Abstract This paper presents a systematic finite element (FE) based parametric study to quantify the buckling capacity of perforated cold-formed and hot-rolled steel module column. The effects of various key geometric parameters such as eccentricity (location of perforation/column length), shapes (viz. circular, square and hexagonal), sizes (width/diameter) and height (depth) of perforation; and cross-sectional thickness, on the buckling performance of cold-formed and hot-rolled steel stub columns, have been investigated. Based on the analysis, the reduction in column capacity is found to be maximum when the perforation is located at column mid-height, as anticipated. The perforation shapes under consideration have been found to have marginal impact on the buckling capacity of the module stub columns, although the reduction in column capacity is seen to be in the order – square > hexagon > circular perforated columns (having same perforation size). The critical buckling capacity of perforated module column is observed to be linearly decreasing as the perforation size ratio (perforation size/flat-element width) increases. However, for the same width of perforation, increasing the perforation height up to 2.5 times the perforation width, the change in column capacity is found to be negligible. Furthermore, the applicability of existing design for perforated columns has been assessed and found that, although most of the design equations generate conservative and reliable predictions both for cold-formed and hot-rolled steel, the design formulae which are based on effective width method are found to be more accurate as compared to those which are based on total area method.

中文翻译：

---

检修口对方形空心截面模块短柱屈曲性能的影响

摘要 本文提出了一种基于系统有限元 (FE) 的参数研究，以量化穿孔冷弯和热轧钢模块柱的屈曲能力。各种关键几何参数的影响，例如偏心度（穿孔位置/柱长）、形状（即圆形、方形和六边形）、穿孔尺寸（宽度/直径）和高度（深度）；已经研究了冷弯和热轧钢短柱的屈曲性能和截面厚度。根据分析，如预期的那样，当穿孔位于柱子中间高度时，柱子容量的减少是最大的。已发现所考虑的穿孔形状对模块短柱的屈曲能力具有边际影响，尽管可以看出柱容量的减少顺序为 - 方形 > 六边形 > 圆形穿孔柱（具有相同的穿孔尺寸）。观察到穿孔模块柱的临界屈曲能力随着穿孔尺寸比（穿孔尺寸/扁平元件宽度）的增加而线性下降。然而，对于相同的穿孔宽度，将穿孔高度增加到穿孔宽度的 2.5 倍，发现柱容量的变化可以忽略不计。此外，对穿孔柱现有设计的适用性进行了评估并发现，尽管大多数设计方程对冷弯型钢和热轧钢都产生了保守和可靠的预测，