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

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

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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 fur-ther alter their behavioral 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 ex-periment 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(ⅰ)that the hazard source creates virtual bottlenecks that suppress the flow,(ⅱ)that the inter-pedestrian push forms a stabilisation phase on the flow-density curve within medium-to-high densities,and(ⅲ)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.

evacuationsocial force modelhazard sourceunidirectional pedestrian flow

邓凯丰、李梦、胡祥敏、陈涛

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Institute of Public Safety Research,Department of Engineering Physics,Tsinghua University,Beijing 100084,China

Anhui Province Key Laboratory of Human Safety,Hefei 230601,China

Beijing Key Laboratory of Comprehensive Emergency Response Science,Beijing 100084,China

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

2022YFC33208002021YFC15235007197112671673163723041657220413672104123

2024

10.1088/1674-1056/ad1173

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(2)
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