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A Study on the Effective Length Factor for Steel Plate-Concrete Structures using Cementless Concrete

무시멘트 콘크리트를 활용한 강판콘크리트 구조의 유효좌굴길이 계수 분석에 관한 연구

  • Han, Myoung-Hwan (Department of Architectural Engineering, Kyonggi University Graduate School) ;
  • Choi, Byong-Jeong (Department of Architectural Engineering, Kyonggi University Graduate School)
  • 한명환 (경기대학교 일반대학원 건축공학과) ;
  • 최병정 (경기대학교 일반대학원 건축공학과)
  • Received : 2018.04.16
  • Accepted : 2018.05.04
  • Published : 2018.05.31

Abstract

Domestic studies on steel plate concrete structures have focused on nuclear structures with high strength. In this study, the SC structure was applied to the general structure, and the SC structure that is advantageous in terms of safety and construction was limited to a special structure. As a basic study for applying SC, this paper proposes basic design information of a SC structure applying cement concrete to plan the structure, which is suitable for eco - friendliness by replacing concrete cement, an important factor in a SC structure, with blast furnace slag. This study examined the compression characteristics and the effective length factor under central compression load. To calculate the effective length factor, the Euler column theory was applied without applying plate theory. The effective length factor was calculated from the yield strength of the steel plate, buckling of the steel plate, and the point at which the concrete was broken. In addition, this study examined whether the maximum compressive strength meets the national and international reference equations with the slenderness ratio (B/t) as a parameter. By analyzing the buckling of the specimen by applying the column theory and selecting the strain of the measured steel plate, the effective length factor was analyzed and compared with the value presented in the reference equation.

강판 콘크리트구조에 대한 국내 연구는 대체적으로 강도가 큰 원전 구조물에 초점을 맞추고 있다. 현재 안전성과 시공성 측면에서 유리한 SC구조는 특수구조물에만 한정되어 적용되어 왔으며, 최근 구조적으로 장점이 명확한 SC구조에 대해 일반건축물에 적용하기 위한 연구가 진행되고 있다. 본 연구에서는 SC 구조를 일반 건축물에 적용하기 위한 기초 연구로서 특히 SC 구조에서 중요한 요소인 콘크리트의 시멘트를 고로슬래그로 대체하여 친환경성에 부합한 구조체를 계획하기 위해 무시멘트 콘크리트를 적용한 SC 구조의 기본 설계 정보를 제시하고자 한다. 이 논문에서는 압축 특성, 중심 압축 하중을 받는 유효좌굴길이계수에 대해 연구하였다. 유효좌굴길이계수를 산정하기 위해서 판 이론을 적용하지 않고 오일러 기둥 이론으로 계산하였다. 유효좌굴길이계수를 계산할 때 필요한 변형률을 측정하여 강판의 항복강도, 강판의 좌굴 및 콘크리트가 파단되는 시점에서의 유효좌굴길이계수를 계산하였다. 또한, 세장비(B/t)를 변수로 최대 압축강도가 국외 및 국내 기준식에 부합하는 지를 검토하였으며 기둥 이론을 적용하여 실험체의 좌굴을 분석하고 측정된 강판의 변형률을 선택하는 방법에 따라 유효좌굴길이계수를 분석하여 기준식에서 제시하는 값과 비교하였다.

Keywords

References

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