钢桥桥面铺装层的温度场分布特征  

Characteristics of Temperature Field Distribution of Steel Bridge Deck Pavement

作　　者：逯彦秋[1] 陈宜言 孙占琦 张肖宁[3] 

机构地区：[1]清华大学土木水利学院,北京100084 [2]深圳市市政设计研究院有限公司,广东深圳518029 [3]华南理工大学土木与交通学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2009年第8期116-121,126,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：交通部西部课题科研基金资助项目(2001-318-223-41)

摘　　要：针对钢桥桥面铺装层早期破坏这一世界性难题,以傅立叶传热定律为理论基础,根据气象部门提供的气象资料,运用有限元手段,对钢桥桥面铺装层温度场的温度分布特征进行了系统研究,分析了钢桥桥面铺装层的温度分布规律.结果表明:在相同气候条件下,钢桥桥面铺装层的最高温度远高于道路,并且钢桥桥面铺装层的高温作用时间长,温度波动大,正负梯度转化快,不同深度处最高温度的温度滞后现象不明显;钢桥桥面铺装层内的温度场变化较路面更为剧烈,温度条件更为苛刻.因此,在钢桥桥面铺装设计中,铺装层的高温问题应当引起足够重视.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 （ 1 ） in the same climatic condi- tion, the highest temperature of steel bridge deck pavement is higher than that of the road ; （2） with the prolonging of the high-temperature duration, the temperature fluctuation becomes more obvious and the temperature gradient changes more greatly; （3） the lag of temperature at the highest temperature point varies slightly with the depth; and （4） 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.

关 键 词：钢桥 桥面铺装层 温度场 太阳辐射 热流密度 

分 类 号：TU663[建筑科学—建筑技术科学]