半开敞型商业中庭排烟系统研究

发布时间：2018-01-12 06:27

本文关键词：半开敞型商业中庭排烟系统研究　出处：《北京工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：大型建筑内部中庭为以上下楼层贯通的大空间作为核心而创造的建筑空间,其屋顶或外墙采用钢结构和玻璃制成,以达到建筑通透效果。其火灾情况下烟气易积聚并扩散蔓延至其他区域。为了降低火灾风险同时维护人员生命安全,合理有效的防火分隔和排烟设计具有重要意义。本文以大型商业建筑半开敞的连通公共中庭为研究对象,以某综合商业项目为实例,结合项目建筑特点,提出了机械排烟与自然通风相结合的设计方案。针对建筑中步行街及其内部中庭组成的半开敞连通高大空间,采用火灾动力学数值模拟软件FDS,分析研究火灾时不同排烟设计方案的有效性,从而选取出适宜的排烟方案。结果表明,机械排烟与自然通风相结合的排烟方案在最不利火灾场景下可达到最优的排烟效果,在该排烟模式下热烟气层的下降不会影响中庭及中庭顶部步行街区域的人员疏散安全,各项参数如温度、能见度等均在人体可承受范围内。同时在推荐方案基础上,对影响建筑排烟效果的补风条件、室内温度、室外风等一些主要因素逐一进行了论述与分析。结果表明中庭底部采用自然补风、设置高环境温度、室内温度分层和受室外风向影响时,所推荐的排烟策略可为人员疏散提供一定安全保障。通过对于上述影响因素的分析和判断,提出了相关设计建议,亦可作为同类商业中庭设计的参考。
[Abstract]:The inner atrium of a large building is a building space created with a large space through the upper and lower floors, the roof or exterior wall of which is made of steel and glass. In order to achieve the effect of building penetration, the smoke is easy to accumulate and spread to other areas in case of fire. In order to reduce the risk of fire and maintain the safety of personnel. Reasonable and effective fire prevention separation and smoke exhaust design is of great significance. This paper takes the semi-open public atrium of large-scale commercial buildings as the research object, taking a comprehensive commercial project as an example, combining the characteristics of the project building. The design scheme of combining mechanical smoke exhaust and natural ventilation is put forward. The fire dynamics numerical simulation software FDS is adopted in view of the semi-open connected large space composed of the pedestrian street and its inner atrium in the building. The effectiveness of different smoke exhaust schemes is analyzed and studied, and the appropriate smoke exhaust scheme is selected. The results show that. The combination of mechanical smoke exhaust and natural ventilation can achieve the optimal smoke exhaust effect in the most adverse fire scenarios. In this smoke exhaust mode, the decrease of hot smoke layer will not affect the evacuation safety of atrium and atrium top pedestrian street area, such as temperature. Visibility is within the range of the human body. At the same time, on the basis of the recommended scheme, on the basis of the building smoke exhaust effect of the wind conditions, indoor temperature. Some main factors, such as outdoor wind, are discussed and analyzed one by one. The results show that natural supplementary wind is used in the bottom of atrium, high ambient temperature is set, indoor temperature is stratified and affected by outdoor wind direction. The recommended smoke exhaust strategy can provide a certain safety guarantee for evacuation. Through the analysis and judgment of the above factors, the relevant design suggestions are put forward, which can also be used as a reference for the similar commercial atrium design.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU834

【相似文献】