Design of Built-Up Cold-Formed Steel Columns According to the Direct Strength Method

Georgieva, Iveta; Schueremans, Luc; Vandewalle, Lucie; Pyl, Lincy

doi:10.1016/j.proeng.2012.07.066

Cited by 53 publications

(17 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors proposed design formulas for the calculation of equivalent nondimensional slenderness of built-up cold-formed steel battened columns. Georgieva et al [14] examined the validation of the direct strength method to be used in the design of built-up cold-formed steel columns through experimental investigations. Generally, good agreement between experimental and numerical results was achieved.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of built-up cold-formed steel section battened columns

Dabaon

Ellobody

Ramzy

2015

Thin-Walled Structures

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Experimental investigation of built-up cold-formed steel section battened columns

Dabaon

Ellobody

Ramzy

2015

Thin-Walled Structures

View full text Add to dashboard Cite

“…El Aghoury et al (2013) investigated the behaviour of built-up columns made of four equal angles and proposed an empirical equation to calculate the compression load carrying capacity of battened columns. Georgieva et al (2012aGeorgieva et al ( , 2012bGeorgieva et al ( , 2012c conducted extensive experimental and numerical study on innovative built-up CFS sections made of U and Z profiles, evaluated the applicability of DSM on flexural and compression capacity of the members and also discussed the flexibility of fasteners' effect on the capacity of the built-up CFS members. Piyawat et al (2013) developed a simplified axial load capacity equation for doubly symmetric built-up cold-formed tubular and Isections subject to both global and distortional buckling.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of cold-formed steel built-up I-section columns composed of four U-profiles

Anbarasu¹,

Venkatesan²

2018

Advances in Structural Engineering

View full text Add to dashboard Cite

This work reports numerical results concerning the cold-formed steel built-up I-section columns composed of four U-profiles under axial compression. A finite element model is developed by using the software program ABAQUS. The developed model includes geometric, material nonlinearities and geometric imperfections. The finite element model was verified against the experimental results reported in the cold-formed steel built-up open section columns. In the parametric study, the sections are analysed with several cross-sectional dimension ratios and lengths, in order to assess their influence on the buckling behaviour and ultimate strength of cold-formed steel built-up I-section columns. After presenting and discussing the numerical parametric results, the article shows that the current direct strength method in the North American Specification for cold-formed steel compression members design curve fails to predict adequately the ultimate strength of some of the columns analysed and addresses the modification proposed on current direct strength method curves, providing improved predictions of all the numerical ultimate strength available. The proposed method is also assessed by reliability analysis.

show abstract

“…Zhang and Young [5] presented a modified DSM and showed that predicted design strengths are reliable and conservative for built-up open section columns. Georgieva et al [6] investigated the applicability of the DSM for design of built-up CFS through experimental studies and suggested that a similar modified design methodology based on DSM can be adopted in structural standards. A modified DSM for the cold-formed built-up I-section columns was presented by Lu et al [7] who showed that the current DSM can lead to excessively unsafe estimates for built-up I-section columns.…”

Section: Introductionmentioning

confidence: 99%

07.13: On extending the direct strength method to the design of cold‐formed steel built‐up columns

2017

View full text Add to dashboard Cite

This paper presents a numerical investigation of the effects of discrete fasteners on the buckling behaviour of cold-formed steel (CFS) built-up columns and concludes with the assessment of the applicability of the current direct strength method (DSM) to the design of these members. To this end, the compound strip method is first utilised to accurately model the buckling behaviour of CFS built-up columns under axial compression via introducing connecting elements to represent the contribution of discrete fasteners. A series of elastic buckling analyses with different levels of composite action are carried out to obtain the "signature curves" corresponding to the considered CFS built-up sections. The performed studies comprise of variations in cross-sections, end boundary conditions and fastener spacing. Utilising the developed numerical techniques, the ultimate strength of the sections are estimated and an adjustment procedure is suggested to extend the current DSM equations to the design of CFS built-up columns. The proposed adjustment is verified against the existing experimental data and shown to be capable and accurate in capturing the expected behaviour of CFS built-up members with or without stiffeners.

show abstract

Design of Built-Up Cold-Formed Steel Columns According to the Direct Strength Method

Cited by 53 publications

References 3 publications

Experimental investigation of built-up cold-formed steel section battened columns

Experimental investigation of built-up cold-formed steel section battened columns

Behaviour of cold-formed steel built-up I-section columns composed of four U-profiles

07.13: On extending the direct strength method to the design of cold‐formed steel built‐up columns

Contact Info

Product

Resources

About