基于BIM模型与FDS的老旧活动中心火灾数值模拟

Fire simulation of old activity center based on BIM model and FDS

为探究火灾发生时CO浓度、能见度、火场温度等火灾参数的时变特性.以某老旧活动中心为例,通过Revit软件构筑该建筑物理模型,利用火灾动力学(Fire Dynamics Simulator,FDS)软件Pyrosim对3种火灾工况开展数值模拟计算.研究结果表明:窗户开启比窗户关闭在火灾CO浓度、能见度、温度到达临界时间至少分别降低41.3%、11.8%、16.3%;打开楼梯间附近窗户比打开火源处窗户能有效降低危害,该研究成果可为后续火情预防应急管理提供相应的防范措施及对策建议.

In order to explore the time-varying characteristics of fire parameters such as Carbon Monoxide(CO) concentration,visibility,and fire temperature when a fire occurs,in the report,an old activity center was used as an example,Revit software was used to construct the building physical model,and the Fire Dynamics Simulator(FDS) software Pyrosim was used for the numerical simulation calculation of the three fire conditions.The results showed that under fire conditions,the time for reaching the critical value of the fire CO concentration,visibility,and temperature under closed window conditions are shorter than that under the opened window conditions with 41.3%,11.8%,and 16.3%,respectively.Compared with opening a window at the fire source,opening a window near the stairwell can effectively reduce the harm.Our data can provide corresponding preventive measures and countermeasures for subsequent fire prevention and emergency management.