Steel and Composite Structures

  • 제23권6호
  • /
  • Pages.633-646
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  • 2017
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Axial compressive behavior of special-shaped concrete filled tube mega column coupled with multiple cavities

  • Wu, Haipeng (College of Architecture and Civil Engineering, Beijing University of Technology) ;
  • Qiao, Qiyun (College of Architecture and Civil Engineering, Beijing University of Technology) ;
  • Cao, Wanlin (College of Architecture and Civil Engineering, Beijing University of Technology) ;
  • Dong, Hongying (College of Architecture and Civil Engineering, Beijing University of Technology) ;
  • Zhang, Jianwei (College of Architecture and Civil Engineering, Beijing University of Technology)
  • 투고 : 2015.01.01
  • 심사 : 2017.02.14
  • 발행 : 2017.04.30
⟨ 이전 논문 다음 논문 ⟩

초록

The compressive behavior of special-shaped concrete filled tube (CFT) mega column coupled with multiple cavities is studied by testing six columns subjected to cyclically uniaxial compressive load. The six columns include three pentagonal specimens and three hexagonal specimens. The influence of cavity construction, arrangement of reinforcement, concrete strength on failure feature, bearing capacity, stiffness, and residual deformation is examined. Experimental results show that cavity construction and reinforcements make it possible to form a combined confinement effect to in-filled concrete, and the two groups of special-shaped CFT columns show good elastic-plastic compressive behavior. As there is no axial bearing capacity calculation method currently available in any Code of practice for special-shaped CFT columns, values predicted by normal CFT column formulas in GB50936, CECS254, ACI-318, EC4, AISCI-LRFD, CECS159, and AIJ are compared with tested values. The calculated values are lower than the tested values for most columns, thus the predicted bearing capacity is safe. A reasonable calculation method by dividing concrete into active and inactive confined regions is proposed. And high accuracy shows in estimating special-shaped CFT columns either coupled with multiple cavities or not. In addition, a finite element method (FEM) analysis is conducted and the simulated results match the test well.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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피인용 문헌

  1. Seismic behavior of reinforced concrete T-shaped columns under compression-bending-shear and torsion vol.20, pp.4, 2017, https://doi.org/10.12989/eas.2021.20.4.431
  2. Bearing capacity of H-section beam wrapped with ceramsite concrete vol.40, pp.5, 2021, https://doi.org/10.12989/scs.2021.40.5.679