2023 Volume 29 Issue 72 Pages 725-730
This study aims to fit an approximate equation to evaluate the global buckling load of single-layer space frames with crossing-grids. Through linear buckling analysis, buckling load factors associated with various geometric parameters in a total of 1470 cases are analyzed, and established a dataset as an input into a statistical software 1stOpt. Accordingly, an approximate equation can be fitted based on the regression analysis aided by the 1stOpt. In addition, the authors examine the overfitting and accuracy of the approximate equation, and consequently propose an applicability range in which the rate of difference concentrates in ± 25%.
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