超长大跨度结构施工阶段温度效应研究  

Study on Temperature Effect of Super Length and Large Span Structure During Construction

作　　者：范重[1] 李夏[1,2] 刘家明[1] 张宇[1] 邢超[1] 刘学林[1] 

机构地区：[1]中国建筑设计研究院,北京100044 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《施工技术》2016年第14期9-16,共8页Construction Technology

摘　　要：结合某大型航站楼工程,对超长大跨度结构在施工阶段的温度效应问题进行较为深入的探讨。在确定超长大跨度结构施工阶段正、负温差时,考虑太阳辐射引起钢结构温升以及混凝土收缩当量温降的影响。根据超长大跨度结构的施工进度计划,得到混凝土结构各楼层正、负温差的变化规律,考察施工起始时间对结构正、负温差的影响。分别对施工期间混凝土楼板、框架柱以及大跨度钢屋盖的内力与变形特点进行分析,考察温度作用沿楼层高度的变化情况。通过对各施工步序进行精细模拟,较为真实地反映了结构温度效应随施工进度的变化情况,为超长大跨度结构设计与施工验算提供科学依据。This paper probes the temperature effect of super length and large span structure during construction period,based on a large airport terminal project. The temperature rising of steel caused by solar radiation and the equivalent temperature dropping resulted from concrete shrinkage are considered when determining the positive and negative temperature variation of the super length and large span structure. According to the construction schedule of large span structure,this paper obtains the change rules of the positive and negative temperature in each concrete structure floor,by which the influence of the construction starting time on positive and negative temperature variation can be reviewed. Based on the analysis of internal force and deformation of concrete floor,frame columns and large span steel roof during the construction period,this paper reviews the variation of temperature effect as the floor height increases. Change rules of structural temperature effect,along with the construction schedule,can be factually reflected by simulating the construction steps,which can provide scientific basis for design and construction checking of large span structure.

关 键 词：钢结构 超长混凝土结构 混凝土收缩 温度效应 施工技术 

分 类 号：TU393.3[建筑科学—结构工程]