中文摘要：

异形截面多腔钢管混凝土柱的腔体构造对其抗震性能影响很大,结合大连国贸中心大厦结构五边形多腔钢管混凝土巨型柱设计,提出了分腔竖向钢板在基础顶面部位连续和断开两种构造方式.为研究这两种不同构造的五边多腔钢管混凝土巨型柱抗震性能,进行了2组共4个1/7.5缩尺模型试件的低周反复荷载试验.第一组试件为分腔竖向钢板在基础顶面部位连续的截面构造,第二组试件为分腔竖向钢板在基础顶面部位断开的截面构造.每组试件分沿截面对称轴方向、沿垂直截面对称轴方向施加水平荷载两种加载方向.分析了各试件的破坏特征、承载力、耗能、刚度退化、滞回特性和延性.研究表明：分腔竖向钢板在基础顶面部位连续的试件,承载力较高、延性较好、抗震耗能能力较强,但两种加载方向下抗震性能有明显差异;分腔竖向钢板在基础顶面部位断开的试件,承载力略低,但两种加载方向下抗震性能接近.

英文摘要：

Construction measures have a great influence on the seismic performance of special shaped section multi-cell CFST columns. Based on the design of pentagonal multi-cell CFST mega-columns in the building of Dalian International Trade Center, two construction measures which are the vertical steel plate cavity connecting or disconnecting with foundations were put forward. In order to investigate the seismic performance of pentagonal shaped multi-cell CFST mega-columns with different construction details, two groups of four 1/ 7.5 sealed specimens were tested under low cyclic loading. Each group specimen was constructed with vertical steel plate cavity connecting with the foundation or disconnecting with the foundation, In each group, there are two horizontal loading directions： along the symmetric axis m＂ along the vertical axis of symmetry of cross sections. The failure characteristics, load-hearing capacity characteristics and ductility of specimens were analyzed. , energy dissipation capacity, stiffness, hysteresis The results show that the specimens which the vertical steel plate cavity was connected to the foundation have a better load-bearing capacity, ductility and the seismic performance, but the seismic performance has great difference under horizontal loading with different directions. The specimens which the vertical steel plate cavity was disconnected with the foundation have a low load-bearing capacity, but the seismic performances under two loading directions are almost the same.