natural Science Foundation (No.51438002), the Program of "Six Major Talent Summit" Foundation (No.1105000268), and the Fundamental Research Funds for the Central Universities and the Innovation Plan Program for Ordinary University Graduates of Jiangsu Province in 2014 (No.KYLX_0156)
通讯作者:
WANG Gao-xin, civilwanggx@163.com
E-mail: civilwanggx@163.com
引用本文:
王高新, 丁幼亮, 王晓晶, 闫昕, 张宇峰. 苏通大桥扁平钢箱梁温度场长期监测与统计分析[J]. Journal of Highway and Transportation Research and Development, 2014, 8(4): 63-68.
WANG Gao-xin, DING You-liang, WANG Xiao-jing, YAN Xin, ZHANG Yu-feng. Long-term Temperature Monitoring and Statistical Analysis on the Flat Steel-box Girder of Sutong Bridge. Journal of Highway and Transportation Research and Development, 2014, 8(4): 63-68.
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2014, Vol. 8 
