Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Structural Behavior Analysis of System Supports according to Boundary Condition of Joints between Vertical and Horizontal Members

시스템 동바리의 수직재와 수평재 연결부 경계조건에 따른 거동 분석

  • Kim, Gyeoung Yun (Korea Research Institute of Bioscience&Biotechnology) ;
  • Won, Jeong-Hun (Department of Safety Engineering, Chungbuk National University) ;
  • Kim, Sang-Hyo (School of Civil and Environmental Engineering, Yonsei University)
  • 김경윤 (한국생명공학연구원) ;
  • 원정훈 (충북대학교 안전공학과) ;
  • 김상효 (연세대학교 사회환경시스템공학부)
  • Received : 2017.04.17
  • Accepted : 2017.04.25
  • Published : 2017.06.30
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Abstract

This study examined the effect of rotational stiffness of joints between vertical and horizontal members in system supports. In order to prevent repeated disasters of system supports, it is important to examine the accurate behavior of system supports. Among various factors affecting the complex behavior of system supports, this study focused on the stiffness of joints between vertical and horizontal members. The considered joint was modelled by a rotational spring, but the translational displacements were fixed. The stiffness of rotational spring was calculated by utilizing the usable experimental data. In addition, the hinge connection condition, which is generally considered in design and only restrict the translational displacements, was modelled to compare the results. The case with the rotational stiffness in joints showed 3.5 times buckling loads compared to the case without the rotational stiffness. Thus, the structural behavior of the vertical member in system supports was similar to the vertical member with the fixed condition. For the combined stresses of vertical members, the combined stress ratios were reduced 5~6% by considering the rotational stiffness of connecting parts. However, for the horizontal member where showed relatively small stress range, the stresses were increased 2.3~7.6 times by considering the rotational stiffness in connecting parts.

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References

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