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根据试验和理论研究成果,对方钢管混凝土柱穿心高强螺栓-端板节点核心区的受力机理进行了分析,建立了节点核心区的受力模型和屈服机制,推导了节点核心区的抗剪承载力计算公式。公式不仅考虑了螺栓和柱轴力对节点核心区实际受力状态的影响,而且考虑了钢管对混凝土的约束作用。用推导的公式计算了3个方钢管混凝土柱穿心高强螺栓-端板节点试验模型节点区的抗剪承载力,计算结果与试验结果吻合较好。
Based on the experimental and theoretical research results, the force mechanism of core-region of CFST-CFST bolt-end plate is analyzed, and the force model and yield mechanism of the core region are established. The shear resistance Bearing capacity calculation formula. The formula not only considers the influence of bolt and column axial force on the actual stress state in the core region of the node, but also considers the restraint effect of steel tube on concrete. The shear capacity of three CFST columns in the node region of CFST-end plate joints was calculated by the derived formula, and the calculated results are in good agreement with the experimental results.