Research On Numerical Simulation Of Internet Cafe Fire And Safety Evacuation Of Personnel

At present,the domestic Internet cafe industry is developing very rapidly.After crossing the budding period and the development period,it gradually enters the mature period,followed by the problem of building fire caused by the rapid development.Because the Internet cafe building is different from the traditional Internet cafe in the lobby.The internal structure is mostly divided into room-type and regional-type design,and there are many fire hazards and more serious consequences after a fire occurs,which has attracted wider social attention.This paper studies the fire problem of emerging Internet cafe buildings.Combined with the example of an Internet cafe in Zhengzhou City,Henan Province,the numerical simulation of fire and personnel evacuation simulation are carried out on this type of building,and the law of smoke spread and personnel evacuation are analyzed to provide information for future Internet cafes.It provides a basis for the fire protection design of similar buildings and the judgment of building fire performance,and provides a way of thinking for the study of safe evacuation of such buildings.In this paper,the fire research of Internet cafes is first to study the characteristics of Internet cafes fires,including the characteristics of fire spread,fire design,fire parameter settings and other related theories.Then,combined with the example Internet cafe,use Pyrosim to build a fire simulation model,and at the same time use the Gustav semi-quantitative evaluation method to evaluate the example Internet cafe,compare the dangers of each area and select the appropriate area to design the fire scene,analyze and analyze the fire scene.Summarized the law of smoke spread in Internet cafes under the conditions of normal operation and failure of mechanical smoke exhaust in working conditions of different fire source positions,and obtained the time available for personnel evacuation in each scenario by simulation calculation;use Pathfinder software to establish an example Internet cafe personnel evacuation.The model simulates the evacuation behavior of people in the building,analyzes the evacuation laws of personnel,and summarizes the evacuation utilization rate of each staircase.At the same time,it calculates the necessary safe evacuation time of people in each fire scene.Combined with the fire simulation results,the evacuation ability of Internet cafes is judged.Finally,the countermeasures to improve the evacuation efficiency and the rectification suggestions for example Internet cafes are put forward,and the evacuation model of Internet cafe personnel is improved and its feasibility is verified.Through the results of fire numerical simulation and personnel evacuation simulation,it is concluded that the type of Internet cafe fire is non-steady rapid fire;when the fire source is located on a low floor,it is more difficult to evacuate personnel;the impact on the available safe evacuation time for personnel evacuation.The biggest is visibility;in four of the six fire scenarios,the Internet cafe cannot guarantee the evacuation of the internal personnel before the danger comes,indicating that the Internet cafe has certain hidden safety hazards;the mechanical smoke exhaust can effectively discharge the smoke and increase the availability of personnel.Safe evacuation time;planning evacuation routes can improve the evacuation capability of Internet cafes.