Trajectory-based analysis on pedestrian turning movement on a stair landing
Trajectory-based analysis on pedestrian turning movement on a stair landing
复制标题
DOI：
10.1016/j.ssci.2021.105622
复制
发表时间：
2022-03
期刊：
影响因子：
6.1
通讯作者：
Rui Ye;Zhiming Fang;Zhongyi Huang-;Liping Lian;Xiaolian Li;Yan Gao;Jiajia Liu
中科院分区：
文献类型：
--
作者：
Rui Ye;Zhiming Fang;Zhongyi Huang-;Liping Lian;Xiaolian Li;Yan Gao;Jiajia Liu
本文对楼梯平台上的行人转弯运动进行了基于轨迹的分析。提取的轨迹表明行人沿着弧形小路行走。没有观察到由于行人希望在转弯运动中寻找最短路径而产生的压缩效果。根据角速度和速度的变化趋势，可以将整个转弯过程分为两个阶段，即下楼时的减速匀速阶段和上楼时的加速匀速阶段。根据基本示意图，与上楼运动相比，步行者在楼梯平台上下楼时移动速度更快，由于转弯运动和楼梯的影响，其速度远低于直廊。从基本原理图中可以看出两种状态。当密度低于临界值时，速度随密度的增加而急剧下降，当密度高于临界值时，速度趋于平缓。根据密度分布，密度最大的区域出现在转向下降运动后，密度最大区域出现在转向上升运动之前。以由轨迹计算出的平均速度为参考，进一步给出了基于假设路径的参数(如圆弧路径的转弯半径)的经验值。
In this paper, we conduct a trajectory-based analysis on pedestrian turning movement on a stair landing. The extracted trajectories indicate pedestrians walk along arc paths. The compression effect resulting from pedestrians’ desire to seek the shortest path during the turning movement is not observed. Based on the developing trends of angular speed and speed, two phases can be distinguished during the whole turning process, namely deceleration and uniform speed phase when moving downstairs, and acceleration and uniform speed phase when moving upstairs. According to the fundamental diagrams, compared with ascent movement, pedestrians move faster when going downstairs on the stair landing, and the speed is much lower than that in the straight corridor, due to the effect of turning movement and stairs. Two regimes can be spotted from the fundamental diagrams. When the density is lower than the critical one, the speed decreases sharply with the increase of density, while it decreases smoothly when the density is higher than the critical one. According to the density distributions, the area with the maximal density occurs after turning for descent movement, while it occurs before turning for ascent movement. Taking the average speed computed from trajectories as a reference, we further provide some empirical values for parameters (e.g., the turning radius of the arc path) proposed in the method based on hypothetical travel path.