Simulation Research On Evacuation Of Public Transportation Hub Under Fire Condition

With the rapid development of urban public transportation construction,there are more and more public transportation hubs.Urban public transportation hubs are an important tool for people to travel,connecting multiple modes of transportation to provide passengers with comfortable and convenient rides.At the same time,as the completion of basic transportation and transfer of people inside and outside the station,the public transportation hub also establishes commercial,entertainment and service centers to provide people with more convenient services.However,the existence of multiple functions in the station also greatly increases the density of the station fire load and the risk of fire,and the probability of accidents is greatly increased.The hazards of fire accidents to personnel are mainly caused by the smoke,radiant heat and toxic substances those are generated by combustion in the building environment.The visibility in the building will be reduced,and it will affect the evacuation of personnel and cause economic losses and casualties.In this paper,we take a transport hub station as the research object and analyse the human behavior during evacuation under fire conditions in that station.Specifically speaking,we analyze the complexity of the plane layout,the fire characteristics and the key influence factors of the fire emergency evacuation in the transport hub station,meanwhile,we introduce the criteria for the human behavior during evacuation,analyze the evacuation width,path and the number of occupants evacuated,confirm the fire cause and size class.Afterwards,a station hall station is used as the fire scenario.We use Pyrosim software to get the danger of a typical fire scene and use the Pathfinder software to obtain the evacuation of the corresponding evacuation scene.The influence of evacuation distance,width of evacuation staircase and other factors on the safety of evacuation is emphatically analyzed.Aimed at the weak link in the evacuation process,the management measures and suggestions for the safe evacuation of personnel in the public transport hub station are put forward.