5-7 December 2018 - Hong Kong, China


Ninth International Conference on Advances in Steel Structures (ICASS 2018)



Zehua Wang 1* and John Papangelis 2

School of Civil Engineering, The University of Sydney, Sydney, Australia

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Built-up boxed cold-formed channel section beams, which consist of two single-channel sections fastened on the top and bottom flanges, are used as flooring and roofing members in buildings. By combining the two channels to form a closed box section, this can increase the flexural-torsional buckling capacity of the beam beyond the capacity of two single channels. The flexural-torsional buckling strength very much depends on the torsion and warping constants of the beam. Although these section properties can be easily determined for a single channel section, the calculation of these quantities for a boxed section with intermediate fasteners is not so well understood due to the discontinuity of the cross-section. In this paper, a finite element analysis is used to analyze a built-up boxed beam under uniform and non-uniform torsion. The results are used to calculate the torsion constant and warping constant for built-up boxed cold-formed channel sections with different geometries and fastener spacings. The results are compared with two single-channel sections and with closed boxed sections.


Torsion; Built-up Channel; Boxed section; Torsion constant; Warping constant; Finite element analysis

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First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM