为研究北京“中国尊”多腔钢管混凝土巨型分叉柱不同构造措施对其受压性能的影响,进行了2个1/10缩尺的分叉柱节点区域模型试件轴心受压力学性能试验。设计了原型柱缩尺试件BAC以及在试件BAC基础上未配置纵向加劲肋及构造钢筋的试件WAC。分析了试件破坏特征,承载力、刚度及退化过程、延性、耗能能力等。研究表明:试件BAC满足受力要求,承载力较高、刚度退化速率缓慢、延性较好、耗能能力较强;与试件BAC相比,试件WAC构造措施简化,但其承载力变化不大,刚度退化较快、延性较差、耗能能力较弱;异形截面钢管混凝土柱后期变形发展与构件截面不规则程度有关。在忽略横隔板作用情况下,采用不同承载力计算方法并按是否考虑竖向构造措施的影响进行了承载力计算,结果表明采用不同方法计算承载力时,横隔板对承载力的贡献均较大,且因计算方法不同存在差异。 In order to study the influence of different structural measures of Beijing “China Zun ” multi-cavity concrete filled steel tubular mega-forked bifurcation column on its compression performance, two 1 / 10- Mechanical properties test. The prototype column scale test specimen BAC was designed, and the specimen WAC was not equipped with longitudinal stiffeners and steel bars. The failure characteristics, bearing capacity, stiffness and degradation process, ductility and energy dissipation capacity were analyzed. The results show that the BAC meets the requirements of bearing capacity, the bearing capacity is high, the rate of stiffness degradation is slow, the ductility is good, and the energy dissipation capacity is strong. Compared with the BAC specimen, the WAC structure measures are simplified, but the bearing capacity changes The stiffness degenerates rapidly, the ductility is poor, and the energy dissipation capacity is weak. The post-deformation deformation of CFST columns with different shape is related to the degree of irregularity of member cross section. Under the condition of neglecting the function of the diaphragm, the calculation methods of different bearing capacity are adopted and the bearing capacity is calculated according to whether vertical structure measures are taken into account. The results show that when different methods are used to calculate the bearing capacity, the contribution of the diaphragm to the bearing capacity Larger, and because of differences in calculation methods.