Fire Resistance of Concrete Filled Double Skin Tubular Columns under Axial Load

일정 축력을 받는 Double CFT기둥의 내화성능 평가

  • 정상근 (서울시립대학교 구조연구실) ;
  • 김선희 (서울시립대학교 구조연구실) ;
  • 이성희 (서울시립대학교, (주)티섹구조엔지니어링) ;
  • 최성모 (서울시립대학교 건축학부)
  • Received : 2010.06.17
  • Accepted : 2011.02.21
  • Published : 2011.02.28

Abstract

Although an uncoated CFT column with a high axial-force ratio can be used to secure fire resistance for two hours or less in low-rise buildings, it does not satisfy the three-hour-long fire resistance required in high-rise buildings. Accordingly, so that the uncoated CFT column could be used for high-rise buildings, additional measures for the improvement of its fire resistance should be proposed. In this regard, the use of a Double CFT column as a measure for improving the fire resistance of the uncoated CFT column was proposed in this paper. A fire resistance test was conducted on an uncoated CFT column and a Double CFT column in real scale, under a load. Through such test, the effect of the Double CFT column on fire resistance was evaluated and then compared with that of a variant shape of the cross-section of a steel column.

Acknowledgement

Supported by : 서울시립대학교

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