CAJ | 학술논문

通过场模拟软件FDS模拟了高层建筑火灾的烟气运动过程，根据模拟所得烟气中CO浓度、温度和烟气层高度的变化情况分析了自然排烟效果的影响因素：火灾功率、起火房间位置、外窗尺寸和走廊尺寸。分析发现：火灾功率越大，危险性越大，自然排烟效果越差，进行消防设计时必须考虑到可能发生的大功率火灾，准备必要的消防设施；火源位于走廊中部房间较位于走廊一端时，建筑内水平方向各区域及室内外质能交换加快，利于提高自然排烟效果；增大外窗高度可明显改善外窗自然排烟效果；走廊长度的缩短会使排烟效果得到整体提高，而走廊长度较大时，自然排烟只能作为辅助排烟设施。
통과장모의연건FDS모의료고층건축화재적연기운동과정，근거모의소득연기중CO농도、온도화연기층고도적변화정황분석료자연배연효과적영향인소：화재공솔、기화방간위치、외창척촌화주랑척촌。분석발현：화재공솔월대，위험성월대，자연배연효과월차，진행소방설계시필수고필도가능발생적대공솔화재，준비필요적소방설시；화원위우주랑중부방간교위우주랑일단시，건축내수평방향각구역급실내외질능교환가쾌，리우제고자연배연효과；증대외창고도가명현개선외창자연배연효과；주랑장도적축단회사배연효과득도정체제고，이주랑장도교대시，자연배연지능작위보조배연설시。
Numerical model was established with field model FDS and smoke movement was simulated in high-rise building fire in this paper.Based on simulated results of CO concentration, smoke temperature and layer height,the factors influencing effect of natural smoke exhaust were analyzed,which are fire pow-er,the location of the room on fire,the size of the external windows and the corridor.The analysis indica-ted that:the higher the fire power,the greater the fire risk,the poorer the effect of natural smoke exhaust became ,so we should prepare necessary fire fighting facilities considering high power fire in fire protection design.When the fire was located at the middle room instead of one end of the corridor,it accelerated mass-energy transfer between areas in horizontal direction of the building and indoor and outdoor,which improved the effect of smoke exhaust.Effect of natural smoke exhaust was improved obviously when the height of windows was increased.Shorter corridor made natural smoke exhaust more effective from the global aspect.Natural smoke exhaust was more effective as auxiliary facilities when corridor is much lon-ger in high-rise building.