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以组件法获取的端板连接节点初始刚度计算公式为基础,提出表征连接构造刚性的刚度系数概念,并导出以刚度系数为主要变量的初始刚度计算公式。通过对薄柔钢框架中端板连接节点的初始刚度进行参数计算,拟合出不同节点构造下刚度系数的计算公式,得出节点初始刚度计算的刚度系数法。通过与试验和有限元数据对比表明,该方法具有良好的精度,同时给出刚度系数法的简化计算方法,同样具有较好的精度。
Based on the calculation formula of the initial stiffness of the connection node of the end plate obtained by the component method, the concept of the stiffness coefficient that characterizes the rigidity of the connection structure is proposed and the initial stiffness formula with the stiffness coefficient as the main variable is derived. Through the parameter calculation of the initial stiffness of the end plate connection node in the thin flexible steel frame, the formula of the stiffness coefficient under different node structures is fitted out, and the stiffness coefficient method for calculating the initial stiffness of the node is obtained. The comparison between the experimental data and the finite element data shows that the proposed method has good accuracy. Meanwhile, a simplified calculation method of the stiffness coefficient method is also given, which also has good accuracy.