Case-study On A Large Bookstore On Performance-based Fire Engineering Approach

The fire design for a large building of saling books is always a very important research subject. Because of the large scale, high space,high hazard of fire and particular construction of these buildings, their fire-protection designs, including fire compartmentation, safety evacuation, smoke control, construction protection and positive fire-protection device and etc.,put forward a challenge to the traditional'prescriptive'fire-protection design codes. This article introduced the application of performance-based fire-protection design approaches in a large building of saling books based on analyzing their fire characteristics.Combined with working practice, this article took a large books-store building in BeiJing as an example of a large building of saling books and made a performance-based fire-protection study on its fire design. Based on setting up the fire safety goals, performance criterion, fire scenario and uncertainty factor, this article simulated the occupants'evacuation time, smoke spread, radiation flow etc and determined fire detector and automatic extinguishing device by using the developed engineering method. And so these buildings'fire safety goals, which have the equivalent safety level with the existing national standard, can be achieved and those problems, which caused by some incompliment requirements or the existing codes not adapting to the practical need, can be solved.With analyzing of the case study and based on simulating and analyzing quantitatively, this article, considering the goal of the performance-based fire-protection design is protecting occupants from being injured and keeping buildings from being damaged, thought that fire compartmentation of a large building of saling books can be divided according to their saling malls and fire compartmentation in the saling mall can be separated by the fire-proof screen. On the evacuation design, the quantity of safety exits around these buildings and the evacuation width should be increased if possible and the safety exit number, exit width and evacuation distance can be determined according to the simulating results on smoke layer temperature and height, concentration of CO2 and CO, occupants evacuation time and visibility.On the means of preventing and discharging smoke, the most proper measure should be determined according to their geometrical characteristics and the natural means of discharging smoke is feasible to the large building of saling books. Based on analyzing of smoke...