在选择合理的材料本构关系和破坏准则的基础上,建立外加强环式钢管混凝土柱-钢梁节点三维非线性有限元计算模型,分析柱梁抗弯强度比及核心区混凝土对节点受力性能的影响。结果表明,钢管混凝土节点柱梁抗弯强度比应加以限制,核心混凝土大大提高了节点的承载能力,节点传力模式符合斜压杆机理。 Based on the selection of reasonable material constitutive relations and failure criteria, a three-dimensional nonlinear finite element model of reinforced concrete filled steel tubular column-steel beam joints is established, and the flexural strength ratio of column girders and the performance of the concrete in the core zone are analyzed influences. The results show that the bending strength ratio of the concrete filled steel tubular column beam should be limited, and the core concrete greatly enhances the bearing capacity of the node, and the node load transfer mode accords with the cusp bar mechanism.