Abstract
Traditional methods are using FDS and Pathfinder for numerical simulation of fire evacuation and do not consider the impact of fire products on pedestrians, which will lead to erroneous evacuation results. In order to explore the impact of fire products on pedestrian evacuation when a fire occurs in a building, the pedestrian evacuation risk assessment results are closer to the actual situation. By establishing a full-scale model based on the pedestrian evacuation speed coefficient, a numerical simulation of the evacuation of pedestrians under the influence of fire products is carried out, and the influence of spray intensity and smoke exhaust rate on pedestrian evacuation is analysed at the same time. The results show that, compared with traditional methods, the fire evacuation model based on the evacuation speed coefficient can better reflect the evacuation effect of the real fire scene. At the same time, adding spray and smoke exhaust devices can give pedestrians more time to escape.
Highlights
With the development of computer technology and the indepth study of human behavior and psychology, researchers gradually began to widely use computers to directly simulate the movement state of people in buildings and established a large number of evacuation models. e evacuation efficiency of a fire is affected by many factors, to consider the differences between individuals in the evacuation process, such as cognitive level [1], physiological conditions, mobility, psychological pressure, and other factors [2] impact on the speed of pedestrian evacuation
In order to reduce the error caused by traditional method, make the evacuation result closer to the real scene. erefore, the author intends to use FDS and Pathfinder to conduct simulation research on evacuation of people under the influence of fire products and provide certain guidance for pedestrian evacuation risk assessment of building fires based on the simulation results
Required safe egress time three types of sensors to reach the specified critical hazard value is regarded as Available Safe Egress Time (ASET), in the pedestrian evacuation software Pathfinder; Vc represents the pedestrians to evacuate at a fixed walking speed
Summary
With the development of computer technology and the indepth study of human behavior and psychology, researchers gradually began to widely use computers to directly simulate the movement state of people in buildings and established a large number of evacuation models. e evacuation efficiency of a fire is affected by many factors, to consider the differences between individuals in the evacuation process, such as cognitive level [1], physiological conditions, mobility, psychological pressure, and other factors [2] impact on the speed of pedestrian evacuation. With the development of computer technology and the indepth study of human behavior and psychology, researchers gradually began to widely use computers to directly simulate the movement state of people in buildings and established a large number of evacuation models. By introducing the concept of “total hazard map,” Good simulation of the intelligence of personnel and the role of fire scenes makes the model more reasonable and convenient in determining the escape route of personnel He developed a microscopic discrete evacuation model of personnel behavior based on cellular automata theory [23], so that the individual characteristics of each evacuee can be simulated. Erefore, the author intends to use FDS and Pathfinder to conduct simulation research on evacuation of people under the influence of fire products and provide certain guidance for pedestrian evacuation risk assessment of building fires based on the simulation results In order to reduce the error caused by traditional method, make the evacuation result closer to the real scene. erefore, the author intends to use FDS and Pathfinder to conduct simulation research on evacuation of people under the influence of fire products and provide certain guidance for pedestrian evacuation risk assessment of building fires based on the simulation results
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