Steel and Composite Structures

  • 제34권3호
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  • Pages.333-345
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  • 2020
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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Efficient cross-sectional profiling of built up CFS beams for improved flexural performance

  • Dar, M. Adil (Department of Civil Engineering, Indian Institute of Technology Delhi) ;
  • Subramanian, N. ;
  • Atif, Mir (Department of Civil Engineering, National Institute of Technology Srinagar) ;
  • Dar, A.R. (Department of Civil Engineering, National Institute of Technology Srinagar) ;
  • Anbarasu, M. (Department of Civil Engineering, Government College of Engineering Salem) ;
  • Lim, James B.P. (Department of Civil & Environmental Engineering, University of Auckland)
  • 투고 : 2019.03.28
  • 심사 : 2019.12.20
  • 발행 : 2020.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

In the past, many efficient profiles have been developed for cold-formed steel (CFS) members by judicious intermediate stiffening of the cross-sections, and they have shown improved structural performance over conventional CFS sections. Most of this research work was based on numerical modelling, thus lacking any experimental evidence of the efficiency of these sections. To fulfill this requirement, experimental studies were conducted in this study, on efficient intermediately stiffened CFS sections in flexure, which will result in easy and simple fabrication. Two series of built-up sections, open sections (OS) and box sections (BS), were fabricated and tested under four-point loading with same cross-sectional area. Test strengths, modes of failure, deformed shapes, load vs. mid-span displacements and geometric imperfections were measured and reported. The design strengths were quantified using North American Standards and Indian Standards for cold-formed steel structures. This study confirmed that efficient profiling of CFS sections can improve both the strength and stiffness performance by up to 90%. Closed sections showed better strength performance whereas open sections showed better stiffness performance.

키워드

참고문헌

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피인용 문헌

  1. Three-point bending of beams with consideration of the shear effect vol.37, pp.6, 2020, https://doi.org/10.12989/scs.2020.37.6.733