| INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Pedestrian flow through exit: Study focused on evacuation pattern |
| Bo-Si Zhang(张博思), Zhi-Hong Yu(余志红)†, Bo-Lin Sun(孙柏林), Zi-Yu Guo(郭紫钰), and Mo Chen(陈默) |
| School of Safety Engineering, China University of Labor Relations, Beijing 100048, China |
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Abstract Experiments are conducted on the evacuation rate of pedestrians through exits with queued evacuation pattern and random evacuation pattern. The experimental results show that the flow rate of pedestrians is larger with the random evacuation pattern than with the queued evacuation pattern. Therefore, the exit width calculated based on the minimum evacuation clear width for every 100 persons, which is on the assumption that the pedestrians pass through the exit in one queue or several queues, is conservative. The number of people crossing the exit simultaneously is greater in the random evacuation experiments than in the queued evacuation experiments, and the time interval between the front row and rear row of people is shortened in large-exit conditions when pedestrians evacuate randomly. The difference between the flow rate with a queued evacuation pattern and the flow rate with a random evacuation pattern is related to the surplus width of the exit, which is greater than the total width of all accommodated people streams. Two dimensionless quantities are defined to explore this relationship. It is found that the difference in flow rate between the two evacuation patterns is stable at a low level when the surplus width of the exit is no more than 45% of the width of a single pedestrian stream. There is a great difference between the flow rate with the queued evacuation pattern and the flow rate with the random evacuation pattern in a scenario with a larger surplus width of the exit. Meanwhile, the pedestrians crowd extraordinarily at the exit in these conditions as well, since the number of pedestrians who want to evacuate through exit simultaneously greatly exceeds the accommodated level. Therefore, the surplus width of exit should be limited especially in the narrow exit condition, and the relationship between the two dimensionless quantities mentioned above could provide the basis to some extent.
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Received: 06 June 2023
Revised: 20 August 2023
Accepted manuscript online: 29 August 2023
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PACS:
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89.40.-a
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(Transportation)
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28.52.Nh
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(Safety)
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07.05.Fb
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(Design of experiments)
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88.40.M-
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(Residential and commercial buildings)
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| Fund: Project supported by the Special Funds for Basic Operating Expenses of the Centre University of China (Grant No. 23ZYJS006). |
Corresponding Authors:
Zhi-Hong Yu
E-mail: yuzhihong2003@126.com
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Cite this article:
Bo-Si Zhang(张博思), Zhi-Hong Yu(余志红), Bo-Lin Sun(孙柏林), Zi-Yu Guo(郭紫钰), and Mo Chen(陈默) Pedestrian flow through exit: Study focused on evacuation pattern 2024 Chin. Phys. B 33 018902
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