Simulation of the influence of spatial obstacles on evacuation pedestrian flow in walking facilities

Hao, Yue; Zhang, Junyao; Chen, Wenxin; Wu, Xinsen; Zhang, Xu; Shao, Chunfu

doi:10.1016/j.physa.2021.125844

Cited by 16 publications

(1 citation statement)

References 36 publications

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“…These researches include focuses on the bottlenecks, [6] the stairways, [7] the rescuer, [8] the signs, [9] the direction and speed strategies, [10] the surrounding crowd, [11] the socio-cultural backgrounds, [12] etc. Yue et al [13] used the cellular automaton approach and discovered that the pedestrians keep a certain spatial distance from the boundaries of walkway, that they prefer to choose a wider movement aisle in classroom, and that the evacuation time is dominated by the narrowest one of series-connected bottlenecks. Another simulation study from the same first author modelled a mixed exit selection strategy in a multi-exit scenario, and found that there is a critical density to distinguish whether a pedestrian jam occurs in the evacuation and whether an exit selection strategy is in effect.…”

Section: Introductionmentioning

confidence: 99%

An extended social force model on unidirectional flow considering psychological and behavioral impacts of hazard source

Deng 邓,

Li 李,

Hu 胡

et al. 2024

Chinese Phys. B

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An accurate assessment of the evacuation efficiency in case of disasters is of vital importance to the safety design of buildings and street blocks. Hazard sources not only physically but psychologically affect the pedestrians, which may further alter their behavioural patterns. This effect is especially significant in narrow spaces, such as corridors and alleys. This study aims to integrate a non-spreading hazard source into the social force model following the results from a previous experiment and simulation, and to simulate unidirectional pedestrian flows over various crowd densities and Clarity-Intensity properties of the hazard source. The integration include a virtual repulsion force from the hazard source and a decay on the social force term. The simulations reveal 1) that the hazard source creates virtual bottlenecks that suppress the flow, 2) that the inter-pedestrian push forms a stabilisation phase on the flow-density curve within medium-to-high densities, and 3) that the pedestrians are prone to a less orderly and stable pattern of movement in low Clarity-Intensity scenarios, possibly with lateral collisions passing the hazard source.

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