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http://dx.doi.org/10.9711/KTAJ.2020.22.3.293

A study on the evaluation of fire safety according to the ventilation mode in a train fire at the subway platform  

Ryu, Ji-Oh (Dept. of Mechanical and Automotive Engineering, Shinhan University)
Lee, Hu-Young (Shinhan University Graduate School)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.22, no.3, 2020 , pp. 293-310 More about this Journal
Abstract
The purpose of this study is to present the most effective smoke exhaust mode by comparing the quantitatively evaluated risks according to the smoke exhaust mode when a train fire occurs in a subway platform. Therefore, applying the typical subway platform as a model, train fire scenarios are developed with the evacuation start time and location of the fire train for each exhaust mode. The fire accident rates (F) are calculated and the number of fatalities (N) was quantitatively estimated by fire analysis and evacuation analysis for each scenario. In addition, the F/N curve compared with the social risk assessment criteria and the following conclusions were obtained. In the event of a train fire at the subway station platform, the evacuation must start up within 600 s in maximum to ensure the evacuees' safety. To secure evacuation safety, it is advantageous to operate the HVAC system of the platform in the air-supply mode at station without TVF. Comparing the F/N curve for each exhaust mode with the social risk criteria, it turned out that the risk significantly exceeds the social risk criteria in case of no mechanical ventilation. As a result, this paper shows that the ventilation mode in which TVF are exhausted and HVAC system is operated in the pressurized mode are the most effective smoke exhaust mode for ensuring evacuation safety.
Keywords
Subway platform fire; Smoke exhaust mode; Performance-based fire protection design; Quantitative risk assessment;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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