Fire Resistance of U-shape Hybrid Composite Beam

신형상 U형 하이브리드 합성보의 내화성능에 관한 연구

  • Kim, Sung Bae (The Naeun Structural Engineering) ;
  • Kim, Sang Seup (School of Architectural Engineering, The Korea University of Technology & Education) ;
  • Ryu, Deog Su (The Naeun Structural Engineering) ;
  • Choi, Seng Kwan (School of the Built Environment, University of Ulster)
  • Received : 2013.03.17
  • Accepted : 2013.07.24
  • Published : 2013.08.27


This paper aims to experimentally investigate the fire resistance of U-shaped hybrid composite beams protected by spay and paint insulations. Subjected to two and three hours of the Standard ISO fire, the flexural performance of 4.4m beams with/without imposed loadings was examined with respect to failure criteria such as deflection and deflection rate of the mid-span and temperatures measured in the steel section. The results demonstrated that the proposed configuration of the composite beam is able to achieve a very competitive 3-hour fire resistance rating in economical aspects.


fire resistance performance;spray-on fire protection;fireproof paint;composite beam;hybrid forming beam(HyFo beam)


  1. 김인석, 김학수 (2008) 철근콘크리트와 강을 합성한 복합 단면보의 구조거동평가, 한국강구조학회논문집, 한국강구조학회, 제20권, 제5호, pp.665-673. Kim, I.S. and Kim, H.S. (2008) Structure Behavior Evaluation of Beams composited with Steel and Reinforced Concrete, Journal of Korean Society of Steel Construction, KSSC, Vol. 20, No. 5, pp.665-673 (in Korean).
  2. 권인규 (2010) 하중비에 따른 강재 보의 한계온도에 관한 실험적 연구, 한국강구조학회논문집, 한국강구조학회, 제22권, 제6호, pp.581-588. Kwon, I.K. (2010) Experimental Study on Limiting Temperatures of Structural Beams made with Structural Steel According to Load Ratios, Journal of Korean Society of Steel Construction, KSSC, Vol. 22, No. 6, pp.581-588 (in Korean).
  3. 김해수, 이치형 (2010) 내화피복 종류에 따른 각형 CFT 기둥의 온도분포에 관한 실험적연구, 한국강구조학회논문집, 한국강구조학회, 제22권, 제6호, pp.523-532. Kim, H.S. and Lee, C.H. (2010) An Experimental Study on the Temperature Distribution of Square CFT Columns According to the Types of Fire Protection, Journal of Korean Society of Steel Construction, KSSC, Vol. 22, No. 6, pp.523-532 (in Korean).
  4. 김선희, 원용안, 최성모 (2012) 비재하 가열실험을 통한 이중강관 CFT기둥의 잔존강도 평가연구, 한국강구조학회 논문집, 한국강구조학회, 제24권, 제1호, pp.81-89. Kim, S.H., Won, Y.A., and Choi, S.M. (2012) A Study on the Evaluation of Residual Strength of Double Concrete Filled Tube Column by Unstressed test (2012) Journal of Korean Society of Steel Construction, KSSC, Vol. 24, No. 1, pp.81-89 (in Korean).
  5. 김성배, 이원록, 김정연, 이승배, 유덕수, 김대회, 김상섭 (2012) 신형상 U형 하이브리드 합성보의 휨성능에 관한 연구, 한국강구조학회논문집, 한국강구조학회, 제24권, 제5호, pp.521-534. Kim, S.B., Lee, W.R., Kim, J.Y., Lee, S.B., Ryu, D.S., Kim, D.H., and Kim, S.S. (2012) Study on the Flexible Strength of U-shape Hybrid Composite Beam, Journal of Architectural Institute of Korea, AIK, Vol. 24, No. 5, pp.521-534 (in Korean).
