STIFFNESS COEFFICIENT METHOD TO CALCULATE THE INITIAL STIFFNESS OF END-PLATE JOINT IN SLENDER STEEL FRAME
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摘要: 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。Abstract: Stiffness coefficient describing the rigidity of end-plate connection is defined based on the formula that was obtained by component method to calculate the initial stiffness of end-plate joint.A simplified expression for the initial stiffness is then deduced taking stiffness coefficient as main variable.By parameter analysis for the initial stiffness of end-plate joints in slender steel frames,the expressions of stiffness coefficient under different joint constructions are fitted.Accordingly,stiffness coefficient method to calculate the initial stiffness is developed.The method behaves with enough accuracy as compared with the results of tests and finite element analysis.So does the short-cut methods which is derived at the same time.
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