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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.33 No.4
- 발행연도
- 2019.1
- 수록면
- 595 - 614 (20page)
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초록· 키워드
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In cold-formed steel (CFS) structures, such as trusses, transmission towers and portal frames, the use of back-to-back built-up CFS unequal angle sections are becoming increasingly popular. In such an arrangement, intermediate welds or screw fasteners are required at discrete points along the length, preventing the angle sections from buckling independently. Limited research is available in the literature on axial strength of back-to-back built-up CFS unequal angle sections. The issue is addressed herein. This paper presents an experimental investigation on both the welded and screw fastened back-to-back built-up CFS unequal angle sections under axial compression. The load-axial shortening and the load verses lateral displacement behaviour along with the deformed shapes at failure are reported. A nonlinear finite element (FE) model was then developed, which includes material nonlinearity, geometric imperfections and modelling of intermediate fasteners. The FE model was validated against the experimental test results, which showed good agreement, both in terms of failure loads and deformed shapes at failure. The validated FE model was then used for the purpose of a parametric study to investigate the effect of different thicknesses, lengths and, yield stresses of steel on axial strength of back-to-back built-up CFS unequal angle sections. Five different thicknesses and seven different lengths (stub to slender columns) with two different yield stresses were investigated in the parametric study. Axial strengths obtained from the experimental tests and FE analyses were used to assess the performance of the current design guidelines as per the Direct Strength Method (DSM); obtained comparisons show that the current DSM is conservative by only 7% on average, while predicting the axial strengths of back-to-back built-up CFS unequal angle sections.
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참고문헌 (38)
참고문헌 신청
ABAQUS / 2018 / Version 6.14-2 / SIMULIA
American Iron and Steel Institute / 2016 / North American specification for the design of cold-formed Steel Structural Members; NAS S100
G. Beulah Gnana Ananthi / 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
Anbarasu, M. / 2015 / Investigation on the behaviour and strength of cold-formed steel web stiffened built-up battened columns / Mater. Struct 48(12):4029~4038
1996 / ASTM: 370 - 92, Standard test methods and definitions for mechanical testing of steel products
American Iron and Steel Institute / 2016 / North American specification for the design of cold-formed Steel Structural Members; NAS S100
G. Beulah Gnana Ananthi / 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
Anbarasu, M. / 2015 / Investigation on the behaviour and strength of cold-formed steel web stiffened built-up battened columns / Mater. Struct 48(12):4029~4038
1996 / ASTM: 370 - 92, Standard test methods and definitions for mechanical testing of steel products
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