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通过一定的等效原则 ,将结构的二阶效应转化为结构的负刚度 ,并通过合成法将框架 -支撑体系等效为一根剪切型悬臂柱和弯曲型悬臂柱的并联等效模型。使用该等效刚度并联模型只需按一阶方法分析可得二阶分析结果 ,避免了常规方法的反复迭代 ,计算速度快 ,所需机时少 ,且具有较高的计算精度
The second order effect of the structure is transformed into the negative stiffness of the structure by a certain principle of equivalence, and the frame-support system is equivalent to a parallel equivalent model of a cantilever column and a cantilever column with a synthetic method. Using this equivalent stiffness parallel model, it is only necessary to analyze the results of the second-order analysis according to the first-order method to avoid repeated iterations of the conventional method, the calculation speed is fast, the required machine time is small, and the calculation accuracy is high