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以大连国贸中心大厦五边形多腔体钢管混凝土巨型柱为原型,为研究截面构造对其偏压性能的影响,进行了2个不同截面构造的巨型柱模型偏心受压性能试验。试件编号分别为CF-Ⅰ和CF-Ⅱ。CF-Ⅰ为五边形四腔体无钢筋笼截面试件,CF-Ⅱ为五边形四腔体带钢筋笼截面试件。试验得到了2个试件的承载力、荷载-变形曲线及损伤破坏特征等。利用ABAQUS有限元软件对各试件进行了数值模拟,计算结果与试验符合较好;在此基础上,分析了外钢管钢板厚度、对称轴分腔隔板厚度、周边竖向肋板厚度对柱偏压性能的影响。研究表明:加设钢筋笼可提高试件的承载力和延性;增加外钢管钢板厚度提高试件承载力和延性的比例,明显大于增加腔体对称轴分腔隔板厚度提高的比例;提高腔内周边竖向肋板的厚度,可明显减轻试件损伤。
In order to study the influence of cross-section structure on its biasing performance, a pentagonal multi-lumen CFST giant column was built in Dalian International Trade Center Building. Eccentric compression tests on two giant column models with different cross sections were carried out. The specimen numbers are CF-I and CF-II, respectively. CF-I was a pentagonal quadruple cage without reinforcement cage cross-section specimens, and CF-II was a pentagonal four-cavity with reinforcement cage cross-section specimens. The bearing capacity, load-deformation curve and damage characteristics of two specimens were obtained. The ABAQUS finite element software was used to simulate the specimens. The calculated results are in good agreement with the experimental results. Based on this, the influences of the thickness of the outer steel plate, the thickness of the symmetrical shaft and the thickness of the vertical rib, The effect of bias performance. The research shows that the addition of steel cage can increase the bearing capacity and ductility of the specimen; increasing the thickness of the steel tube increases the ratio of bearing capacity and ductility, which is significantly larger than increasing the thickness of the cavity; The thickness of the inner vertical rib can obviously reduce the damage of the specimen.