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基于已有试验和数值计算结果,研究了钢管混凝土柱(CFST)和钢梁的复合节点模型。采用参数研究法利用有限元分析方法(FEA)分析了节点连接处的弹性剪切刚度和剪切变形,给出了复合节点连接处包含弹性剪切刚度、剪切强度、剪切变形和滞后准则的迟滞模型。该迟滞模型用于整合基于纤维的节点宏单元,节点宏单元通过有限元方法和试验结果得到证实。研究了CFST节点和宏单元框架的整体和局部性能。该模型计算精确,建模方法适当,能够用于大尺寸和复杂组合结构的抗震性能分析。
Based on the existing tests and numerical results, the composite node model of CFST and steel beam was studied. The parametric study method is used to analyze the elastic shear stiffness and shear deformation of the joints at the joints by means of finite element analysis (FEA). The elastic shear stiffness, shear strength, shear deformation and lag criterion Hysteresis model. The hysteresis model is used to integrate fiber-based node macrocells, which are confirmed by finite element method and experimental results. The global and local performance of CFST nodes and macrocell frames are studied. The model is accurate and the modeling method is appropriate, which can be used to analyze the seismic performance of large-size and complex composite structures.