Experimental Study On The Evacuation Behavior Wih Obstacle

With the development of the society,more and more complex structures are built.When there are obstacles in room,the evacuation will be different with the ordinary cases of evacuation.Therefore,the evacuation experiment of the room with obstacles to discuss the characteristics of the evacuation.Reasonable analysis and evaluation for evacuation in public places,which provide effective evacuation plan for site designers have important practical significance.In this paper,on the basis of summarizing predecessors’ evacuation dynamics research,with the different width and the different distance between the export and the obstacle,we discuss the evacuation time,export flow coefficient,density and flow velocity.The experimental study of the system is mainly got the following results:(1)By carry out the different width and the different distance between the export and the obstacle under the condition of single exit evacuation experiment,near the export under the condition of existing obstacles,the evacuation time is the minimum when the distance between the obstacles and export 1.0m,and generally have beneficial effects.With the increase of outlet width,evacuation time reduced,evacuation efficiency compared to the last exit width increased by 29.08%,14.21%,21.33%and 5.26%.(2)By double factors such as repeat test analysis of variance,under the condition of the significance level of 0.05,factor A(obstruction and export distance)has significant influence on the result of the experiment.Export factor B(width)is have a significant effect on the experimental results;Factor A and B interaction effect is not significant.(3)Through the numerical simulation of large size under the different width and the different distance between the export and the obstacle under the condition of single export evacuation,as same as the experiment result,when the distance between the obstacles and exit of 1.0 m,the promotion of evacuation is the strongest;Different from the experimental results,when the distance between obstacles and exit is 0.8 m,the evacuation time is the longest.(4)With the increase of outlet width,evacuation time gradually decrease and eventually reach the critical width,the evacuation time there will be no significant change.Through the comparison with no obstacle evacuation,the presence of obstacles can not only reduce the evacuation time,also can narrow evacuate critical width.