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为了研究复式钢管混凝土外环板节点的抗震性能,通过有限元模拟软件ABAQUS设计并建立了加肋和不加肋两个新型复式钢管混凝土外环板节点模型。模型中为钢管和混凝土分别赋予了不同的本构关系,经过设置分析步,边界条件,加载力等过程,得到了两种节点的破坏形态、承载能力、变形特征等。分析结果表明:两个模型计算得到的滞回曲线均为纺锤形,滞回环饱满,节点破坏均为梁端塑性铰破坏,加肋试件可提高节点的承载力和延性。新型节点整体性强,满足结构设计强柱弱梁及强节点弱构件的设计原则,具有较好的抗震性能,可以应用到工程设计实践中。
In order to study the seismic performance of composite concrete-filled steel tube outer ring plate joints, two new type of composite concrete-filled steel tube outer ring plate joint models were designed and established by finite element simulation software ABAQUS. In the model, different constitutive relations were assigned to the steel pipe and the concrete. After the analysis step, boundary conditions, and loading force were set, the failure modes, bearing capacity, and deformation characteristics of the two nodes were obtained. The analysis results show that the hysteresis curves calculated by the two models are all spindle-shaped, the hysteresis loop is full, and the joint damage is the plastic hinge failure of the beam end. The ribbed specimen can increase the bearing capacity and ductility of the joint. The new node has strong integrity and satisfies the design principles of strong structural weak columns and strong weak joints. It has good seismic performance and can be applied to engineering design practice.