On Application Of Instable Fire To Network Model Of Fire And The Performance-based Design On The Smoke Control System

With the hard work of the predecessor, the application software to calculation on properties of smoke flow in fire building has been open out. Compared with the Japanese data, the simulation data are very close, and the exploitation of the application software is successful. But the application software also has some problems, limitations and bugs. Under the gain fruits, this paper's author does some improvement, and the application software becomes more consummate and more applicable. Shown like the follow:(1) Improve on fire model of the prophase application softwareThe prophase application software adopting the steady fire, steady subsection fire or linear segmentation fire exists limitation. Some instable fire include t2 fire, MRFC fire and FFB fire are added to the application software for calculation on the properties of the fire smoke flow in building. By a comparison, it has been proved that the calculation curve track is more smoothness and the work to input has become some easy. The improved application software is successful.(2) Improve on mechanical smoke extraction of the prophase application softwareThe optimum smoke extraction volume is smoke extraction volume equal to smoke produce volume in the prophase application software. In actually, immixture volume air in smoke extraction process. So that smoke extraction volume equal to smoke produce volume can't assure safety evacuation. The author put forward that the optimum smoke extraction volume is that the target of the smoke temperature and density is controlled under the critical confine of person's safety.Improve on mechanical smoke extraction of the prophase application software. Setup smoke extraction volume and input to software. Smoke flow properties of corridor building was Simulated of the conditions of different smoke extraction volume. Comparing the optimum smoke extraction volume of the conditions of different fire intensities, the results show that the simulation data is tally to the experiment result of Si Chuan Fire Protection Scientific Research Department. The simulation data is not equation to the fire safety code.(3) By a comparison with the software and safe evacuation, safe analysis has been done respectively under the conditions of physical smoke extraction and mechanical smoke extraction. Contrasting analytic results, the definition of the optimum smoke extraction...