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An Analytical Study on the Change of System Supports according to the Brace Installation

가새 설치 여부에 따른 시스템 동바리 거동변화에 대한 해석적 연구

  • Oh, Byoung-Han (Department of Architectural Engineering, Kyonggi University) ;
  • Choi, Byong J. (Department of Architectural Engineering, Kyonggi University)
  • Received : 2018.03.05
  • Accepted : 2018.04.13
  • Published : 2018.04.30

Abstract

System supports are widely used in concrete construction due to the convenience and structural safety at the point of both installation and dismantling. However, there were frequent collapses in the construction sites due to the absence of both structural review and brace installations. Therefore, this paper examines the importance of braces in the system supports. In order to examine the importance of the brace, four types of braces were considered: 100% braces, 50% braces, 25% braces, and without braces. The maximum displacement of the 100% braced model was 0.97 mm, the 50% braced model was 1.13 mm, the 25% braced model was 1.16 mm and the non-braced model was 24.3 mm, respectively. Compared to the model with the without-braces, the model with 100% of the braces installed has a displacement of 4.0%, the model with 50% of the braces showed a displacement of 4.7%, and the model with 25% of the braces appeared to be a displacement of 4.8%. That is, the installation of the braces is effective in reducing the maximum displacement of the system supports and is effective in reducing the maximum displacement with only small number of braces installed.

Keywords

References

  1. G. Y. Kim, J. H. Won and S. H. Kim, “Structural Behavior Analysis of System Supports according to Boundary Condition of Joints between Vertical and Horizontal Members,” J. Korean Soc. Saf., Vol. 32, No. 3, pp. 60-65, 2017. https://doi.org/10.14346/JKOSOS.2017.32.3.60
  2. D. H. Chung, G. Y. Kim and J. H. Won, “Effects of Minimum Horizontal Load on Structural Safety of System Supports,” J. Korean Soc. Saf., Vol. 30, No. 5, pp. 37-43, 2015. https://doi.org/10.14346/JKOSOS.2015.30.5.37
  3. J. L. Peng, S. L. Chan and C. L. Wu, "Effects of Geometrical Shape and Incremental Loads on Scaffold Systems," Journal of Constructional Steel Research, Vol. 63, pp. 448-459, 2007. https://doi.org/10.1016/j.jcsr.2006.07.006
  4. T. Chandrangsu and K. J. R. Rasmussen, "Investigation of Geometric Imperfections and Joint Stiffness of Support Scaffold Systems," Journal of Constructional Steel Research, Vol. 67, pp. 576-584, 2011. https://doi.org/10.1016/j.jcsr.2010.12.004
  5. H. Zhang, T. Chandrangsu and K. J. R. Rasmussen, "Probabilistic Study of the Strength of Steel Scaffold System," Structural Safety, Vol. 32, pp. 393-401, 2010. https://doi.org/10.1016/j.strusafe.2010.02.005
  6. J. L. Peng, C. W. Wu, S. L. Chan and C. H. Huang, "Experimental and Numerical Studies of Practical System Scaffolds," Journal of Constructional Steel Research, Vol. 91, pp. 64-75, 2013. https://doi.org/10.1016/j.jcsr.2013.07.028
  7. KOSHA, "Serious Disaster Casebook," 2007.
  8. MLTM, "Guide to Installation of Shores for a Concrete Bridge," 2007.
  9. Ministry of Employment and Labor, "Industrial Safety and Health Act," 2011.
  10. KOSHA, "Serious Disaster Casebook," 2015.
  11. Korean Society of Steel Construction, "Seoul, Steel Structure Design," First Edition, Goomibook, pp. 207, 2016.
  12. S. H. Lee and B. J. Choi, "An Analytical Study for Safety Check of Vertical Wale Spacing of Steel Pipe Scaffolding," Journal of the Regional Association of Architectural Institute of Korea, Vol. 19, No. 6, pp. 149-157, 2017.
  13. MOLIT, "Standard Specification in Temporary Construction," 2016.