超高层建筑巨型钢管混凝土柱性能研究  

Study on the Behavior of Giant Concrete Filled Tubular Columns in Super High-rise Buildings

作　　者：范重[1] 仕帅 赵长军[1] 

机构地区：[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

出　　处：《施工技术》2014年第14期11-18,46,共9页Construction Technology

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肋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。对不同技术规程中圆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入研究,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素进行分析,提出了减小收缩徐变的措施。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 filled 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 dimension rectangular concrete filled tubular columns construction phase is given. Comparison of the bearing capacity and shear bearing capacity for large are discussed, and an example of checking the 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 filled 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.

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 

分 类 号：TU392.3[建筑科学—结构工程]