This paper reports a total of 101 experimental results on the axial behaviour of CFS columns having a swaged section at the end or in the middle of channels under a fixed-fixed boundary. For comparison, the equivalent CFS columns with plain sections were also tested; CFS columns with five different stud lengths and three different cross-sections were tested. It was found that compared to the plain sections, the average axial capacities of specimens having a swaged section are reduced by 5.5% for sections having the cross-section dimensions of 65 × 41.3 × 0.75 and 3.9% for sections of 100 × 50 × 0.95, respectively. For the columns with lengths of 1000 mm, 1200 mm, and 1400 mm, their primary failure mode was global buckling. However, for short columns (with lengths of 150 mm and 300 mm), the dominant failure mode was local buckling. A comparison between the experimental results and direct strength method (DSM) predictions from the AISI S100-16 and AS/NZS 4600:2018 was conducted, indicating that the DSM is un-conservative by approximately 1.4% on average while predicting the axial capacities of CFS columns having a swaged section.

中文翻译：

---

新型冷弯型钢型锻截面的轴向承载力：实验测试与设计


本文报告了总共 101 个关于固定边界下通道末端或中部具有型锻截面的 CFS 柱轴向行为的实验结果。为了进行比较，还测试了具有平面截面的等效 CFS 柱；对具有五种不同螺柱长度和三种不同横截面的 CFS 柱进行了测试。结果发现，与普通截面相比，具有锻压截面的样本的平均轴向承载力对于截面尺寸为 65 × 41.3 × 0.75 的截面降低了 5.5%，对于截面尺寸为 100 × 50 × 0.95 的截面，平均轴向承载力降低了 3.9% ， 分别。对于长度为 1000 毫米、1200 毫米和 1400 毫米的柱，其主要失效模式是整体屈曲。然而，对于短柱（长度为 150 毫米和 300 毫米），主要的失效模式是局部屈曲。将实验结果与 AISI S100-16 和 AS/NZS 4600:2018 的直接强度法 (DSM) 预测进行比较，表明 DSM 在预测轴向承载力时平均不保守约 1.4%具有型锻部分的 CFS 柱。