Steel and Composite Structures

  • 제38권3호
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  • Pages.305-317
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  • 2021
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Mechanical behavior of outer square inner circular concrete-filled dual steel tubular stub columns

  • Ding, Fa-xing (School of Civil Engineering, Central South University) ;
  • Wang, Wenjun (School of Civil Engineering, Central South University) ;
  • Liu, Xue-mei (Department of Infrastructure Engineering, The University of Melbourne) ;
  • Wang, Liping (School of Civil Engineering, Central South University) ;
  • Sun, Yi (School of Civil Engineering, Central South University)
  • 투고 : 2019.05.16
  • 심사 : 2021.01.27
  • 발행 : 2021.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

The mechanical behavior of the outer square inner circular concrete-filled dual steel tubular (SCCFT) stub columns under axial compression is investigated by means of experimental research, numerical analysis and theoretical investigation. Parameters such as diameter ratio, concrete strength and steel ratio were discussed to identify their influence on the mechanical properties of SCCFT short columns on the basis of the experimental investigation of seven SCCFT short columns. By establishing a finite element model, nonlinear analysis was performed to discuss the longitudinal and transverse stress of the dual steel tubes. The longitudinal stress characteristics of the core and sandwich concrete were also analyzed. Furthermore, the failure sequence was illustrated and the reasonable cross-section composition of SCCFT stub column was proposed. A formula to predict the axial load capacity of SCCFT stub column was advanced and verified by the results from experiment and the finite element.

키워드

과제정보

This research is supported by the National Key Research Program of China, Grant No. 2017YFC0703404, and Science Fund for Distinguished Young Scholars of Hunan, Grant No. 2019JJ20029.

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