KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Temperature Distribution of Wet-Mixed High Strength Sprayed Polymer Mortar for Fire Resistance of Tunnel

터널 내화용 고강도 습식 스프레이 폴리머 모르타르의 화재 발생시 내부온도분포

  • 원종필 (건국대학교 사회환경시스템공학과) ;
  • 최석원 (건국대학교 대학원) ;
  • 박찬기 (건국대학교) ;
  • 박해균 (삼성물산(주) 건설부문 토목사업본부 토목기술팀)
  • Received : 2006.02.27
  • Accepted : 2006.06.07
  • Published : 2006.07.31
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Abstract

Concrete has advantages in fire situations as it is non-combustible and has low thermal conductivity. However, concrete that is not designed against fire can experience significant explosive spalling from the build-up of pore pressures and internal tensile stresses when heated. In this study, the performance of wet-mixed high strength sprayed polymer mortar for fire resistance of tunnel system was evaluated by experimentally and numerically. The fire test was performed in fire resistance(electric) furnace according to RABT(Richtlinien fur die Ausstatung und den Betrieb von $Stra{\beta}entunneln$) time heating temperature curve, so as to evaluate the temperature distribution with cover thickness of wet-mixed high strength sprayed polymer mortar for fire resistance of tunnel system. Based on experimental results and numerical analysis, the proper cover thickness of wet-mixed high strength sprayed polymer mortar determined the more than 4cm.

콘크리트는 열전도열이 작은 불연성의 재료이다. 그렇지만 콘크리트는 화재에 저항하도록 설계되지 않으면 열을 받을시 공극압과 내부인장응력이 발생하여 폭렬이 발생한다. 본 연구에서는 터널 내화용 습식 고강도 스프레이 폴리머 모르타르의 성능을 실험적 및 수치해석적으로 평가하였다. 이를 위하여 화재시험을 수행하였다. 시험은 RABT 온도가열곡선을 이용하여 내화로에서 수행하였으며, 터널 내화용 습식 스프레이 모르타르의 피복두께에 따른 온도분포를 평가하였다. 실험 및 수치해석적 분석 결과를 기본으로 하여 터널 내화용 습식 고강도 스프레이 폴리머 모르타르의 적정 피복두께는 4cm이상으로 결정하였다.

Keywords

References

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