The Performance-based Fire Safety Design And Application Of Comprehensive Transportation Hub Construction

With the development of society,the demand for transportation is getting higher and higher,and the transportation hub that can meet people's comprehensive needs for commuting can be constantly developed.Large transport hub construction in structure selection,material application,space allocation,functional use,smoke control and extraction system and supporting facilities are very different with traditional architecture,the design code for building this kind of can according to the provisions,but on the basis of fire performance-based design of successful cases received both at home and abroad.Therefore,how to satisfy the use function of large traffic junction and guarantee its fire safety performance is a key point of the current research on fire control performance design.In this paper,on the basis of related literature at home and abroad,the theoretical basis and application of fire performance-based design at home and abroad present situation carries on the analysis,a large-scale high-speed line in guangdong station fire performance-based design as an example,the comprehensive application of relevant principle of fire protection engineering,the scientific analysis to determine the building evacuation Numbers,hazards,determine the fire load,on the basis of defining the building fire control facilities set up 10 fire scenario,using FDS software and personnel evacuation Pathfinder geometric model is set up,by means of fire smoke,temperature,and visibility,to simulate the thermal radiation intensity The evacuation situation under the corresponding conditions was obtained,the analysis results were compared with the judgment criteria,the fire performance design safety of the building is judged..The simulation results show that the CO,visibility and temperature of each fire setting point have obvious changes after the fire.Where,the CO did not show a situation higher than 500 ppm at all places below 2.1m,and did not reach the dangerous concentration,and the change was not obvious.With the development of visibility over time,the visibility of scenes 1-3 at 726 s after the fire and scenes 1-4 at 750 s after the fire started to appear in some areas at a level of 2.1m below 10 m.The visibility at other set points within 1200 s after the fire and on the plane with a height of 2.1m was not less than 10 m except over the fire source.Temperature distribution in addition to rapid temperature rise above the fire source,temperature throughout the rest of the impact is not big,and there is no higher than 60 ?.The results of evacuation simulation show that the time(RSET)required for evacuation to the safety zone is less than the time of fire hazard(ASET),the safety of personnel evacuation is guaranteed.Analyses the factors influencing the evacuation of the conclusion: the application cases although has big space to each other,headroom,the characteristics of the crowded,and there are too much fire partition,smoke facilities to decorate,evacuation distance beyond the special fire problems,such as the current specification requirements,but targeted through the use of fire performance-based design method,the building fire safety goals can be achieved.The study in this paper has a practical reference value for the design and application of fire control performance in large traffic hub buildings and a reference value for the safety of fire control in high buildings.