当前位置: X-MOL 学术J. Build. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Web crippling of slotted perforated Cold-Formed Steel channels under EOF load case: Simulation and design
Journal of Building Engineering ( IF 6.4 ) Pub Date : 2021-09-12 , DOI: 10.1016/j.jobe.2021.103306
Perampalam Gatheeshgar 1 , Husam Alsanat 2 , Keerthan Poologanathan 1 , Shanmuganathan Gunalan 3 , Natalia Degtyareva 4 , Somadasa Wanniarachchi 5 , Ishqy Fareed 5
Affiliation  

The development of new Cold-Formed Steel (CFS) channels with staggered slotted perforations has led to advances in improved thermal efficiency of buildings. These new generations of CFS channels reduce the thermal bridging effect interrupting the direct heat transfer across the web. However, the integration of these staggered perforations creates challenges in terms of reduced structural capacity. It is therefore vital to study the structural behaviour under various loading scenarios. Therefore, the web crippling performance of staggered slotted perforated channels under End-One-Flange (EOF) loading condition and flanges unfastened to bearing plate was investigated in the present paper. Finite Element (FE) models were developed to capture the web crippling strength and failure mechanism of these staggered slotted perforated channels. The validity of the FE modelling techniques was ensured by comparing the web crippling experimental results of CFS channels with solid and perforated webs under the EOF loading. Upon validation, an extensive parametric study comprising 360 FE models was then performed with the aim of (i) examining the effect of staggered slotted configurations and (ii) the corresponding degree of web crippling strength reduction. The results provided a direct mean of notable web crippling strength reduction up to 74%. The numerically derived data points were used to develop a reduction factor based new design equation, which can directly be applied to predictive equations of web crippling. The proposed approach yields more accurate and consistent strength predictions and improves the understanding of CFS channels with staggered slotted perforations.



中文翻译:

开槽穿孔冷弯钢槽钢在 EOF 载荷工况下的腹板瘫痪:模拟与设计

具有交错开槽穿孔的新型冷弯型钢 (CFS) 通道的开发促进了建筑物热效率的提高。这些新一代 CFS 通道减少了热桥效应,中断了整个网络的直接热传递。然而,这些交错穿孔的整合在降低结构能力方面带来了挑战。因此,研究不同载荷情况下的结构行为至关重要。因此,本文研究了在端一法兰 (EOF) 加载条件下和未紧固到承重板上的法兰的交错开槽穿孔通道的腹板损坏性能。开发了有限元 (FE) 模型来捕捉这些交错开槽穿孔通道的腹板破坏强度和失效机制。通过比较 CFS 通道与实心和穿孔腹板在 EOF 载荷下的腹板瘫痪实验结果,确保了有限元建模技术的有效性。经验证,随后进行了包括 360 FE 模型的广泛参数研究,目的是 (i) 检查交错开槽配置的影响和 (ii) 相应程度的腹板​​破坏强度降低。结果提供了显着的幅材断裂强度降低高达 74% 的直接平均值。数值导出的数据点用于开发基于减少因子的新设计方程,该方程可直接应用于网络瘫痪的预测方程。所提出的方法产生更准确和一致的强度预测,并提高对具有交错开槽穿孔的 CFS 通道的理解。

更新日期:2021-09-12
down
wechat
bug