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在试验研究的基础上,应用有限元程序ABAQUS,对节点区柱钢管不连通式钢管混凝土柱-平板节点在轴压、偏压作用下的荷载-位移曲线、裂缝开展、混凝土及钢筋应力、受压破坏面等展开分析,揭示了节点区的应力分布规律。结果表明,受压极限状态时,节点区的破坏面为连接上柱柱脚和下柱柱脚之间的区域;而节点区配置环向钢筋及下柱钢管插入节点区内的构造方式有利于改善节点区混凝土的应力状态,从而提高节点的受压承载力。结合试验研究提出了该节点的设计方法。
Based on the experimental study, the finite element program ABAQUS was used to analyze the load-displacement curve, crack initiation, concrete and steel bar stresses of concrete-filled steel tubular column-plate joints under joint compression and axial compression in the node area. Crushing the surface and other analysis, revealing the node area of the stress distribution. The results show that the failure area of the node area is the area connecting the upper column foot and the lower column foot in the condition of compression limit, and the configuration of the ring reinforcement and the lower column steel pipe insertion node in the node area is advantageous Improve the stress state of the concrete in the node area, so as to improve the bearing capacity of the node. Combined with the experimental study of the node design method.