Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Improved Transmission of UHSC Column Loads by Puddling of Fiber Reinforced UHSC

강섬유 보강 초고강도 콘크리트의 확대 타설을 통한 기둥 하중 전달 성능 향상

  • Lee, Joo-Ha (Dept. of Civil and Environmental and Architectural Engineering, Korea University) ;
  • Yang, Jun-Mo (Dept. of Civil and Environmental and Architectural Engineering, Korea University) ;
  • Lee, Seung-Hoon (Institute of Tech., Samsung Engineering & Construction Co., Ltd.) ;
  • Yoon, Young-Soo (Dept. of Civil and Environmental and Architectural Engineering, Korea University)
  • 이주하 (고려대학교 건축.사회환경공학과) ;
  • 양준모 (고려대학교 건축.사회환경공학과) ;
  • 이승훈 (삼성물산(주) 건설부문 기술연구소) ;
  • 윤영수 (고려대학교 건축.사회환경공학과)
  • Published : 2007.04.30
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Abstract

This study reports on the structural characteristics of slab-column connections using fiber-reinforced ultra-high-strength concrete (UHSC). Compression tests were performed on two slab-column and four isolated column specimens. In the column load tests, slab loads were also applied on the slab-column specimens so that the actual confinement condition at the slab-column joint was considered. The main parameter investigated was the "puddling" of fiber-reinforced UHSC. This paper also investigates the effects of some parameters, such as confinement of slab concrete, steel fibers, and concrete strength of the joint, related to the ability of the slab-column specimens and isolated column specimens without the surrounding slab to transmit axial loads from the UHSC columns through slab-column connections. Furthermore, the ACI Code (2005) and the CSA Standard (2004) are compared to the experimental results. The beneficial effects of the puddling of fiber-reinforced UHSC on the transmission of column loads through slab-column connections are demonstrated.

본 연구는 강섬유 보강 초고강도 콘크리트가 적용된 슬래브-기둥 접합부의 구조적 특성을 파악하였다. 2개의 슬래브-기둥 시험체와 4개의 독립 기둥 시험체의 기둥 하중 전달 실험이 수행되었다. 기둥 하중 실험 수행시, 슬래브-기둥 접합부의 실제 구속 상태를 고려하기 위해 슬래브 하중을 적용하였다. 주 변수로는 강섬유 보강 초고강도 콘크리트의 확대 타설이며, 이에 더하여 슬래브의 접합부 구속 효과, 강섬유 보강, 그리고 접합부의 콘크리트 강도 등이 실험을 통해 파악되었다. 또한, ACI Code(2005)와 CSA Standard(2004)의 예측식과 실험 결과를 비교하였다. 슬래브-기둥 접합부를 통한 기둥 하중 전달에 대한 강섬유 보강 초고강도 콘크리트의 효과를 실험을 통해 확인하였다.

Keywords

References

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