The Simulation Analysis Of Evacuation Passenger Traffic State In The Subway Sation Under The Condition Of Fire

The number of metro passenger flow grows rapidly in China,which means the metro has entered a stage of comprehensive development.However,fires,explosions and other incidents easily disrupt normal operation of metro,especially in some subway stations which usually have the following qualities:long and narrow,closed and twist,poor ventilation and lighting,and crowded.With these qualities,pedestrian evacuation is difficult.As a result,it most likely will cause huge economic losses and casualties.Therefore,in order to maintain the subway operation safety,in view of the characteristics of fire accident and the influence of the pedestrian evacuation,research on the evacuation passenger traffic states in the subway station under the condition of fire can provide the basis for the design of the layout and contingency plans.Based on this purpose,the paper,from the perspective of the research status at home and abroad,analyzes the influence factors of the emergency evacuation of pedestrians under the condition of fire.Besides,this paper mainly studies the relationship between pedestrian panic degree and the evacuation speed.Fire evacuation model is established based on Anylogic,and the paper analyzes evacuation passenger traffic state in subway stations under the condition of fire,and dynamically identifies the network bottlenecks of evacuation in the subway station.Main work includes:(1)In order to accurately grasp the regularity and characteristics of pedestrian behaviors under the condition of fire,the paper draws lessons from four elements of disaster accident model,and deeply insight into the influence factors of pedestrian emergency evacuation in the subway stations from the people,objects,environment and management four aspects.(2)The paper improves the existing quantitative model of pedestrian panic degree,combining with the questionnaire survey datum and psychological behavior factors to build the quantitative model of relationship between the pedestrian panic degree and evacuation speed,and furtherly joins fire smoke impact on emergency evacuation speed of the pedestrian.As a result,it will comprehensively get quantitative relationship between various influential factors and the evacuation speed under the fire.(3)The paper defines the evacuation passenger traffic status in subway stations,establishes the evacuation passenger traffic status hierarchy index of different evacuation facilities department,and puts forward fire dynamic bottleneck identification index.(4)Taking the Chengdu metro line 5,south lake interchange station as an example,using the emergency evacuation model based on Anylogic pedestrian simulation software,combine with pedestrian panic psychology and fire smoke's impact on the emergency evacuation speed,analyze the evacuation passenger traffic state at different facilities department,and consider the bottleneck identification method proposed in this paper,it is concluded that the bottleneck of the emergency evacuation of the subway station are escalators,brake machines and part of the channels,and analyses the reasons of the bottlenecks,as well as putting forward the corresponding policies to redistribute.