Study On The Influence Of Exit Conditions On Personnel Evacuation

As a part of the space structure,the exit conditions of buildings also directly affect the evacuation path,moving distance and time.In order to systematically and comprehensively analyze the impact of exit conditions on personnel evacuation,the article mainly takes the opening angle of the door leaf,which is the most easily ignored by people,as the research object,establishes evacuation models under different situations for research,explores the evacuation rules under the action of the opening angle of the door leaf and various influencing factors,and provides relevant reference for personnel evacuation.On the one hand,the TOGAWA rapid evacuation model was improved,the flow rate correction coefficient was introduced into the improved evacuation model,and the impact of personnel density on the evacuation speed was considered.The Pathfinder software was used to establish a single room evacuation model,and the improved evacuation model was simulated.It was found that the improved model was consistent with the software simulation results,And by comparing the impact of different opening angles on evacuation when the door leaves are opened inwards and outwards,it is found that although the evacuation efficiency is gradually improved with the increase of the opening angle under the two opening directions,the evacuation efficiency is greatly affected by the opening angle when the door leaves are opened inwards.On the other hand,in order to systematically study the exit conditions in many aspects,we use Massmotion software to establish an evacuation model for the whole floor of the university teaching building.From the perspective of single,double and multiple factors,we explore the evacuation law under the interaction of the door leaf opening angle and multiple factors such as installation mode,installation location,passage width,number of scattered people and opening state,and analyze its impact on personnel evacuation.When only the installation mode is considered,it is found that the evacuation efficiency is the fastest under mode 3,and the evacuation time decreases gradually with the change of the door leaf opening angle.When considering the influence of two factors,with the increase of the relative distance between the door leaf installation positions,the increase of the passage width and the decrease of the number of evacuees,the overall evacuation rate under the three installation modes is gradually increasing.Especially under the influence of multiple factors,the increase of opening angle,relative distance and passage width is particularly significant for the improvement of evacuation efficiency.In addition,under the same opening angle,the door leaf opening state in Mode 1 has the greatest impact on evacuation.