中文摘要：

由于地铁客流量大，一旦发生火灾极易造成人员伤亡．地铁各车站结构的差异及火灾发生地点和规模的不确定性使得人们对依据处方式规范设计的防排烟系统在火灾中能否有效地运行产生了疑问．本文以北京某地铁站为例，通过性能化分析的手段对可能的火灾场景及防排烟方案下车站火灾环境的危险性进行了评估，在此基础上确定了不同火灾场景下防排烟系统优化运行方案，并对不满足火灾安全要求的烟控方案提出了改进意见．本文的研究结果可为实际烟气控制系统的优化运行提供参考．

英文摘要：

Due to the large daily passenger flow in subway systems, the fire might cause a great deal of life losses once the fire protection system is not working effectively. Whether the smoke control system which designed following the prescriptive codes can work effectively in real fire cases is doubtful because of the complex structure of the subway system and uncertainties of the fire. Fire hazard assessment based on performance-based analysis would be necessary. Fire hazard assessment for one Beijing subway station under different smoke control strategies and fire scenarios would be carried out in this paper, the optimal smoke control strategies would be determined, and some improved suggestions would be provided for the poor systems. The results would be useful for the smoke control system operation in practice.