Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Structural Fire Analysis of a Composite Beam Protected by Fire-Resistant Materials

내화피복을 적용한 강합성보의 구조화재해석

  • Jun Won Kang (Department of Civil and Environmental Engineering, Hongik University) ;
  • Moon Soo Kang (Contents Development Team, Nexivil Inc.) ;
  • Hyejin Yoon (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 강준원 (홍익대학교 건설환경공학과 ) ;
  • 강문수 ((주)넥시빌 콘텐츠개발팀) ;
  • 윤혜진 (한국건설기술연구원 )
  • Received : 2023.03.28
  • Accepted : 2023.04.05
  • Published : 2023.04.30
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Abstract

This paper presents the effects of fire-resistant materials on the temperature and vertical deflection of a composite beam exposed to fire through nonlinear thermo-mechanical analysis. The fire was modeled using the standard fire curve proposed in American Society for Testing and Materials (ASTM) E119. Fire-resistant materials were modeled by reducing the heat transfer coefficient from the air layer to the beam. The temperature and vertical deflection of the uncoated composite beam were measured using a laboratory fire test, and the results of the structural fire analysis were verified through comparison with experimental results. By introducing the fire-resistance effect, the reduction in the temperature and deflection of the beam for the ASTM E119 standard fire can be reasonably estimated. Based on a case study of the heat transfer coefficient, the fire-resistant effect on the thermo-mechanical response of a composite beam in the event of a fire is presented.

이 논문은 정적 재하상태에 있는 무피복 강합성보와 내화피복을 적용한 강합성보를 대상으로 화재 시 내부 온도 및 수직처짐에 대한 내화피복의 영향을 평가한 결과를 제시한다. 열응력해석을 위한 화재하중으로는 American Society for Testing and Materials E119의 표준화재곡선을 사용했으며, 강재거더 표면에 부착하는 내화재료의 방화효과를 구현하기 위해 외기에서 강합성보로 전달되는 열의 전달계수를 감소시켰다. 실규모 무피복 강합성보에 대한 구조화재실험에서 내부 온도분포와 수직처짐을 측정하였고 실험 결과와의 비교를 통해 비선형 구조화재해석 결과의 타당성을 검증하였다. 내화피복이 적용된 강합성보의 구조화재해석 결과로부터 강재거더 표면에 내화재를 적용할 경우 동일 화재 조건에서 무피복 강합성보에 비해 내부 온도와 수직처짐이 감소함을 알 수 있었다. 또한 열전달계수의 변화에 따른 열응력 응답으로부터 화재 시 강합성보의 온도 및 구조거동에 대한 내화피복의 영향을 제시하였다.

Keywords

Acknowledgement

이 연구는 2022년도 국토교통부 국토교통과학기술진흥원의 국토교통기술촉진연구(21CTAP-C163620-01)와 산업통상자원부의 재원으로 한국에너지기술평가원의 지원(No. 20161510400110)을 받아 수행되었습니다. 연구비 지원에 깊은 감사를 드립니다.

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