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利用非线性有限元软件ABAQUS,建立了三维空间外加强环式部分钢框架节点模型,考察了柱壁厚度,梁翼缘宽度、厚度,梁腹板高度,外环板宽度、厚度等几何参数对外加强环式部分钢框架节点的承载能力及刚度的影响,有限元分析结果表明:柱壁厚度、梁翼缘宽度、厚度、腹板高度、外环板宽度、厚度的变化对外加强环式节点的刚度和承载力有明显的影响,通过单参数分析,并利用回归的方法建立包括以上参数的节点极限抗弯承载力,屈服抗弯承载力,初期刚度,屈服刚度评价公式,并证明了公式的可靠性,为该类节点应用于工程实际提供了理论基础。
The nonlinear finite element software ABAQUS was used to establish the node model of steel frame with three-dimensional external reinforcement rings. The influences of geometric parameters such as wall thickness, beam flange width, thickness, web height, The results of finite element analysis show that the stiffness and bearing capacity of externally-reinforced ring-like joints are affected by the variation of wall thickness, beam flange width, thickness, web height, outer ring plate width and thickness Which has the obvious influence. Through the single parameter analysis and the regression method, the formula of ultimate bending resistance, yield bending resistance, initial rigidity and yield rigidity of the joint including the above parameters are established, and the reliability of the formula is proved. This kind of node provides a theoretical basis for engineering practice.