한국안전학회지 (Journal of the Korean Society of Safety)

  • 제35권3호
  • /
  • Pages.6-15
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  • 2020
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
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Bay 수와 가새재 설치가 시스템 비계 극한거동에 미치는 영향

Effects of Number of bays and Bracing Member on the Ultimate Behavior of System Scaffolds

  • 이선우 (충북대학교 안전공학과) ;
  • 장남권 (충북대학교 안전공학과) ;
  • 원정훈 (충북대학교 안전공학과) ;
  • 정성춘 (안전보건공단 산업안전보건연구원)
  • Lee, Sun-Woo (Department of Safety Engineering, Chungbuk National University) ;
  • Jang, Nam-Kwon (Department of Safety Engineering, Chungbuk National University) ;
  • Won, Jeong-Hun (Department of Safety Engineering, Chungbuk National University) ;
  • Jeong, Seong-choon (Occupational Safety and Health Institute, Korea Occupational Safety and Health Agency)
  • 투고 : 2020.02.11
  • 심사 : 2020.03.11
  • 발행 : 2020.06.30
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초록

This study examined the structural behaviors and ultimate loads of assembled system scaffolds by load tests. Considering the number of bay and bracing installation, four specimens were tested. The bays were divided into 1 bay and 2 bays, with and without the bracing member installed. Failure modes and horizontal displacements show that the whole column buckled without showing no point of inflection in the column, regardless of whether or not braces were installed. Thus, the current design method of selecting the vertical spacing between the horizontal members of the system scaffold as the effective buckling length underestimates the effective buckling length. In case of 1 bay specimens, the ultimate loads between specimens with and with bracing members are similar. However, in case of 2 bay specimens, the specimen with bracing members shows the increased ultimate load of 36% compared with that without bracing members. In addition, as the number of bays in the system scaffold increases, the ultimate load of the unit vertical column increases in case of the specimen with bracing installation. However, in the specimen without bracing members, the ultimate load of the unit column reduces with the increment of the number of bays due to the torsional buckling. Therefore, it is essential to install bracing members to increase the whole strength of system scaffolds and the ultimate load of the unit column.

키워드

참고문헌

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