Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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Experimental Study for Improving Method of Load Bearing and Spalling Prevention of 100 MPa High Strength Concrete Column

100 MPa급 고강도 콘크리트 기둥의 폭렬방지 및 하중지지력 향상방안에 관한 실험적 연구

  • Cho, Bum-Yean (Fire Research Center, Korea Institute of Construction Technology) ;
  • Kim, Heung-Youl (Fire Research Center, Korea Institute of Construction Technology) ;
  • Kim, Hyung-Jun (Fire Research Center, Korea Institute of Construction Technology) ;
  • Kwon, In-Kyu (Dept. of Fire & Disaster Prevention, Kangwon National Univ.) ;
  • Kim, Kyeong-Ok (MokYang Architecture & Engineering)
  • 조범연 (한국건설기술연구원 화재안전연구센터) ;
  • 김흥열 (한국건설기술연구원 화재안전연구센터) ;
  • 김형준 (한국건설기술연구원 화재안전연구센터) ;
  • 권인규 (강원대학교 소방방재학부) ;
  • 김경옥 (목양엔지니어링건축사사무소)
  • Received : 2012.10.21
  • Accepted : 2012.12.07
  • Published : 2012.12.31
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Abstract

In this study, we have conducted a fire resistance experiment under loading condition on standard fire to evaluate the fire resistance performance according to applying reinforcement of methods for reinforcing the lateral confinement of reinforced bars (Wire Rope) and fire resistance reinforcement (Fiber-Cocktail) for 100 MPa high strength concrete column. In the result of the experiment, in case of the test objects applied by hoop, it has been shown as not possible to be applied as the fire resistance structure after satisfying the fire resistance performance for 43 minutes. In case of applying the wire rope as lateral confinement of reinforced bar, instead of hoop in identical volume ratio, it has been shown as possible to apply it to the buildings with under 4 floors after satisfying the fire resistance performance fro 69 minutes with any separate fire resistance process. Also, in case of applying with mixing wire rope method, instead of hoop, and Fiber-Cocktail mix method to prevent spall, it has been shown as possible to apply to the buildings with over 12 floors after satisfying the fire resistance performance for 180 minutes.

본 연구는 100 MPa급 고강도 콘크리트 기둥에 대하여 횡구속력 보강 및 내화보강 공법 적용 유무에 따른 내화성능을 평가하기 위하여 표준화재 재하조건에서 내화실험을 실시하였다. 실험결과, 띠철근을 적용한 실험체의 경우 43분의 내화성능을 만족하여 내화구조로써 적용할 수 없는 것으로 나타났으며, 동일체적비로 띠철근을 대체한 와이어로프를 적용할 경우 별도의 내화처리 없이 69분의 내화성능을 만족하여 4층 이하 건물에 적용할 수 있는 것으로 나타났다. 또한 띠철근을 대체한 와이어로프 및 폭렬방지를 위한 Fiber-Cocktail 혼입공법을 혼합 적용 할 경우 180분의 내화성능을 만족하여 12층 초과 건물에 적용할 수 있는 것으로 나타났다.

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References

  1. A. M. Budek, M. J. N. Priestley and C. O. Lee, "Seismic Design of Columns with High-Strength Wire and Strand as Spiral Reinforcement", ACI Structural Journal, Vol. 99, No. 5, pp. 660-670 (2002).
  2. Andrew H. Buchanan, "Structural Design for Fire Safety", John Wiley & Sons Ltd. (2002).
  3. John A. Purkiss, "Fire Saftey Engineering Design of Structures", Butterworth Heinemann (1996).
  4. K. D. Hertz, "Limits of Spalling of Fire-exposed Concrete", Fire Safety Journal, pp. 103-116 (2003).
  5. Y. Anderberg, "Spalling phenomena of HPC and OC", NIST Workshop on Fire Performance of High Strength Concrete in Gaithersburg (1997).
  6. J. M. Franssen, "Failure Temperature of a System Comprising a Restrained Column Submitted to Fire", Fire Safety Journal, Vol. 34, pp. 191-207 (2000). https://doi.org/10.1016/S0379-7112(99)00047-8
  7. H. Y. Kim, H. J. Kim, H. K. Jeon, K. S. Youm and J. S. Lee, "A Study on Fire Performance and Heat Transfer of HPC Column with Fiber- Cocktail in ISO Fire under Loading Condition", Journal of the Korea Concrete Institute, Vol. 22, No. 1, pp. 29-39 (2010). https://doi.org/10.4334/JKCI.2010.22.1.029
  8. H. J. Kim, H. Y. Kim, K. H. Park, J. Y. Jung and K. H. Kwon, "An Experimental Study on Thermal Damage and Spalling of Concrete Lining in Tunnel Fire", Journal of Korea Institute of Fire Science and Engineering, Vol. 23, No. 6, pp. 54-63 (2009).