Steel and Composite Structures

  • 제18권4호
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  • Pages.1023-1044
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  • 2015
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Efficiency of stiffening plates in fabricated concrete-filled tubes under monotonic compression

  • 투고 : 2014.07.17
  • 심사 : 2014.10.23
  • 발행 : 2015.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Concrete-filled tubes (CFT), formed by an outer steel tube filled with plain or reinforced concrete inside, have been increasingly used these recent decades as columns or beam-columns, especially for tall buildings in seismic areas due to their excellent structural response. This improved behavior is derived from the effect of confinement provided by the tube, since the compressive strength of concrete increases when being subjected to hydrostatic pressure. In circular CFTs under compression, the whole tube is uniformly tensioned due to the radial expansion of concrete. Contrarily, in rectangular and square-shaped CFTs, the lateral flanges become subjected to in-plane bending derived from this volumetric expansion, and this fact implies a reduction of the confinement effect of the core. This study presents a numerical analysis of different configurations of CFT stub columns with inner stiffening plates, limited to the study of the influence of these plates on the compressive behavior without eccentricity. The final purpose is to evaluate the efficiency in terms of strength and ductility of introducing stiffeners into circular and square CFT sections under large deformation axial loading.

키워드

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피인용 문헌

  1. 08.46: Local buckling of thin-walled tubes encased in concrete vol.1, pp.2-3, 2017, https://doi.org/10.1002/cepa.267
  2. Behavior of fibre reinforced cementitious material-filled steel tubular columns vol.23, pp.4, 2017, https://doi.org/10.12989/scs.2017.23.4.465
  3. Composite action of hollow concrete-filled circular steel tubular stub columns vol.26, pp.6, 2015, https://doi.org/10.12989/scs.2018.26.6.693