钢管混凝土柱外包式柱脚抗震设计方法探讨  

Discussion of seismic design method on semi-embeded CFT column base

作　　者：徐永基[1] 吕旭东[1] 张又一[1] 陈以一[2] 王伟[2] 王毅[2] 

机构地区：[1]中国建筑西北设计研究院有限公司,西安710003 [2]同济大学,上海200092

出　　处：《建筑结构》2009年第6期1-4,90,共5页Building Structure

摘　　要：钢管混凝土柱外包式柱脚是通过预埋于基础中的定位锚栓将柱脚底板与基础连接在一起,在基础顶面以上一定高度范围内的柱外表面设置抗剪栓钉,以厚度不小于150mm、配置有纵向钢筋和箍筋的钢筋混凝土包裹,形成的钢与混凝土"组合"节点构件,其传力机制较为复杂,计算方法一般参照《高层民用建筑钢结构技术规程》(JGJ99—98)的有关规定进行,常应用于设防烈度6,7度地区的多层建筑结构。目前对于外包式柱脚的抗震性能研究仍不多见。根据两个钢管混凝土柱外包式柱脚节点的单向低周反复载荷试验,来验证该类节点的刚接程度及其滞回性能,对该类节点的抗震设计方法及构造要求进行了探讨。Semi-embeded CFT column base is steel-concrete composite joint component including the stay bolts which are embeded in the foundation to connect the base of column and base plate, the shear studs which are mounted on the surface of column in the specified scope above the foundation, the thickness of the concrete reinforced the longitudinal bar and the stirrup is not smaller than 150mm. Its load transmission mechanism is more complex, and the calculation method is generally based on concerned regulations of technical specification for steel structure of tall building（JGJ 99-98）. Semi-embeded CFT column base is often used in multi- story stuctures located in the area of seismic fortification intensity 6 or 7. At present, the research on the seismic performance has been done insufficiently in this column base. Based on the experiment about semi-embeded CFT column base under the low-cycle repeated load to test for the rigid conection degree and hysteresis performance, the seismic design method and structural request are proposed for this type joints.

关 键 词：钢管混凝土 外包式柱脚 抗震设计 

分 类 号：TU375.3[建筑科学—结构工程] TU352