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为了研究方钢管混凝土柱-钢梁半刚性节点的力学性能和影响因素,以方钢管混凝土柱-钢梁半刚性节点为研究对象,采用数值模拟分析方法研究了节点角钢厚度、角钢短肢长肢比及螺栓直径等参数对该类节点受力性能的影响规律,并给出了节点初始转动刚度的建议公式。结果表明:角钢厚度的变化对节点初始刚度影响较小,但对节点的塑性刚度和承载力影响较大;角钢短肢长肢比在一定范围内对节点刚度和承载力影响较明显,超过范围后只对节点的承载力有较大影响;螺栓直径的变化对节点承载力和刚度有一定影响,但影响程度较小,可不作为主要的影响参数。
In order to study the mechanical properties and influence factors of the semi-rigid joints of square concrete-filled steel tubular columns-steel beams, the semi-rigid joints of square concrete-filled steel tubular columns and steel beams are taken as the research object. The numerical simulation method is used to study the joint angle, The influence law of bolt diameter and other parameters on the mechanical behaviors of such nodes, and the formula of the initial rotation stiffness of the node is given. The results show that the variation of angle thickness has little effect on the initial stiffness of the joint, but has a great influence on the plastic stiffness and bearing capacity of the joint. The ratio of the short limb to the short-limb has more obvious effect on the node stiffness and bearing capacity within a certain range, The bearing capacity of the joint only has a greater impact on the bearing capacity of the node; the change of the bolt diameter has an impact on the bearing capacity and stiffness of the node, but the impact is small, not as the main impact parameters.