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논문 기본 정보

자료유형
학술저널
저자정보
Krishanu Roy (The University of Auckland) Hieng Ho Lau (Swinburne University of Technology) James B.P. Lim (The University of Auckland)
저널정보
국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.33 No.1
발행연도
2019.1
수록면
37 - 66 (30page)

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In cold-formed steel structures, such as trusses, wall frames and portal frames, the use of back-to-back built-up cold-formed stainless-steel lipped channels as compression members are becoming increasingly popular. The advantages of using stainless-steel as structural members are corrosion resistance and durability, compared with carbon steel. The AISI/ASCE Standard, SEI/ASCE-8-02 and AS/NZS do not include the design of stainless-steel built-up channels and very few experimental tests or finite element analyses have been reported in the literature for such back-to back cold-formed stainless-steel channels. Current guidance by the American Iron and Steel Institute (AISI) and the Australian and New Zealand (AS/NZS) standards for built-up carbon steel sections only describe a modified slenderness approach, to consider the spacing of the intermediate fasteners. Thus, this paper presents a numerical investigation on the behavior of back-to-back cold-formed stainless-steel built-up lipped channels. Three different grades of stainless steel i.e., duplex EN1.4462, ferritic EN1.4003 and austenitic EN1.4404 have been considered. Effect of screw spacing on the axial strength of such built-up channels was investigated. As expected, most of the short and intermediate columns failed by either local-global or local-distortional buckling interactions, whereas the long columns, failed by global buckling. All three grades of stainless-steel stub columns failed by local buckling. A comprehensive parametric study was then carried out covering a wide range of slenderness and different cross-sectional geometries to assess the performance of the current design guidelines by AISI and AS/NZS. In total, 647 finite element models were analyzed. From the results of the parametric study, it was found that the AISI & AS/NZS are conservative by around 10 to 20% for cold-formed stainless-steel built-up lipped channels failed through overall buckling, irrespective of the stainless-steel grades. However, the AISI and AS/NZS can be un-conservative by around 6% for all three grades of stainless-steel built-up channels, which failed by local buckling.
#cold-formed stainless-steel #built-up #screw spacing #back-to-back channels #axial strength #finite element analysis

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참고문헌 (59)

참고문헌 신청
ABAQUS / 2018 / Version 6.14-2, USA / SIMULIA google schola Afshan, S. / 2013 / Strength enhancements in cold-formed structural sections-Part I : Material testing / J. Constr. Steel Res 83:177~188 Crossref American Iron and Steel Institute / 2012 / North American specification for the design of cold-formed Steel Structural Members / NAS S100 google schola American Society of Civil Engineers / 2002 / Specification for the design of cold-formed stainless steel structural members / SEI/ASCE 8-02 google schola Krishanu Roy / 2019 / Experimental and numerical investigations on axial strength of back-to-back built-up cold-formed steel angle columns / Steel and Composite Structures, An International Journal 31(6):601~615 google schola

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