Abstract：On the basis of theoretical analysis and measurement on site, the temperature gradients and its variation on concrete box girder bridges resulting from ambient temperature, solar radiation, and structural temperature fields were discussed. With the help of the heat transfer theory and finite element method (FEM), the heat flux of the surface of concrete box girder was carried out, and all the heat fluxes were described as the convection. The results were compared with that from field measurements, and a good correlation was found. It was revealed that the methods, the parameters, the boundary condition used in this paper were reasonable. Last, some conclusions were obtained, which could provide the basis for box girder design under solar radiation.
出版日期: 2009-12-05
引用本文:
. Temperature variation of concrete box girder
bridge[J]. Front. Struct. Civ. Eng., 2009, 3(4): 407-413.
Jian WANG, Zhi FANG, . Temperature variation of concrete box girder
bridge. Front. Struct. Civ. Eng., 2009, 3(4): 407-413.
Liu Xingfa. Analysis of Thermal Stress For Concrete Structure. Beijing: China CommunicationsPress, 1991 (in Chinese)
Kehlbeck F. Effectof Solar Radiation on Bridge Structure. Liu Xingfa, etc. transl. Beijing: Chinese Railway Press, 1981 (in Chinese)
Wang Jian. Prediction of thermal effects, shrinkage and creep effects, and prestresslosses in long-span PC box girder bridge. Changsha: Hunan University, 2007 (in Chinese)
Potgieter I C, Gamble W L. Nonlinear temperature distributionsin bridges at different loactions in the United States. PCI Journal, 1989, 34(4): 81―103
Dilger W H, Ghahi A, Cheung M S, Beauchamp J C. Field measurements of Muskwa River Bridge. Journal of the Structural Division, Proceedings of the ASCE, 1981,107(11): 2147―2161
Ye Jianshu, Jia Lin, Qian Peishu. Field measurementsand research of temperature variations in concrete box girder. Journal of Southeast University, 2002, 32(5): 788―793 (in Chinese)
