Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Structural Behavior of Welded Built-up Square CFT Column to Beam Connections with External Diaphragm

용접조립 각형 CFT 기둥-보 외다이아프램 접합부의 구조 거동

  • Lee, Seong Hui (Office Equipment Examination Division, Korean Intellectual Property Office) ;
  • Kim, Young Ho (Institute of R&D, Jiseung Consultant Co., Ltd.) ;
  • Choi, Sung Mo (Department of Architectural Engineering, University of Seoul)
  • 이성희 (특허청, 사무기기심사과) ;
  • 김영호 ((주)지승컨설턴트, 기술연구소) ;
  • 최성모 (서울시립대학교, 건축학부)
  • Received : 2015.11.11
  • Accepted : 2016.01.13
  • Published : 2016.04.27
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Abstract

Existing tubes for concrete filled tubular structure are made through welding of four plates irrespective, but the production performance is poor and special welding technique is needed to weld the internal or through diaphragm. Accordingly, We developed a welded built-up square steel tube having a welding lines and a stiffeners at location out of stress concentration. The welded built-up square steel tube occurred a interference with stiffeners at the internal or through diaphragm, therefore researches of a external diaphragm for welded built-up square CFT column connections are needed for the purpose of avoidance of a interfere with stiffeners. In this study we suggest a design formulation for external diaphragm of the welded built-up square CFT external diaphragm connections. Four specimens were manufactured for a experimental test, then we analyzed the behaviors of the specimens.

기존 콘크리트충전 각형강관(CFT) 구조에 사용하는 각형강관은 4개의 판을 용접하여 제작하는 박스칼럼이 일반적이다. 그러나 이러한 강관은 제작효율이 저하되며, 또한 기둥-보 접합부에는 내측 다이아프램과 관통 다이아프램을 용접하는데 특수한 용접기술이 필요하다. 따라서, 얇은 강판을 절곡하는 방식으로 응력집중 위치의 용접을 피하고, 단면효율이 극대화된 내부앵커 돌출형의 용접조립 각형강관을 개발하게 되었다. 용접조립 각형강관은 강관내부에 스티프너가 설치되어 내측 다이아프램과 관통 다이아프램과 간섭이 발생하게 되므로 본 연구에서는 용접조립 각형CFT 기둥-보 접합부로 외다이아프램형식을 채택하고 외다이아프램의 설계식을 제안하였으며, 기둥-보 접합부의 거동을 파악하기 위해 실대형 4개 실험체를 제작하여 구조거동 및 내력을 분석하였다.

Keywords

References

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