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 SFRC filled Built-up Square Columns

강섬유 콘크리트가 충전된 용접조립 각형강관 기둥의 구조성능 실험연구

  • Kim, Sun Hee (Department of Architectural Engineering, University of Seoul) ;
  • Yom, Kong Soo (Harmony Structural Engineering) ;
  • Choi, Sung Mo (Department of Architectural Engineering, University of Seoul)
  • 김선희 (서울시립대학교, 건축공학부) ;
  • 염경수 ((주)하모니구조엔지니어링) ;
  • 최성모 (서울시립대학교, 건축학부)
  • Received : 2014.05.13
  • Accepted : 2014.09.17
  • Published : 2015.02.27
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Abstract

This study suggests mixing steel fibers in concrete to secure the toughness of the columns. Therefore, to evaluate the structural behavior of welded built-up square columns filled with steel fiber reinforced concrete, ten stub column specimens were fabricated for compressive loading test with variables of steel fiber mixing ratio and loading condition. It is deduced that the steel fibers continue to provide tensile strength even after the concrete cracks and thus improve the strength and behavior of the column when bending moment is applied to it. A small amount of steel fibers can improve compressive strength and bending strength and thus produce economically efficient results when employed in structural design.

본 연구에서는 콘크리트 내에 강섬유를 혼입하여 기둥자체의 인성력을 확대시키는 방안을 구조실험을 통해 분석하고자 한다. 내부 앵커형 용접조립 각형 기둥에 강섬유 보강 콘크리트를 충전하여 구조 거동을 고찰하였다. 강섬유 혼입량과 가력조건을 변수로 하여 총 10개의 단주를 제작하여 단조재하 실험을 수행하였다. 그 결과 휨 모멘트력이 발생될 때 강섬유 콘크리트는 특유의 성질인 균열 후 인장강도가 발현되어 내력 및 거동에 유리하게 작용되는 것으로 보인다. 미소 분량의 강섬유 혼입으로 축력과 휨내력이 향상 가능한 것은 매우 합리적인 단면설계가 가능하며 이를 적극적으로 설계에 반영될 필요가 있다.

Keywords

References

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