A Study On Staircase Personnel Considering Evacuation Efficiency And Safety Under Normal And Epidemic Conditions

As the economy grows,building types are gradually becoming more complex and high-rise to accommodate more people and meet the demands of daily life,and for this reason elevators and escalators are being used extensively.However,in the immediate aftermath of the epidemic,it is important to consider the safety of people while improving evacuation efficiency.Therefore,this paper focuses on software simulation of three evacuation methods:delayed evacuation,interval evacuation and integrated evacuation.By changing the density of evacuees and floor height,we analyze both the evacuation efficiency and the safety of people on the stairs,aiming to provide new evacuation methods to reduce evacuation time while ensuring the safety of people in the stairwell.The main research contents and results are as follows:(1)Evacuation mode selection and model setting.Based on the basic social force model,three evacuation methods are selected:interval evacuation,delayed evacuation and comprehensive evacuation,and the simulation of personnel evacuation in different ways is carried out on two models without and with barrier respectively,and finally compared with free evacuation,and analyzed from two aspects of evacuation efficiency and stairwell personnel density,which can provide a theoretical basis for analyzing the evacuation process of stairway personnel.(2)Evacuation simulation studies were conducted on floors without barriers.The simulation results show that:when studying evacuation efficiency,delayed evacuation at low floors has the highest efficiency,comprehensive evacuation at medium height floors can improve personnel evacuation efficiency,and delayed evacuation can improve evacuation efficiency when evacuation personnel density is less than 0.5 per/m~2at high floors;when studying personnel evacuation safety,interval evacuation has the highest safety;when considering evacuation efficiency and personnel safety at the same time When the density of evacuees is less than 0.5 per/m~2,delayed evacuation is suitable for evacuation of middle and high floors,and delayed evacuation for high floors can take both into account.(3)Evacuation simulation studies were conducted on floors with barriers.The simulation results show that:when considering evacuation efficiency,delayed evacuation for low floors can increase evacuation efficiency,and when evacuation personnel density is less than 0.5per/m~2,delayed evacuation for high floors can increase evacuation efficiency;when considering personnel safety,both low floors and high floors should give priority to interval evacuation,and interval evacuation on the ground floor can reduce personnel density when evacuation personnel density is less than 0.775 per When evacuating at intervals on the ground floor,the density of evacuees is less than 0.775 per/m~2,and when evacuating at intervals on the high floor,the density of evacuees is less than 0.5 per/m~2,the density of stairwell personnel can be reduced;under the condition that the density of floors and evacuees is low,evacuating at intervals can improve the evacuation efficiency and reduce the density of stairwell personnel at the same time.