Steel and Composite Structures

  • 제31권2호
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  • Pages.201-216
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  • 2019
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Local buckling of rectangular steel tubes filled with concrete

  • Kanishchev, Ruslan (Department of Steel and Timber Structures, Institute of Structural Engineering, Civil Engineering Faculty, Technical University of Kosice) ;
  • Kvocak, Vincent (Department of Steel and Timber Structures, Institute of Structural Engineering, Civil Engineering Faculty, Technical University of Kosice)
  • 투고 : 2018.07.21
  • 심사 : 2019.03.30
  • 발행 : 2019.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

This scientific paper provides a theoretical, numerical and experimental analysis of local stability of axially compressed columns made of thin-walled rectangular concrete-filled steel tubes (CFSTs), with the consideration of initial geometric imperfections. The work presented introduces the theory of elastic critical stresses in local buckling of rectangular wall members under uniform compression. Moreover, a numerical calculation method for the determination of the critical stress coefficient is presented, using a differential equation for a slender wall with a variety of boundary conditions. For comparison of the results of the numerical analysis with those collected by experiments, a new model is created to study the behaviour of the composite members in question by means of the ABAQUS computational-graphical software whose principles are based on the finite element method (FEM). In modelling the analysed members, the actual boundary and loading conditions and real material properties are taken into account, obtained from the experiments and material tests on these members. Finally, the results of experiments on such members are analysed and then compared with the numerical values. In conclusion, several recommendations for the design of axially compressed composite columns made of rectangular concrete-filled thin-walled steel tubes are suggested as a result of this comparison.

키워드

참고문헌

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