Experiment on Temperature Distribution of Rectangular CFST Cross Section in Severe Cold Areas(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2018年05期
- Page:
- 170-178
- Research Field:
- Publishing date:
Info
- Title:
- Experiment on Temperature Distribution of Rectangular CFST Cross Section in Severe Cold Areas
- Author(s):
- TIAN Zhi-juan; LIU Yong-jian; MA Yin-ping; LIU Jiang
- School of Highway, Chang’an University
- Keywords:
- bridge engineering; severe cold area; rectangular CFST; temperature field; solar radiation
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to research the thermal load of steel concrete composite structures in severe cold areas, Xining was taken as a representative city in severe areas and the field test of temperature distribution of horizontal arranged rectangular concrete filled steel tube (CFST) member with longitudinal stiffeners was performed, the temperature field of CFST under solar radiation was researched. The three dimensional temperature filed of CFST member was simplified to two dimensional temperature filed, subsequently the thermal analysis model was built based on ABAQUS software, the finite element simulating method for temperature filed of CFST member was presented considering the parameters of solar radiation, wind speed and atmosphere temperature and etc. The results show that the calculating results of steel tube and infilled concrete coincide well with the test data. The temperature field of rectangular CFST member under solar radiation is unsymmetrical, and there exists obvious thermal gradient. The temperature of steel tube is affected by the atmosphere temperature directly, thus causing the temperature variation of steel tube lag behind the atmosphere temperature, and the temperature extreme value is much higher than atmosphere temperature. The temperature of infilled concrete is affected by atmosphere temperature indirectly, which has a higher level of variation lag and the temperature extreme value is lower than that of the steel tube. The temperature of rectangular CFST member can also be affected by the longitudinal stiffeners in the steel tube, the stiffeners increase the contact area between steel tube and infilled concrete, relieve the temperature variation lag of infilled concrete and decrease the gradient temperature difference on the cross section of CFST members.
Last Update: 2018-09-03