Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Flexural Strength and Rotational Stiffness Estimation of Joint between Vertical and Horizontal Members in System Support

시스템 동바리 수직재와 수평재 연결부의 휨강도와 회전 강성 평가

  • Won, Jeong-Hun (Department of Safety Engineering, Chungbuk National University) ;
  • Lee, Hyung Do (Department of Safety Engineering, Chungbuk National University) ;
  • Choi, Myeong-Ki (Testing & Research Center, Korea Temporary Equipment Association) ;
  • Park, Man Cheol (Testing & Research Center, Korea Temporary Equipment Association)
  • 원정훈 (충북대학교 안전공학과) ;
  • 이형도 (충북대학교 안전공학과) ;
  • 최명기 (한국가설협회 가설기자재시험연구소) ;
  • 박만철 (한국가설협회 가설기자재시험연구소)
  • Received : 2018.05.28
  • Accepted : 2018.08.20
  • Published : 2018.08.31
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Abstract

This study examined the maximum resistant moment and nonlinear rotational stiffness of wedge joint between the vertical and horizontal members of system supports. To examine the maximum resistant moment and propose the nonlinear rotation stiffness of wedge joint, 6 specimens were tested and additional 3 specimens, where the horizontal member was welded to the vertical member, were tested to compare the moment capacity of wedge joints. The average maximum moment in the tested wedge joint was 1.183 kNm which represented about 70 % of the maximum moment developed in the welded specimens. And, as simulating nonlinear rotational stiffness of the wedge joint, a tri-linear model was suggested. The rotational stiffness was estimated as 23.095 kNm/rad in first stage, 7.945 kNm/rad in second stage, and 3.073 kNm/rad in third stage. For the failure mode, the specimen with the wedge joint showed the failure of joint between vertical and horizontal members. However, the specimen with welded joint represented the yielding of horizontal members.

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References

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