  6. 김성배, 이창남, 김우철, 김상섭 (2009) 하중재하 영향에 의한 합성보의 화재거동에 관한 연구, 한국화재소방학회논문집, 한국화재소방학회, 제23권, 제2호, pp.27-35. Kim, S.B., Lee, C.N., Kim, W.C., and Kim, S.S. (2009) "Study on the Fire Behaviour of Composite Beam with Loading and Unloading", Journal of Korean Institute of Fire Sci. & Eng., Vol. 23, No. 2, pp. 27-35 (in Korean).
  7. 김성배, 최승관, 한상훈 (2009) 스터드커넥터의 내화성능에 관한 연구, 한국화재소방학회논문집, 한국화재소방학회, 제22권, 제4호, pp.59-66. Kim, S.B., Choi, S.K., and Han, S.H. (2009) "Study on Fire Performance of Stud Connector", Journal of Korean Institute of Fire Sci. & Eng., Vol. 22, No. 4, pp.59-66 (in Korean).
  8. KS F 2257-1 (2005) 건축 구조 부재의 내화 시험 방법 -일반요구사항, 한국산업표준. KS F 2257-1 (2005) Methods fire resistance test for elements of building construction - General requirements, Korea Standard Association (in Korean).
  9. KS F 2257-6 (2006) 건축 구조 부재의 내화 시험 방법 -보의 성능조건, 한국산업표준. KS F 2257-1 (2006) Methods fire resistance test for elements of building construction - Specific requirements for beams, Korea Standard Association, (in Korean).
  10. 국토해양부 고시 제2010-331호 (2010) 내화구조의 인정 및 관리기준, 국토해양부. Ministry of Land Infrastructure and Transport Notification No.2010-331 (2010) Fireproof Structure Recognition and Management Standards, Ministry of Land Infrastructure and Transport (in Korean).
  11. 한국건설기술연구원 (2010) 내화구조 인정 및 관리업무 세부운영지침. Institute of Construction Technology (2010) Fireproof Structure Recognition and Management of Detailed Operating Instructions (in Korean).
  12. 대한민국 특허청, 발포성 내화도료 조성물 및 이를 사용한 피도물에의 내화성 부여방법 (2007) 특허등록번호 10-0688254. The Korea Intellectual Property Office (2007) Antifire painting composition and its usage, Patent Registration No. 10-0688254 (in Korean).
  13. Michael Spearpoint (2008) Fire Engineering Design Guide 3rd Edition, New Zealand center for advanced engineering.
  14. 대한건축학회 (2004) 콘크리트충전 강관구조 요설, 기문당. AIK (2004) Concrete Filled Tube(CFT) Structures (in Korean).
  15. 대한건축학회 (2009) 국토해양부고시 건축구조기준 및 해설, 기문당. AIK (2009) Standard of Architectural Structure and Commentary, Kimundang, Korea (in Korean).
  16. 한국강구조학회 (2009) 국토해양부제정 하중저항계수설계 법에 의한 강구조설계기준, 구미서관. KSSC (2009) Standard of Design of Steel Structure by Load and Resistance Factor Design Method (in Korean).
  17. 日本建築学会 (1998) 鋼構造限界状態設計指針.同解説. AIJ (1998) Recommendation for Limit State Design of Steel Structures,
  18. Segui, W.T. (2007) Steel Design, 4th Ed., THOMSON.
  19. Charles, G., Salmon, J.E., and Johnson, F.A.M. (2009) Steel Structures - Design and Behavior, Pearson Education Inc., 5th Ed., pp.804-828.
  20. AISC (2011) Steel Construction Manual, 14th Ed., American Institute of Steel Construction.
  21. 한국건설기술연구원 (2013) 민원업무전산시스템, 내화구조인정현황 .

Cited by

  1. Fire Performance Analysis of SLIM AU Composite Beam vol.16, pp.4, 2016,
  2. Evaluation of Fire Resistance of Unprotected Concrete-filled Rectangular Steel Tubular Columns under Axial Loading vol.26, pp.4, 2014,