Compression tests and numerical analysis of web-stiffened channels with complex edge stiffeners

Experimental and numerical investigation of perforated cold-formed steel built-up I-section columns with web stiffeners and complex edge stiffeners

“…Three translational degrees of freedom, UX, UY, UZ, of the screws were coupled at the node of the screw connection position. Detailed simulation method about the experiment simply supported boundary condition that was shown in reference Wang et al (2015Wang et al ( , 2016. The distance between the both knife edges at two ends represents specimen's effective length.…”

“…The minor axis overall imperfections (D L ) was defined as the average of D 1 , D 2 , D 3 , and D 4 to eliminate the influence of section torsion and reduce the measuring errors. The detailed measurement method and device were shown in reference (Wang et al, 2016;Zhang et al, 2007). The measured maximum absolute value of imperfections was given in Table 3 for…”

Experimental Investigation of Cross-Sectional Bending Capacity of Cold-Formed Steel Channels Subject to Local-Distortional Buckling Interaction

“…In calculation of the cross-sectional properties of the tested beams in Table 8, an I-shaped section with a double thickness in the web is used as equivalent to original the back-to-back section, as shown in Fig.22. It can be 26 seen in Table 8 that the reduction factor is slightly smaller than 1.0, leading to a small reduction in bending capacity compared to the cross-sectional capacities presented in Table 7. It is worth noting that lateral-torsional buckling didn't occur in the tested specimens.…”

“…More recently, CFS channel columns with intermediate V-shaped web stiffeners and return lip stiffeners were tested between pin-ended boundary conditions by Wang et al [26]. The results of the investigation indicated that a combination of web and edge stiffeners have the potential to increase the ultimate strength of CFS channel columns by up to 70%.…”

10.26: Parametric numerical analysis of cold‐formed steel Σ‐shaped beams under fire

“…Complex edge stiffeners which consist of multiple folds at the free edge can improve the stability and enhance the strength of these members [4]. On the other hand, buckling stress of the elements can be remarkably increased by intermediate stiffeners [5,6]. These ones are generally set in the plate members with relatively large width-thickness ratio to increase stability of plate members [7].…”