摘要
介绍了外方内圆(或外矩形内圆)新型复合钢管混凝土柱(又称为新型复合柱)的受力特点和研究进展。通过一项具体工程中柱的设计,基于现有研究成果,给出了新型复合柱的承载力计算公式,提出了其与钢梁连接节点的设计与构造建议,并与普通矩形钢管混凝土柱进行了经济性比较。结果表明:在超高层建筑底部加强区采用新型复合柱,可充分发挥内圆钢管的约束作用,提高其抗震性能;建议的节点构造简单可靠,受力机理与现有研究成果基本相同;计算公式可以偏安全地计算新型复合柱的承载力;当框架柱截面较大时,新型复合柱可比普通矩形钢管混凝土柱节省用钢量。
The characteristics of new composite-sectioned concrete filled steel tubular （CSCFT） columns were introduced as well as recent progress in the study of CSCFT columns. Based on the design procedure of CSCFT columns columns in a project and current research achievements of CSCFT columns, carrying capacity design formulas of CSCFT columns were introduced. The suggestions of design and construction method of I-shape steel beams CSCFT columns connection were proposed, and the economy comparison was conducted between CSCFT columns and common concrete-filled rectangular steel tube. The results indicate that the use of CSCFT columns in super high-rise buildings, especially at the bottom strengthened zone, can exploit the confining effect of inner circular steel tube to the full and improve the seismic performance of CSCFT columns. The proposed steel beams CSCFT columns connection is simple and reliable, and its mechanical behavior is much the same as current research achievements. The proposed design formulas of CSCFT columns can calculate its carrying capacity safely. The use of CSCFT columns save more steel than common concrete-filled rectangular steel tube when the section of frame column is comparatively large.
出处
《建筑结构》
CSCD
北大核心
2014年第4期39-43,共5页
Building Structure
关键词
超高层建筑
新型复合钢管混凝土柱
底部加强区
设计方法
super high-rise building
new composite-sectioned concrete-filled steel tubular column
bottom strengthened zone
design method
