Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
권호 표지
DOI QR코드

DOI QR Code

Limitations on the Width-to-Thickness Ratio of Rectangular Concrete-Filled Tubular (CFT) Columns

콘크리트 충전 각형강관 기둥의 폭두께비 제한에 관한 연구

  • 최영환 (서울시립대학교 건축공학과)
  • Received : 2012.01.18
  • Accepted : 2012.08.03
  • Published : 2012.08.27
Download PDF
⟨ Previous Next ⟩

Abstract

The concrete-filled steel tube (CFT) that has an excellent performance can be more economically used when the steel tube has a large width-to-thickness ratio. However, the international provisions such as American Institute of Steel Construction (AISC) limit the use of a slender plate in CFT members, resulting in a less optimal use of CFT. This study verifies the post buckling strength of CFT columns through the experimental program for Hollow Steel Sections (HSS) and CFTs with a with-to-thickness ratio ranged 60 to 100. The study also proposes a relaxed limitations of with-to-thickness ratio compared to the one specified in the current standards.

구조적 우수성이 입증된 콘크리트 충전 강관 (CFT) 시스템은 폭두께비가 큰 강관을 사용할 때 더욱 경제적인 설계가 될 수 있다. 하지만, 현재 국내외의 규준에서는 CFT에 사용할 수 있는 강관의 폭두께비를 제한하고 있어 건설 재료를 보다 더 효율적으로 활용할 수 있는 가능성을 미리 차단하고 있다. 본 연구에서는 폭두께비 60, 70, 80, 90, 100를 갖는 각형 단주 CFT에 대해 압축실험을 실시하여 CFT에서의 좌굴 후 내력을 확인하였고 기존의 규준에서 제시한 폭두께비 제한치를 완화한 식을 제시하였다.

Keywords

References

  1. 대한건축학회(2005) 건축구조기준 및 해설, 기문당.
  2. 대한건축학회(2009) 건축구조기준 및 해설, 기문당.
  3. AISC (1999) Manual of Steel Construction, 3rd Edition, American Institute of Steel Construction, USA.
  4. AISC (2005) Steel Construction Manual, 13th Edition, American Institute of Steel Construction, USA.
  5. Bridge, R.Q. and O'Shea, M.D. (1998) Behaviour of thin-walled steel box sections with or without internal restraint, Journal of Constructional Steel Research, 47(1-2), pp.73-91. https://doi.org/10.1016/S0143-974X(98)80103-X
  6. Eurocode 4 (2004) Design of composite steel and concrete structures, part 1-1. EN 1994-1-1, Brussels, Belgium.
  7. Leon. R.T., Kim. D.K., and Hajjar, J.F. (2007) Limit state response of composite columns and beamcolumns- Part 1: Formulation of design provisions for the 2005 AISC Specification, AISC Engineering Journal, 44(4), pp.341-358.
  8. Salmon, C.G., Johnson, J.E., and Malhas, F.A. (2009) Steel structures, 5th Edition, Prentice Hall.
  9. Uy, B. and Bradford, M.A. (1996) Elastic local buckling of steel plates in composite steel-concrete members, Engineering Structures, 18(3), pp.193-200. https://doi.org/10.1016/0141-0296(95)00143-3

Cited by

  1. Axial Loading Behaviors of Square Concrete-Filled Tubular Columns with Large Width-to-Thickness Ratio Retrofitted using Carbon Fiber Reinforced Polymer Sheets(CFRP Sheets) vol.26, pp.3, 2014, https://doi.org/10.7781/kjoss.2014.26.3.169
  2. Review of Structural Design Provisions of Rectangular Concrete Filled Tubular Columns vol.25, pp.4, 2013, https://doi.org/10.7781/kjoss.2013.25.4.389
  3. 일축 압축력을 받는 콘크리트충전 각형강관 단주의 구조적 거동 vol.22, pp.2, 2012, https://doi.org/10.5762/kais.2021.22.2.617