In order to study the influence of pedestrian backtracking behavior on evacuation,considering the combined effect of the attraction of multiple exits to pedestrian,the interaction of personnel,the threat of fire spread and the attraction of back-tracking field,a floor field model of pedestrian evacuation under the combined action of static field,dynamic field,fire source field and backtracking field was proposed based on the cellular automata model.The influence of backtracking behavior on evacuation process under different backtracking proportions,backtracking areas,personnel densities,exit quantities and loca-tions was studied.The results show that a small amount of backtracking behavior has little effect on the total evacuation time,while the existence of group backtracking behavior increases the overall evacuation time.With the increase of backtracking proportion,the evacuation time also increases.The closer the backtracking area is to the exit,the smaller the influence on the overall evacuation efficiency.The effect of backtracking behavior on evacuation process strengthens continually with the in-crease of personnel density.Under the condition of dual exits,setting the exits on opposite sides can effectively reduce the negative influence of backtracking behavior on the evacuation process.The research results can provide reference for impro-ving the evacuation efficiency in emergency.
cellular automatabacktracking behaviorpersonnel evacuationfloor field modelevacuation efficiency
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