Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
권호 표지
DOI QR코드

DOI QR Code

Safety Evaluation of Void Plywood Slab System with form Work Panel

거푸집 패널이 부착된 중공슬래브의 안전성 평가

  • 허무원 (단국대학교 건축학부) ;
  • 채경훈 (단국대학교 건축공학과) ;
  • 박태원 (단국대학교 건축학부) ;
  • 강현욱 ((주)윈하이텍 기술연구소) ;
  • 박현수 (신한대학교 디자인학부)
  • Received : 2021.10.27
  • Accepted : 2021.11.15
  • Published : 2021.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, Full-scale hollow slab Mock-up with VPS(Void Plywood Slab System) was produced. Through Mock-up, the safety of the flat plate hollow slab against short-term sagging and long-term sagging is to be evaluated. The hollow rate of the mock-up specimen to which the hollow core slab was applied was designed to be 24%. When loading through concrete blocks, the most central part of the slab was deflection 8.88mm when loading. However, it shows a safe value compared to the reference value (ln/240=17.93mm) for short-term deflection. As a result of 3 months of measurement of the mock-up experiment, the deflection at the center of the slab increased by 6.792mm from the initial deflection. In addition, it was found that the reference value by the load used suggested by KBC2016 was satisfied.

본 연구에서는 거푸집 패널이 부착된 실물 스케일의 중공슬래브 Mock-up을 제작하여 즉시 처짐 및 장기 처짐에 대한 플랫 플레이트 중공 슬래브의 안전성을 평가하고자 한다. 중공재가 적용된 Mock-up 실험체의 중공률은 24%로 설계하였다. 콘크리트 블록 하중 재하 시 슬래브의 가장 중앙부의 처짐인 No2의 경우 재하 시 처짐이 8.88mm 발생하였으며 이는 즉시 처짐에 대한 기준 값(ln/240=17.93mm)에 비하여 안전한 값을 나타내고 있다. 3개월간 처짐 량 계측 결과, 중앙부 처짐 량은 초기 처짐에서 6.792mm 더 추가되어 처짐이 발생하였지만, 이는 국내 구조 기준에서 제시하고 있는 사용하중에 의한 기준 값을 만족하고 있는 것으로 나타났다.

Keywords

Acknowledgement

본 연구는 국토교통부 국토교통기술촉진연구사업(과제번호: N20CTAP-C157477-01)에 의한 연구 결과이며 이에 감사드립니다.

References

  1. Hur, M. W., Chae, K. H., Hwang, K. S., Yoon, S. H., and Park, T. W. (2021), Structural Performance of One-way Void Plywood Slab System with form work Panel. Journal of the Korea Institute for Structural Maintenance and Inspection, 25(1),7-15. https://doi.org/10.11112/JKSMI.2021.25.1.7
  2. Lee, Y. J., Kim, H. G., Kim, M. J., Kim, D. H., and Kim, K. H. (2020), Evaluation of Flexural Performance for Prestressed Concrete Hollow Core Slabs, Journal of the Korea Concrete Institute, 32(2), 193-200. https://doi.org/10.4334/jkci.2020.32.2.193
  3. Lee, Y. J., Kim, H. K., Kim, M. J., Lee, J. S., and Kim, K. H. (2019), Evaluation of Structural Performance for Prestressed Concrete Hollow Core Slabs. Journal of the Korea Concrete Institute, 31(5), 505-512. https://doi.org/10.4334/jkci.2019.31.5.505
  4. Park, M. K., Lee, D. H., Han, S. J., and Kim, K. D. (2019), Web-shear Capacity of Thick Precast Prestressed Hollow-core Slabs Units Produced by Extrusion Method. International Journal of Concrete Structures and Materials, 13(7), 19-32. https://doi.org/10.1186/s40069-018-0329-5
  5. Cho, G. Y., Park, Y. C., and Choi. C. S. (2018), An Experimental Study on the One-way Shear Strength of Void Slabs with Automatic Prefabrication of Welded Wire Truss, Journal of the Korea Concrete Institute, 30(3), 305-314. https://doi.org/10.4334/JKCI.2018.30.3.305
  6. Kim, J. Y., and Park, S. B. (2019), Analysis of Effects of Reshoring Works on Short and Long Term Deflections of Flat Plates. Journal of the Korea Institute for Structural Maintenance and Inspection, 21(1), 40-48.
  7. Hwang, H. J., Park, H. G., Hong, G. H., Kim, J. Y., and Kim, Y. N. (2014), Measurement and Perdicion of Long-term Deflection of Flat Plate Affected by Construction Load. Journal of the Korea Concrete Institute, 26(5), 615-625. https://doi.org/10.4334/JKCI.2014.26.5.615
  8. Chun, S. C., Tak, S. Y., Lee, S. H., Sho, K. H., and Ha, R. H. (2014), Evaluaion of Construction Loads of Slabs and Shores with Removing Shores and Placing Reshores. Journal of th Koera Concrete Institute, 26(3), 385-392. https://doi.org/10.4334/JKCI.2014.26.3.385
  9. Choi, S. M., Eom, T. S., and Kim, J. Y. (2012), Parametric Study on Long-Term Deflections of Flat Plates Considering Effects of Construction Loads and Cracking. Journal of the Korea Institute for Structural Maintenance and Inspection, 16(1), 44-54. https://doi.org/10.11112/JKSMI.2012.16.1.044
  10. Hwang, H. J., Park, H. G., Hong, G. H., Im, S. H., and Kim, J. Y. (2010), Effects of Shore Stiffness and Concrete Cracking on Slab Construction LoadI: Theory. Journal of th Koera Concrete Institute, 22(1), 41-50. https://doi.org/10.4334/JKCI.2010.22.1.041
  11. Hwang, H. J., Hong, G. H., Park, H. G., Kim, Y. N., and Kim, J. Y. (2010), Effects of Shore Stiffness and Concrete Cracking on Slab Construction Load II: Measurements and Comparisons. Journal of th Koera Concrete Institute, 22(1), 51-58. https://doi.org/10.4334/JKCI.2010.22.1.051
  12. Kim, J. Y., Im, J. H., and Park, H. G. (2009), Calculations of Flat Plate Deflections Considering Effects of Construction Loads and Cracking. Journal of the Korea Concrete Institute, 21(6), 797-804. https://doi.org/10.4334/JKCI.2009.21.6.797
  13. Hur, M. W., Woo, H. S., Park, J. M., Kang, H. W., and Park, T. W. (2021), Evaluation of Punching Shear Safety of a Two-Way Void Plywood Slab System with Form. Journal of the Korea Institute for Structural Maintenance and Inspection, 25(5), 1-8.
  14. ACI Committee 318, (2019) Building Code Requirements For Structural Concrete and Commentary.
  15. Korean Building and Commentary, (2016) Architectural Institute of Korea.
  16. BS EN, (2004) Eurocode 2 : Design of Concrete Structures, British Strandards, UK, pp.225.
  17. Hur, M. W., Chae, K. H., Hwang, K. S., Yoon, S. H., and Park, T. W. (2020), Structural Performance of One-way Void Plywood Slab System with form work Panel, Journal of the Korea Institute for Structural Maintenance and Inspection, 25(1), 7-15. https://doi.org/10.11112/JKSMI.2021.25.1.7