5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

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


NUMERICAL INVESTIGATION AND PARAMETRIC STUDY ON THE BEHAVIOUR OF

AXIALLY LOADED BACK-TO-BACK GAPPED BUILT-UP COLD-FORMED STEEL CHANNELS

 

Krishanu Roy 1*, Tina Chui Huon Ting 2, Hieng Ho Lau3 and James B.P. Lim 1

1 Department of Civil and Environmental Engineering, The University of Auckland, New Zealand

E-mails: Krishanu Roy: This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

2 Faculty of Engineering and Science, Curtin University Malaysia, Miri, Sarawak, Malaysia

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3 Faculty of Engineering, Computing and Science, Swinburne University of Technology, Sarawak Campus, Kuching, Sarawak, Malaysia

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DOI:10.18057/ICASS2018.P.001

ABSTRACT:

This paper presents a finite element investigation to investigate the axial capacity of CFS channels, connected back-to-back with a gap.  A finite element model was firstly developed and verified against test results, currently conducted on CFS built-up gapped columns by the authors. Initial imperfections and material properties of the test specimens were included in the FE model. The column strengths, buckling modes, load verses displacement and load verses strain relationships were predicted from the FEA and compared against the test results. The verified FE was used for an extensive parametric study, comprising 84 models to investigate the effect of the gap between the back-to-back channels, link channel spacing, different column lengths and cross-sectional geometries. The FE results together with the test results were compared against the design strength, calculated in accordance with the AISI and AS/NZ Standard, which showed that the design standards can be conservative by only 5% when non-dimensional slenderness that considers the gap, is used to calculate the design strength of such columns.

Keywords:

Gap, Cold-formed steel, Back-to-back gapped sections, Buckling, Finite element analysis, Axial capacity.

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IMPORTANT DATES

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