Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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An Experimental Study on Structural Performance of Welded Built-up Square CFT Stub Columns

용접조립 각형 CFT 단주의 구조특성에 관한 실험적 연구

  • 이성희 (서울시립대학교 도시과학연구원) ;
  • 최영환 (서울시립대학교) ;
  • 염경수 ((주)하모니 구조엔지니어링) ;
  • 김진호 ((재)포항산업과학연구원) ;
  • 최성모 (서울시립대학교 건축학부)
  • Received : 2007.10.17
  • Accepted : 2008.05.07
  • Published : 2008.10.10
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Abstract

Welded built-up square tubes are manufactured by flare welding at the center of the column width for cold-formed L-shaped four-piece plates and improved composite effect of concrete and steel by vertical inner anchor. Also, the axial resistance of concrete is increased by the thinness of the steel column, and the composite effect of concrete and steel prevents the steel column from local buckling. In this study, we introduced a manufacturing method of built-up square column steel square concrete-filled tubular column with vertical inner anchor and superior structural performance of the square stub column verified by the structural test for 15 specimens with parameters of shape of tube (built-up square tube, general steel tube), width over thickness of the steel tube (B/t=50, 58, 67) and the strength of concrete (f'c=10MPa, 50MPa).

용접조립 각형강관은 얇은 강판을 L형으로 절곡한 4개의 단위 부재를 플레어 용접으로 용접한 강관으로 용접조립 각형강관이 CFT 기둥으로 사용될 경우 콘크리트와 강관 폭의 중앙에 설치된 리브가 국부좌굴을 방지하는 역할을 하며 강관은 내부의 콘크리트의 구속하여 콘크리트의 구조내력을 향상시키는 역할을 한다. 본 연구에서는 용접조립 각형강관기둥의 제작방법을 소개하고 용접조립 각형강관과 용접조립 각형CFT 기둥 의 구조성능을 평가하기 위해 강관의 형상(용접조립 각형강관, 일반강관)과 폭두께비(B/t=50, 58, 67), 콘크리트의 강도(f'c=, 10MPa, 40MPa) 를 변수로 총 15개의 실대형 실험체를 제작하여 구조실험을 수행하였으며 용접조립 각형강관의 단면효율과 구조내력의 우수성을 확인하였다.

Keywords

References

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