文档介绍：大空间火灾烟气扩散流动规律及防排烟方式研究
摘要
随着社会经济的飞速发展和建筑科技的长足进步,具有新的设计概念和结构形式的大空间建筑不断涌现,成为城市建设与发展的特色标志。然而,一些具有大空间的大型公共建筑较为广泛地采用新结构、新工艺、新材料,使大型公共建筑消防安全成为世界各国消防的重点和难点之一。
本文首先介绍了大空间建筑的结构特点以及大空间建筑的火灾特点,以展览馆为例,详细分析了大空间火灾烟气流动规律及影响因素,在对目前大空间建筑再防排烟方面存在的困难和问题,如:防火分区难以满足规范要求,烟气运动较为复杂,控制比较困难,常规的自动消防设施难以发挥作用,钢结构耐火性能差等问题进行了详细分析的基础上,提出了把大空间划分为单独的防火分区,在大空间的中下部安装感烟、感温以及火焰探测器,对大空间钢结构的耐火极限进行保护等相应的解决对策,为大空间建筑防排烟工程的设计,灭火救援提供一定的理论依据和技术支持。
关键词大空间; 烟气流动; 防排烟
Study on the Low of Smoke Movement
and Smoke Control in Large Space
Abstract
With the rapid development of social economy and the great advancement of architectural science and technology, public buildings with new designing concepts and structures spring up and e the characteristic symbol of city construction and development. However, some mega-structures are widely adopted the latest structures, technology and materials, which makes the fire control safety of large public buildings e one of the most important and difficult things among the fire service all over the world.
This article introduces the structural characteristics and fire features of the large space buildings. To the exhibition hall as an example, the articled detailed analysis the rules of fire smoke flowing and the impact of factors in a large space fire. Based on detailed analysis of current difficulties and problems in smoke-controlling of large space buildings such as: fire district can’t meet the regulatory requirements, smoke movement es plex and more difficult to control, the conventional automatic equipment finds it hard to play a role in the fire safety facilities, the fire-resistance of the steel is poor, the e up with some solutions of dividing large space into separate fire district, installing smoke, temperature, and flame detectors in the lower part of a large space, protecting the fireproof limit of the large space steel structure, providing certain the basis of theory and the technical supporting to the design of the large space smoke-controlling and fire-fight