Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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An Experimental Study on the Stiffness Change of Scaffold Working Plate caused by Damage of Cross-beam

보재의 손상에 따른 비계용 작업발판의 강성 변화에 대한 실험적 연구

  • Sung, Yong-won (Safety/Support Team) ;
  • Kang Min-guk (Department of Safety Engineering, Chungbuk National University) ;
  • Won, Jeong-Hun (Department of Safety Engineering / Department of Disaster Prevention Engineering & Department of Big Data, Chungbuk National University)
  • Received : 2021.01.18
  • Accepted : 2021.10.14
  • Published : 2021.10.31
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Abstract

This study investigated the change in stiffness and deflection of a scaffold working plate caused by damage to a cross-beam in the plate. Experiments were conducted considering various load and damage conditions of cross-beams. A cross-beam falling off from the working plate was considered damaged. The load-displacement curves of specimens at the center of the uniform load showed that the working plate stiffness decreased by 14.66%-1.89%, depending on the load interval due to the damage of one cross-beam. A reduction in the stiffness of 33.94%-40.76% resulted from the damage of two cross-beams. Moreover, the displacement increased by an average of 25% when one cross-beam was damaged and an average of 65% when two cross-beams were damaged. Therefore, damage to the cross-beam in the working plate can potentially cause accidents and harm workers. As the load increases, the risk of an accident due to the aforementioned damage also increases because the stiffness remarkably decreases with the load increase. Further, the damage to the cross-beam mainly reduces the stiffness but increases the displacement rather than the strength of the working scaffold plate.

Keywords

Acknowledgement

This paper was partially supported by Ministry of the Interior and Safety as "Human resource development Project in Disaster management".

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