钢管混凝土斜交框筒节点试验研究

发布时间：2018-01-07 00:05

本文关键词：钢管混凝土斜交框筒节点试验研究　出处：《建筑结构学报》2017年10期 　论文类型：期刊论文

【摘要】：钢管混凝土斜交网格框筒的网格节点汇集了斜柱、环梁、径向梁等构件,其构造和应力分布较为复杂。为了改进该类节点的受力性能,针对工程实际,设计了核心区采用转换柱体与中央竖板相结合的节点构造形式,并以相贯的方式与斜柱连接。为研究此类节点的承载能力和破坏形态,验证节点构造的合理性,实现"强节点弱构件"的设计目标,进行了6个缩尺比为1∶5.5的柱倾斜45°的节点模型试验,在10 MN级自平衡钢结构加载架内,采用两个5 MN千斤顶对相贯节点的柱端施加轴向荷载。结果表明,节点设计符合"强节点弱构件"的设计要求,即使节点区混凝土浇筑不密实,节点的受力性能也能够达到设计要求,节点的设计方法可行,构造合理。
[Abstract]:The grid joints of concrete-filled steel tubular (CFST) oblique grid tube are composed of oblique columns, annular beams, radial beams and so on, the structure and stress distribution are more complex. In order to improve the mechanical performance of this kind of joints, aiming at the engineering practice. In order to study the bearing capacity and failure pattern of this kind of joints, the core region is constructed by the joint structure of the transfer cylinder and the central vertical plate, and connected with the oblique column in an intersecting manner. The rationality of the joint construction is verified. To achieve the design goal of "strong joints and weak members", six joint model tests with 1: 5.5 scale ratio of 1: 5.5 column tilting 45 掳are carried out in the 10 mn self-balancing steel structure loading frame. Two 5 MN jacks are used to impose axial loads on the column ends of the intersected joints. The results show that the design of the joints conforms to the design requirements of "strong joints and weak members", even if the concrete pouring in the joint area is not dense. The design method is feasible and the structure is reasonable.
【作者单位】：北京交通大学土木建筑工程学院;北京市建筑设计研究院有限公司;中国建筑科学研究院;
【分类号】：TU398.9
【正文快照】： 0引言钢管混凝土斜交网格结构是一种新型结构体系,与常规外框架结构相比,该结构体系具有更高的侧向刚度和扭转刚度,适用于超高层建筑。相对于正交的钢管混凝土结构,斜交网格结构的节点是设计中的重点和难点,斜柱相贯节点处的外轮廓截面面积往往小于两根相贯的斜柱构件截面面积

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