【摘要】 采用非线性有限元理论，计算了具有各种宽厚比及不同板件初挠度的箱形截面的极限承载能力，绘出了轴心受压薄壁箱形构件的有效宽度（极限强度）曲线，并提出了轴心受压薄壁箱形构件的有效宽度（极限强度）建议公式．同时进行了试验研究，结果表明，理论分析和试验吻合较好．更多还原

【Abstract】 This paper adopts nonlinear finite element method, controls the strength as the maximum stress in the structure reaches yielding limit. On the basis of extensive numerical computing results on the box section beam columns, this paper investigates the effect of initial imperfections of plates on the strength of box section beam columns. As results, it presents the curves and formulations of ultimate strength and effective ratio of width to thickness of axially loaded thin walled box section beam columns. By contrast with the computing and experimental results, the accuracy of theoretical method has been proved to be quite satisfactory.更多还原