（1 同济大学，上海 200092； 2 中国建筑西北设计研究院有限公司，西安 710003）
［摘要］针对内置芯柱与不设芯柱的两种钢管混凝土外包式柱脚试件进行了定轴力下的低周水平反复加载试验，分析了钢管混凝土外包式柱脚节点的受力机理，并提出了估算外包式柱脚节点压弯极限承载力的计算方法。对采用两种构造形式的柱脚延性进行了比较分析，得到了芯柱构造可以提高柱脚抗震性能的结论。
［关键词］钢管混凝土；外包式柱脚；试验研究；机理分析；延性；极限承载力
Experimental research on moment resistance property of semi-embeded CFT column base
Wang Yi1, Chen Yiyi1, Wang Wei1, Xu Yongji2, Lü Xudong2 (1 Tongji University, Shanghai 200092, China; 2 China Northwest Building Design Research Institute Co. Ltd., Xi′an 710003, China)
Abstract:Two kinds of semi-embeded CFT column base, with or without inner cage by steel bar, were tested under constantly compressive load and repeated horizontal load. The mechanism of failure of the column bases was analyzed, and an estimation for ultimate bearing capacity of the column base was proposed. It is concluded that the seismic resistance of semi-embeded CFT column base can be raised by inner cage.
Keywords:CFT; semi-embeded column base; experimental research; mechanism analysis; ductility; ultimate capacity
通讯作者：陈以一，教授，博导，Email:yiyichen@tongji.edu.cn。
参考文献
［1］KAWAGUCHI J, MORINO S. Experimental study on strength and stiffness of bear type CFT column base with central reinforcing bars［J］. Composite Construction in Steel and Concrete, 2006, V(N).
［2］JGJ99—98 高层民用建筑钢结构技术规程［S］. 北京：中国建筑工业出版社，1998.
［3］唐九如.钢筋混凝土框架节点抗震［M］.南京：东南大学出版社，1989.