关键词: 钢桥, 桥面铺装层, 温度场, 太阳辐射, 热流密度

Abstract:

In order to avoid the early damage of steel bridge deck pavement which is a worldwide difficult problem, the characteristics and rules of temperature distribution of steel bridge deck pavement are investigated according to the meteorological data provided by the meteorological department. In the investigation, the Fourier heat-transfer law is adopted and the finite element method is employed. The results indicate that  in the same climatic condi- tion, the highest temperature of steel bridge deck pavement is higher than that of the road ;  with the prolonging of the high-temperature duration, the temperature fluctuation becomes more obvious and the temperature gradient changes more greatly;  the lag of temperature at the highest temperature point varies slightly with the depth; and  as compared with the road, the steel bridge deck pavement is of stronger temperature variation and de- mands severer temperature conditions. It is thus concluded that, during the design of steel bridge deck pavement, the high temperature of deck pavement deserves more attention.

Key words: steel bridge, deck pavement, temperature field, solar radiation, heat flux density