Analytical solution of two-dimensional temperature field of flat steel box girder under sunlight

被引：0
|
作者：
Li S. [1 ]
Zhang Y. [1 ]
Li C. [1 ]
Li W. [2 ]
机构：
[1] Changsha University of Science & Technology, Changsha
[2] Guangdong Metallurgical and Design Institute Co., Ltd., Guangzhou
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2023年 / 56卷 / 11期
关键词：
analytical solution; bridge engineering; flat steel box girder; temperature field; unsteady heat conduction;
D O I：
10.15951/j.tmgcxb.22070722
中图分类号：
学科分类号：
摘要：
In view of the fact that the current research methods for temperature field of flat steel box girder under solar radiation has been limited to numerical simulation and long-term field tests and the analytical method has been unavailable, the temperature field model of the top plate and web of flat steel box girder with paving layer is established based on the principle of heat conduction, and the analytical solution of temperature field of the top plate and the web are obtained by integral transformation method. With the single tower cable-stayed bridge taken as an example, the measured values of the top plate temperature field are compared to the calculated values of the analytical solution with the solar radiation intensity calculated by the measurement method, Hottle method and power exponent method respectively, and furthermore the analytical solution with solar radiation intensity calculated by the measurement method is employed to study the influences of bridge deck crash barrier and steel box girder section form on the temperature distribution of the top plate. The results show that with the solar radiation intensity calculated by the measurement method, the analytical solution agrees best with the measured values, because the maximum deviation between the calculated value and the measured value is no more than 3℃ and the maximum absolute error between the two averages is no more than 1. 3℃. When comparing the power exponential method to the Hottle method, the calculation accuracy of the analytical solution is higher if the solar radiation intensity is calculated by the power exponential method. Under sunlight, the uneven temperature distribution of the top plate of the flat steel box girder caused by the shelter of the bridge deck crash parapet mainly occurs at the top plate position near this parapet, and the degree of temperature unevenness caused is positively correlated with the intensity of solar radiation. The difference in temperature distribution between the top plate of PK section steel box girder and closed section steel box girder is reflected in whether there is an opening position, which shall be produced by the different ambient temperatures inside and outside the box due to the insulation effect of the closed box chamber of the steel box girder. © 2023 Editorial Office of China Civil Engineering Journal. All rights reserved.
引用
收藏
页码：64 / 77
页数：13
相关论文
共 32 条
  • [1] Liu Yongjian, Liu Jiang, Zhang Ning, Review on solar thermal actions of bridge structures, China Civil Engineering Journal, 52, 5, pp. 59-78, (2019)
  • [2] JTG D60—2015 General specifications for design of highway bridges and culverts, (2015)
  • [3] Xu Xiang, Huang Qiao, Ren Yuan, Et al., Thermal field analysis for large span steel cable-stayed bridges using in-situ measurements, Journal of Harbin Institute of Technology, 51, 9, pp. 14-21, (2019)
  • [4] Chen Yifei, Sun Zongguang, Shao Yuan, Analysis on temperature difference characteristic of steel box girder cross-section of cable-stayed bridge over north sea based on long-term monitoring, Journal of Highway and Transportation Research and Development, 35, 5, pp. 65-72, (2018)
  • [5] Liu Yang, Zhang Haiping, Deng Yang, Et al., Temperature field characteristic research of steel box girder for suspension bridge based on measured data, China Journal of Highway and Transport, 30, 3, pp. 56-64, (2017)
  • [6] Deng Y, Li A Q, Liu Y, Et al., Investigation of temperature actions on flat steel box girders of long-span bridges with temperature monitoring data, Advances in Structural Engineering, 21, 14, pp. 2099-2113, (2018)
  • [7] Tao T Y, Wang H, Zhu Q X, Et al., Long-term temperature field of steel-box girder of a long-span bridge: Measurement and simulation [J], Engineering Structures, 236, (2021)
  • [8] Wang Z W, Zhang W M, Zhang Y F, Et al., Temperature prediction of flat steel box girders of long-span bridges utilizing in situ environmental parameters and machine learning[J], Journal of Bridge Engineering, 27, 3, (2022)
  • [9] Zhang Yuping, Yang Ning, Li Chuanxi, Research on temperature field of steel box girder without pavement caused by the solar radiations, Engineering Mechanics, 28, 6, pp. 156-162, (2011)
  • [10] Zhu Fengqi, Bridge performance evaluation based on monitoring data and multiscale finite element model analysis, (2019)
1234