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本文采用数值分析方法首次计算了实腹式工字形截面阶形柱极限承载力和荷载-挠度全曲线。理论分析可计入各种初始缺陷的影响,并可考虑加载次序及截面纤维加、卸载效应的影响。经与试验结果比较,证明本文理论方法具有较高的精度。本文在大量参数运算的基础上,分析了规范实用计算方法的误差及其原因,提出了验算阶形柱上、下柱的建议方法,经计算比较,结果令人满意。
In this paper, the ultimate bearing capacity and full load-deflection curve of the solid-section I-shaped cross-section column are calculated for the first time using numerical analysis methods. The theoretical analysis can take into account the effects of various initial defects, and can consider the order of loading and the effect of cross-section fiber addition and unloading effects. Compared with the experimental results, it is proved that the theoretical method of this paper has higher accuracy. On the basis of a large number of parameter calculations, this paper analyzes the errors and causes of the standard practical calculation methods, and proposes the recommended methods for checking the upper and lower columns of the stepped column. After calculation and comparison, the results are satisfactory.