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提出一种超静定桁架极限载荷的分析方法。利用一维增量弹塑性有限元法对桁架进行分析 ,通过优化选取桁架承受极限载荷时增量法中载荷增量的步长 ,从而得到各种加载方式下的极限载荷。实例表明可得到较高的计算精度。
An analytical method for the ultimate load of statically indeterminate truss was proposed. The one-dimensional incremental elasto-plastic finite element method is used to analyze the truss structure. The ultimate load under various loading methods is obtained by optimizing the step of the incremental load increment method when the truss is subjected to the ultimate load. Examples show that higher accuracy can be obtained.