A study on evacuation characteristic by cross-sectional areas and smoke control velocity at railway tunnel fire
A study on evacuation characteristic by cross-sectional areas and smoke control velocity at railway tunnel fire
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铁路隧道火灾截面积与排烟速度疏散特性研究
DOI：
10.9711/ktaj.2015.17.3.215
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Jong
中科院分区：
文献类型：
--
作者：
Ji;Jin;D. Rie;Jong
本研究以横截面积（97 m 2、58 m 2、38 m 2）和风速（0.5、1.0、1.5、2.0、2.5、3.0、3.5 m/s）为变量，分析了下车时间对自身方式和疏散路线宽度的依赖，并通过各风速横截面积对火灾和疏散特性进行了评价。结果表明，当断面变小时，隧道内有害气体密度的增大大于断面面积减小的比值。在小的横截面积的情况下，从最初的火灾周围的环境表明超过了性能为基础的设计建议的极限标准。在疏散特性的有效疏散时间分析中，以能见度评价有效疏散时间时，有效疏散时间最短。基于性能评价的有效疏散时间与针对有害气体的致死点分析方法之一——分数有效剂量（Fractional effective dose， FED）分析得到的有效疏散时间存在显著差异。
: In this study, with variables the cross section area (97 m 2 , 58 m 2 , 38 m 2 ) and the wind velocity(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 m/s), the time of getting off train dependent on the way of itself and the width of the evacuation route was analyzed, and also fire and evacuation characteristics is reviewed by cross section area of each wind velocity. As the result, if cross section become smaller, the density of harmful gases in the tunnel increased more than the ratio of decreasing cross section area. In the case of small cross sectional area, the surrounding environment from initial fire is indicated to exceed the limit criteria suggested in performance based design. In the analysis of effective evacuation time for evacuation characteristics, the effective evacuation time was the shortest in the case of evaluating effective evacuation time by the visibility. Also, there was significant difference between the effective evacuation time on the basis of performance based evaluation and the effective evacuation time obtained by analyzing FED (Fractional effective dose), one of the analysis method obtaining the point that deaths occur, against harmful gases.