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广州新客站的钢管混凝土柱节点尺度大、构造复杂,采用了穿心承重销和穿心钢筋相结合的节点形式。确定了以钢桁架牛腿抗剪为主进行抗剪验算,综合混凝土梁和钢桁架牛腿的作用进行抗弯验算的设计原则。采用MSC.MARC软件对节点进行有限元分析,研究了节点受力性能、破坏模式和协同工作能力,以及钢桁架牛腿的作用。钢桁架牛腿可以控制节点区塑性铰出现的位置,改善节点的刚度、承载能力和延性,同时还是钢管混凝土柱和混凝土梁之间过渡的重要组成部分。对节点区域的应力分布和剪力分布的研究表明,该节点具有较好的整体性能。
The concrete filled steel tubular column node of Guangzhou New Passenger Station is large in scale and complex in structure, and adopts the joint form of the through-hole bearing and the through-core steel. Determine the shear of steel truss leg shear mainly based on shear checking, the comprehensive design of concrete beam and steel trusses role of bending test calculation. Using MSC.MARC software, the finite element analysis of the joints was carried out to study the mechanical properties of joints, failure modes and the ability to work together, and the role of steel truss legs. The steel trusses can control the position of the plastic hinges in the joint area and improve the stiffness, load-carrying capacity and ductility of the joints. It is also an important part of the transition between the concrete filled steel tubular columns and the concrete beams. The study on the stress distribution and shear distribution in the node area shows that the node has good overall performance.