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http://dx.doi.org/10.14346/JKOSOS.2020.35.3.6

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

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)
Publication Information
Journal of the Korean Society of Safety / v.35, no.3, 2020 , pp. 6-15 More about this Journal
Abstract
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.
Keywords
ultimate load; system scaffold; load test; number of bays; bracing member;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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