Zhang Longmei, Wu Xin, Lin Huali, Zhang Man, Liu Yonghong
College of Engineering , Sichuan Normal University , 610101, Chengdu Sichuan, China.
Ministry of Education Key Lab of land Resources Evaluation and Monitoring in Southwest, Sichuan Normal University, Chengdu Sichuan, 610068, China.
Sci Rep. 2024 Oct 30;14(1):26182. doi: 10.1038/s41598-024-77726-7.
Due to simultaneous horizontal and vertical displacement during vertical evacuation, the consequences of stampede congestion accidents can be more severe. Generally, pedestrians trigger a synchronization mechanism at some point during the vertical evacuation process. This synchronization behavior helps prevent stampede congestion and improves evacuation efficiency. This paper designs a well-controlled single-file vertical evacuation experiment. After the experiment, the video footage is imported into the TRACKER system to extract the coordinates of pedestrian step movements, after which the experimental data undergo calculations and visual analysis. The research findings indicate the following: Firstly, when the crowd coordinates trigger the synchronization mechanism, this behavior remains stable as long as pedestrian speed and direction are unchanged; Secondly, the variation in footstep speed over time is not directly related to the footstep synchronization rate of the crowd; Lastly, this study calculated the characteristic density value most likely to trigger the synchronization mechanism during vertical evacuation. This research deepens our understanding of crowd dynamics, reveals the characteristics of pedestrian movement during vertical evacuation, and proposes evacuation guidance strategies based on these features.
由于垂直疏散过程中同时存在水平和垂直位移，踩踏拥堵事故的后果可能会更严重。一般来说，行人在垂直疏散过程中的某个时刻会触发一种同步机制。这种同步行为有助于防止踩踏拥堵并提高疏散效率。本文设计了一个控制良好的单列垂直疏散实验。实验结束后，将视频片段导入TRACKER系统以提取行人脚步移动的坐标，然后对实验数据进行计算和可视化分析。研究结果表明：第一，当人群坐标触发同步机制时，只要行人速度和方向不变，这种行为就会保持稳定；第二，脚步速度随时间的变化与人群的脚步同步率没有直接关系；最后，本研究计算出了垂直疏散过程中最有可能触发同步机制的特征密度值。这项研究加深了我们对人群动态的理解，揭示了垂直疏散过程中行人运动的特征，并基于这些特征提出了疏散引导策略。
