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北京保利国际广场斜交网格外筒由约45°角交叉编织的钢管混凝土斜柱和水平环梁组成,外网格节点汇集了斜柱、水平环梁、水平径向梁等构件,且需灌注混凝土,构造复杂。为了实现节点承载力大于构件承载力的强节点设计原则,采用一种新的节点构造形式,对节点进行概念设计,提出交叉网格外筒节点区域内混凝土竖向抗压强度参与系数的计算方法。为验证节点构造的合理性,了解节点实际工作状态、破坏机理、承载能力和混凝土发挥的作用,进行6个比例为1∶5.5的节点模型试验,并进行有限元分析。结果表明,交叉网格外筒节点的试验值与有限元计算值吻合良好,节点的设计方法可行,节点构造合理,相关经验可用于其他工程相似节点的设计分析。
Beijing Poly International Plaza ramp grid mesh by about 45 ° angle cross braided steel tube concrete inclined column and horizontal ring beam, the outer grid nodes assembled inclined column, horizontal ring beam, horizontal radial beam and other components, and the need for perfusion Concrete, complex structure. In order to realize the strong node design principle that the node bearing capacity is greater than the component bearing capacity, a new node structure is adopted to design the node concept. The calculation method of the coefficient of vertical compressive strength participation of concrete in the cross-grid outer cylinder node area is proposed. In order to verify the rationality of node structure and understand the actual working status of node, failure mechanism, bearing capacity and the role of concrete, six node model tests with a ratio of 1: 5.5 were carried out and the finite element analysis was carried out. The results show that the experimental values of the cross-hatch outer cylinder joints are in good agreement with the calculated values of the finite element method. The design method of the joints is feasible and the joints are well constructed. The relevant experience can be used in the design analysis of similar joints of other projects.