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基于梁柱法给出空间半刚性钢框架静力弹塑性分析的数值计算方法。使用由端压力下梁柱的精确解所得到的稳定性函数来考虑二阶效应,结合总体弹塑性概念,利用屈服面给出材料的弹塑性性能。利用1个由6个平动和转动弹簧组成的零长度独立单元来模拟钢框架梁-柱连接的刚度,其中转动弹簧的刚度使用Kishi-Chen功耗模型。广义位移控制方法通过增量迭代来求解非线性平衡方程。将非线性响应结果与现有研究进行对比,验证了数值计算方法的精确性。
Numerical Calculation Method for Static Elastoplastic Analysis of Semi - Rigid Steel Frames Based on Beam - Column Method. The second order effect is taken into account using the stability function obtained from the exact solution of the beam at the end pressure, and the elastic-plastic properties of the material are given using the yield surface. The stiffness of the steel frame beam-column connection was modeled using a zero-length standalone unit consisting of six translational and rotational springs, of which Kishi-Chen power model was used to determine the stiffness of the rotating springs. The generalized displacement control method solves the nonlinear equilibrium equation through incremental iteration. The nonlinear response results are compared with the existing research to verify the accuracy of the numerical method.