混凝土结构温度作用研究进展

Advances in Research of Temperature Action in Concrete Structures

在当前日益增多的大跨、高耸、薄壁等混凝土结构中,温度作用常常会使结构产生较大的应力,温度应力会引起结构开裂,从而影响结构的正常使用,甚至会导致结构破坏。文章首先介绍了温度作用的特点及温度荷载的分类、影响因素和温度场的3种计算方法,然后给出了一些典型结构(如箱梁)温度分布的简化计算公式及各国规范中有关温度作用的规定,最后分析了温度作用对混凝土结构的影响,并对混凝土结构温度作用的研究方向进行了展望。

With the increasing applications of large span, high - rising or thin - walled concrete structures at present,temperature action often calls reletively high stresses. Temperature stress can results in cracking of structures, adverse effect on normal workability and even failure of structures. Properties of temperature action, classification and affecting factors of temperature loads as well as three methods of calculating temperature field were introduced in this paper. Then predigested calculating formulas of temperature distribution of typical structures （such as box girders） and design methods of temperature loads mentioned in codes of other countries were presented subsequently, and finally effects of temperature action on concrete structures were analyzed, then the research dirction was pointed out.