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

Show simple item record

dc.contributor.author Roy, Krishanu en
dc.contributor.author Ting, TCH en
dc.contributor.author Lau, HH en
dc.contributor.author Lim, James en
dc.date.accessioned 2019-10-01T19:58:16Z en
dc.date.issued 2019-09 en
dc.identifier.issn 0143-974X en
dc.identifier.uri http://hdl.handle.net/2292/48225 en
dc.description.abstract Built-up box sections are becoming increasingly popular for column members in cold-formed steel (CFS) construction; uses of such sections include CFS trusses, space frames, and portal frames. In this article, the built-up box sections are formed through two identical lipped channels connected at their flanges with self-drilling screws. In such an arrangement, independent buckling of the individual channels is prevented by the screws. This paper presents an experimental investigation on axial capacity of built-up CFS box sections. Tests were conducted for different values of slenderness from short to slender columns. In total, the results from 16 experimental tests are reported. Of these, 8 tests were conducted on built-up CFS box sections and the remaining 8 tests were conducted on single channel sections. Load-axial shortening relationship, and failure modes are discussed for built-up columns. Nonlinear finite element (FE) models were developed for built-up CFS box sections and single channels. FE models considered material nonlinearities, initial imperfections and modeling of intermediate fasteners. FE results showed good agreement against the test results. A parametric study was conducted which comprises 148 models to investigate the effect of fastener spacing on axial capacity of built-up CFS box sections. Both FE and test results were compared against the design strengths calculated in accordance with the American Iron and Steel Institute (AISI) and Australian and New Zealand Standards (AS/NZS). From the comparison, it was observed that the AISI & AS/NZS are conservative by around 17% while determining the axial capacity of such built-up CFS box columns. en
dc.publisher Elsevier en
dc.relation.ispartofseries Journal of Constructional Steel Research en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Experimental and numerical investigations on the axial capacity of cold-formed steel built-up box sections en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.jcsr.2019.05.038 en
pubs.begin-page 411 en
pubs.volume 160 en
dc.rights.holder Copyright: The author en
pubs.author-url https://www.sciencedirect.com/science/article/pii/S0143974X18308976?dgcid=author en
pubs.end-page 427 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 774516 en
pubs.org-id Engineering en
pubs.org-id Civil and Environmental Eng en
pubs.record-created-at-source-date 2019-06-14 en
pubs.online-publication-date 2019-06-13 en

Files in this item

Find Full text

This item appears in the following Collection(s)

Show simple item record


Search ResearchSpace