Experimental and numerical investigations on the axial capacity of cold-formed steel built-up box sections

Flexural capacity of gapped built-up cold-formed steel channel sections including web stiffeners

Parametric study and simplified design equations for cold-formed steel channels with edge-stiffened holes under axial compression

Numerical investigation into the buckling behaviour of face-to-face built-up cold-formed stainless steel channel sections under axial compression

Improved design procedure for battened cold-formed steel built-up columns composed of lipped angles

This study is focussed on the performance evaluation of built-up cold-formed steel (CFS) columns under monotonically increasing axial compression loading. Five test specimens of built-up columns were fabricated using four CFS angle sections connected by single lacing systems. Width-to-thickness ratios and slenderness ratios of chord and lacing elements, and height of columns were varied in the test specimens. Column strengths, axial load vs. displacement response, mode of failure, and deformed configurations were the main parameters evaluated in the experimental investigation. In addition, a numerical study was conducted to predict the behaviour of laced built-up CFS columns using a finite element software ABAQUS. The developed numerical models were validated using the test results. Test results were used to develop the column strength curves for built-up laced CFS columns. Finally, the results of this study were compared with the design strength predictions by North American Standards and European Standards for CFS sections.

Behaviour of laced built-up cold-formed steel columns: Experimental investigation and numerical validation

Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections

To address the various instability problems in cold-formed steel members, many researchers have mainly focused on developing innovative sectional profiles wherein geometry of the section plays a vi...

https://journals.sagepub.com/doi/pdf/10.1177/1369433218782767

Behaviour of partly stiffened cold-formed steel built-up beams: Experimental investigation and numerical validation:

This study presents a novel method of improving the strength and stiffness of cold-formed steel (CFS) beams. Flexural members are primary members in most of the structures. Hence, there is an urgent need in the CFS industry to look beyond the conventional CFS beam sections and develop novel techniques to address the severe local buckling problems that exist in CFS flexural members. The primary objective of this study was to develop new CFS composite beam sections with improved structural performance and economy. This paper presents an experimental study conducted on different CFS composite beams with simply supported end conditions under four point loading. Material properties and geometric imperfections of the models were measured. The test strengths of the models are compared with the design strengths predicted by using Australian/New Zealand Standard for cold-formed steel structures. Furthermore, to ensure high precision testing, a special testing rig was also developed for testing of long span beams. The description of test models, testing rig features and test results are presented here. For better interpretation of results, a comparison of the test results with a hot rolled section is also presented. The test results have shown that the proposed CFS composite beams are promising both in terms of better structural performance as well as economy.

M. Adil Dar

Papers

Behaviour of laced built-up cold-formed steel columns: Experimental investigation and numerical validation

Improved design procedure for battened cold-formed steel built-up columns composed of lipped angles

Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections

Behaviour of partly stiffened cold-formed steel built-up beams: Experimental investigation and numerical validation:

Structural Performance of Cold-Formed Steel Composite Beams