2014年7月下第43卷第14期
DOI:10.7672/sgjs2014140011
工技
术
CONSTRUCTIONTECHNOLOGY
超高层建筑巨型钢管混凝土柱性能研究
范重"，仕帅"2,赵长军
（1.中国建筑设计研究院，北京100044；2.北京建筑大学土木与交通工程学院，北京100044）
【摘要】随着我国超高层建筑的迅速发展，巨型钢管混凝土柱逐渐得到应用。对于巨型方钢管混凝土柱，钢板的宽厚比是主要控制因素，可以采用多腔型或加劲助方式形成组合截面减小对板厚的需求。介绍了巨型方钢管混凝土柱正截面与斜截面承载力的计算方法以及巨型方钢管混凝土柱试验研究情况，给出了施工阶段验算的实例。对不同技术规程中钢管混凝土柱承载力算法进行了比较，其计算结果存在较大差异。对巨型圆钢管混凝土柱轴向受压承载力与径厚比、混凝土强度等级的关系进行了深人研究，详细分析了轴压比对构件延性的影响。对钢管柱内
大体积混凝土收缩徐变的影响因索进行分析，提出了减小收缩徐变的措施。[关键词】高层建筑；钢管混凝土柱；径厚比；轴压比；延性；收缩徐变；研究
[中图分类号】TU392.3
【文献标识码】A
【文章编号】1002-8498(2014)14-0011-08
Study onthe Behavior of Giant Concrete Filled Tubular Columns
in Super High-rise Buildings Fan Zhong', Shi Shuai'-2, Zhao Changjun
(1. China Architectural Design & Research Group, Bejing100044,China;
11
2. School of Civil and Transportation Engineering, Bejing University of Civil Engineering and Architecture, Bejing 100044,China)
Abstract: With the rapid development of China's super high-rise buildings, giant concrete filled tubular columns have been used gradually. For large dimension rectangular concrete flled tubular columns, width to thickness ratio for steel plates is the key factor, with multi-cavity and/or stiffeners in the cross sections can be used to reduce the requirement for thick steel plates. In this paper, the calculation method of axial compression/tension-bending bearing capacity and shear bearing capacity for large dimension rectangular concrete filled tubular columns are discussed, and an example of checking the construction phase is given. Comparison of the bearing capacity of the concrete filled tubular columns by using different technical specifications have been done, and significant difference between the calculated results could be found. The relationship between axial compression bearing capacity of circular giant concrete flled tubular columns and width to thickness ratio, concrete strength are studied, and the affect of the axial compression ratio on the ductility are analyzed. Factors affecting the column mass concrete shrinkage and creep are analyzed, the measures to reduce shrinkage and creep are proposed.
Key words:tall buildings; concrete filled tubular column; diameter to thickness ratio; axial compression ratio; ductility; shrinkage and creep; study
.
引言
近年来，我国超高层建筑发展非常迅速。钢管混凝土柱在国内外建筑工程中得到广泛应用，经过长期的理论与试验研究，取得了大量的科研成果，积累了丰富的经验。但是随着建筑高度的增加，普
【作者简介】范重，副总工程师，教授级高级工程师，E-mail；fanz@ cadg-cn
【收稿日期】2014-06-10 万方数据
通尺度的钢管混凝土柱已无法适应超高层建筑巨大的承载力要求。由于巨型钢管混凝土柱承载力高，抗震性能好，施工便捷，在超高层建筑中逐步得到应用。1999年建成的深圳赛格广场")，地下4 层，地上72层，建筑高度291.6m，采用钢管混凝土柱外框架+密柱内筒结构体系。2010年建成的广州电视塔（俗称"小蛮腰"）[3]，总高度610m，采用 24根斜置的钢管混凝土柱与反向钢管柱形成的交叉斜柱体系。2011年峻工的天津津塔(2]建筑总高