Pedestrian evacuation simulation in the presence of an obstacle using self-propelled spherocylinders

Echeverría-Huarte, Iñaki; Zuriguel, Iker; Hidalgo, R. C.

doi:10.1103/physreve.102.012907

Cited by 22 publications

(19 citation statements)

References 36 publications

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“…A similar behavior was reported in Ref. [50], despite that pillar-like obstacles and spherocylinders agents were used.…”

Section: Effects Of the Distance And The Wall Frictionsupporting

confidence: 81%

Improving competitive evacuations with a vestibule structure designed from panel-like obstacles

Sticco,

Frank,

Dorso

2021

Preprint

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It has been shown that placing an obstacle in front of an exit door has proven to be a successful method to improve pedestrian evacuations. In this work, we will focus on the space limited by the exit and the obstacles (i.e. the vestibule structure). We analyzed two different types of vestibules: the twoentry vestibule (which consists of a single panel-like obstacle) and the three-entry vestibule (which consists of two panel-like obstacles). In the former, we studied the effects of varying the walls' friction coefficient κ w and the distance from the obstacle to the exit door d. In the latter, we varied the space between the two panels (gap). We found that the three above mentioned parameters control the vestibule's density, which subsequently affects the evacuation flow (fundamental diagram). We have also found that reducing the distance d or increasing the friction facilitates the formation of blocking clusters at the vestibule entries, and hence, diminishes the density. If the density is too large or too low, the evacuation flow is suboptimal, whereas if the density is around 2 p/m 2 , the flow is maximized. Our most important result is that the density (and therefore the evacuation flow) can be precisely controlled by κ w , d, and the gap. Moreover, the three-entry vestibule produced the highest evacuation flow for specific configurations of the gap and the distance from the panels to the door.

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“…A similar behavior was reported in Ref. [50], despite that pillar-like obstacles and spherocylinders agents were used.…”

Section: Effects Of the Distance And The Wall Frictionsupporting

confidence: 81%

Improving competitive evacuations with a vestibule structure designed from panel-like obstacles

Sticco,

Frank,

Dorso

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The term “obstacle effect” describes the observation that under emergency evacuation conditions, the transportation at the bottleneck can be counterintuitively increased by a suitably placed obstacle near the exit. Many researchers have explored this topic using both simulation 15 , 16 and empirical 17 , 18 methods regarding, to name a few, the effect of obstacle size and position 19 , 20 , and the effect of corner exit rather than middle exit 21 , 22 . However, the obstacle and corner exit effects are applied to emergency escape conditions where the clogging results from the extremely small distance between individuals.…”

Section: Discussionmentioning

confidence: 99%

A novel social distance model reveals the sidewall effect at bottlenecks

Fang

2021

Sci Rep

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Intermittent and periodic outbreaks of infectious diseases have had profound and lasting effects on societies throughout human history. During the global spread of SARS-CoV-2 and the resulting coronavirus disease (COVID-19), social distance has been imposed worldwide to limit the spread of the virus. An additional deliberate intention of keeping a minimum safety distance from neighbors can fundamentally alter the “social force” between individuals. Here, we introduce a new “social distance” term inspired by gas molecular dynamics and integrate it into an existing agent-based social force model to describe the dynamics of crowds under social-distanced conditions. The advantage of this “social distance” term over the simple increasing of the repulsive range of other alternatives is that the fundamental crowd properties are precisely described by our model parameters. We compare the new model with the Helbing and Molnar’s classical model and experimental data, and show that this new model is superior in reproducing experimental data. We demonstrate the usability of this model with a bottleneck motion base case. The new model shows that the bottleneck effect can be significantly alleviated through small wall modifications. Lastly, we explain the mechanism of this improvement and conclude that this improvement is due to spatial asymmetry.

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“…The SFM also points out that pedestrian movement is induced not only by people's desire to reach a certain destination, but also by some other environmental factors. In order to describe more realistic scenarios, extended social force models have received increasing attention in recent years [29][30][31]. However, compared to the outflow process, the inflow process has been rarely investigated using modelling method.…”

Section: Introductionmentioning

confidence: 99%

Microscopic Characteristics and Modelling of Pedestrian Inflow Process with Inactive Persons

2022

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Inflow and outflow processes are common phenomena in daily life. Many types of research have been conducted to study the features of the outflow process, especially in scenarios with a single room or a straight corridor. A few scholars have paid attention to the movement characteristics of pedestrian inflow. Further explorations are still under great demand. In this contribution, a set of pre-conducted experiments are used to analyze the characteristics of the pedestrian inflow process with inactive persons. In these experiments, inactive persons were required to randomly cease within the room, leading to intensive detour behavior of pedestrians. The characteristics are carefully investigated using gradient analysis and curl analysis. To mimic the aforementioned inflow process, static global field is constructed to heuristically navigate a social force based microscopic model. The proposed model can reproduce the self-organized phenomena in the experiments. Our work can help understand the field feature of the pedestrian inflow process with inactive persons. High chaos level areas can be marked out providing practical information for managers.

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Pedestrian evacuation simulation in the presence of an obstacle using self-propelled spherocylinders

Cited by 22 publications

References 36 publications

Improving competitive evacuations with a vestibule structure designed from panel-like obstacles

Improving competitive evacuations with a vestibule structure designed from panel-like obstacles

A novel social distance model reveals the sidewall effect at bottlenecks

Microscopic Characteristics and Modelling of Pedestrian Inflow Process with Inactive Persons

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