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Title |
Time-Temperature Curve for Fire Safety Assessment of Metropolitan Transit Tunnels
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Keywords |
도시철도 터널 ; 열방출율 ; 시간-온도곡선 ; 내화설계모델 Subway tunnel ; heat rate ; time-temperature curve ; fire design model |
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Abstract |
The study presents a standard time-temperature curve to evaluate the fire performance of subway tunnel structures. The central subway section is 135㎞ long in Korea, the fourth longest in the world. The number of subway tunnels has been increasing rapidly and fire risk is proportional to the tunnel length. However, an adequate time-temperature curve for subway tunnel fires does not exist. Therefore, we studied a proposed foreign fire design model for which the heat rate is based on the traffic, and we present an appropriate time-temperature curve for Korean subway tunnels. The ISO 834 curve was used as a fire design model and the temperature distribution in the tunnel was estimated using numerical analysis. This led to a proposal for effective measures against subway tunnel fires.
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