Emergency evacuation from multi-exits rooms in the presence of obstacles

Chen, Liang; Zheng, Qiang; Li, Kun; Li, Qiao-Ru; Zhang, Jianlei

doi:10.1088/1402-4896/ac119a

Cited by 10 publications

(7 citation statements)

References 41 publications

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“…The past two decades have witnessed the great achievement of social dynamics on exploring the fundamental mechanism of collective behaviors [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. Emergency evacuation, as a typical example of social dynamics, is an active and attractive field of urban traffic research [56][57][58]. In fact, evacuation usually occurs in complicated configuration with multi-rooms and multiexits [57].…”

Section: Conclusion -mentioning

confidence: 99%

“…Emergency evacuation, as a typical example of social dynamics, is an active and attractive field of urban traffic research [56][57][58]. In fact, evacuation usually occurs in complicated configuration with multi-rooms and multiexits [57]. Therein pedestrians consider not only how far to each exit (the "distance factor"), but also how many other pedestrians are gathering near each exit (the "density factor").…”

Section: Conclusion -mentioning

confidence: 99%

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Influence of pedestrian psychology on evacuation dynamics with the guide of emergency signage

Jiang¹,

Zhou²,

Zhang³

et al. 2022

EPL

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How to simulate the true pedestrian psychology who face emergency is an important issue that decides evacuation efficiency. Pedestrian psychology during the evacuation process is complex, abstract and difficult to quantify directly. Based on the typical social force model, this paper improves the pedestrian direction selection procedure and introduces “weight factor” to adjust the degree of contribution of “the density factor” and “the distance factor” to pedestrians’ choice of moving direction. In this model, pedestrians can not only roughly estimate the distance between themselves and each exit, but also judge the degree of crowd gathering near each exit by virtue of the electronic display screen in the center of the cross aisle. Simulation results show that, for configuration with multi-rooms and multi-exits, when the pedestrian number reaches a certain level, only considering the distance factor will lead to uneven distribution of the crowd, therefore inducing obvious congestion. On the other hand, concentrating too much on the density factor make pedestrians hesitate to choose the appropriate exit. In conclusion, we should comprehensively consider the impact of the “density factor”and the “distance factor”, which helps to provide feasible evacuation strategies for emergency situations and to improve both evacuation efficiency and exit utilization.

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Section: Conclusion -mentioning

confidence: 99%

Section: Conclusion -mentioning

confidence: 99%

Influence of pedestrian psychology on evacuation dynamics with the guide of emergency signage

Jiang¹,

Zhou²,

Zhang³

et al. 2022

EPL

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show abstract

“…As the distance between two adjacent evacuation doors increases (within the range of less than two body widths), the evacuation efficiency of the crowd decreases [19,20]. Further research by scholars has shown that both excessive and insufficient distances are not conducive to evacuation [21]. Under unchanged exit conditions, evenly utilizing all exits is a general approach to enhancing the overall evacuation efficiency of the building [22,23].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Impacts of Exit Structures on Evacuation Efficiency

Wei,

Lou,

Song

et al. 2023

Fire

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In the context of a fire emergency, safe and efficient exits are of paramount importance for pedestrian evacuation. The recent rapid development in the construction industry has rendered exit structures more diverse and complex. However, little attention has been paid to the influence of exit structures on the efficiency of crowd evacuation processes. In this paper, a tentative experiment was designed to preliminarily reveal the effects of five exit structures (Exit 1, Exit 2, Exit 4, Exit 5, and Exit 3 as examples for comparison) on crowd evacuation. Exit 1 has door leaves opening outward. Exit 2 has door leaves opening inward. Exit 3 has no leaves. Exit 4 consists of double-layer exit doors with the doors opening outward. Exit 5 comprises double-layer exit doors with the doors opening both sides outwards Subsequently, according to the properties of this experiment, a social force-based simulation model was established using the AnyLogic software 8.8.4. By changing the exit width and the crowd density, data such as evacuation time, flow rate, crowd density, and time delay were investigated in detail. The results revealed a notable variation in the evacuation efficiency depending on the deign of the exit. The respective flow rates for Exits 1, 2, 3, 4, and 5 were 0.66 people/(m·s), 0.77 people/(m·s), 0.80 people/(m·s), 0.71 people/(m·s), and 0.66 people/(m·s). Although Exit 3 excelled in terms of evacuation efficiency, it is not directly applicable to real architectural structures. Therefore, Exit 2 emerged as a highly promising solution in terms of flow rate and population control in the exit area, underscoring the effectiveness and practicality of its structural design. It is prospective that the results of this study can offer engineering and technical professionals valuable references and guidance concerning the design of exit structures.

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“…Simulation results show that evacuation efficiency sensitively depends on the arrangement of obstacles. 16 The symmetrically placed obstacles are used to change the position of the arch formation in a crowd. Li et al 17 prove that the proper spacing between symmetrically placed obstacles can alleviate congestion and increase evacuation efficiency.…”

Section: Introductionmentioning

confidence: 99%

A fine grid cellular automaton model for pedestrian evacuation considering the effect of an obstacle

et al. 2023

Self Cite

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A cellular automaton (CA) model with a finer discretization of space is proposed to simulate a non-emergency evacuation process in a room with an obstacle. During the evacuation process, a triangle “evading region” phenomenon has been observed through simulation and experiment on the upstream side of the spatial obstacle. In this paper, we use a simple method to generate an obstacle floor field corresponding to the triangle. We investigate the relationship between the pedestrian trajectories and the obstacle’s position. We also study the effect of the obstacle on evacuation time and average evacuation speed. Our study provides insights into the simulation of obstacle avoidance behavior of pedestrians in simple scenarios.

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Emergency evacuation from multi-exits rooms in the presence of obstacles

Cited by 10 publications

References 41 publications

Influence of pedestrian psychology on evacuation dynamics with the guide of emergency signage

Influence of pedestrian psychology on evacuation dynamics with the guide of emergency signage

Exploring the Impacts of Exit Structures on Evacuation Efficiency

A fine grid cellular automaton model for pedestrian evacuation considering the effect of an obstacle

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