Research On Microscopic Simulation Modeling Of Pedestrian Path Selection Behavior

With the large-scale events are increasingly frequent and the construction scale of pedestrian facilities such as transportation hubs,stadiums and malls increasingly expanding,it gets to be increasingly crowded for the pedestrians in the facilities.And there's a growing concern about the growing problem of operation security,efficiency and comfort of the pedestrian traffic.Pedestrian microscopic simulation is an important means for reproducing and predicting in pedestrian flow research,which provides guidance for the planning of facilities for pedestrian facilities and the management of pedestrian flow.On the base of the social force model,this paper studies the behavior characteristics of pedestrians' route choice,and investigates the law of pedestrian self-organization.It put forward a framework of microscopic simulation model with the function of self-organization,heterogeneous crowd(individual and group)and global routing,after review of the simulation results of pedestrian microscopic simulation model in previous studies.This paper constructs a local path selection model for pedestrians by improving the social force model from the perspective of the pedestrian visual information and the group,and introduces the global path selection model based on the shortest path algorithm.The improved model simulation results show that it weakens the shock in the improved model simulation with the pedestrian visual information,and the group structure turns into a dynamic sub-group based multi-row pattern when density of crowd or number of group members increases.The experimental results demonstrate that:the existence of groups in crowd decreases the speed of pedestrian flow but the effect weakens with the increase of flow density;our model can improve the efficient of simulated pedestrian flow and make it closer to the actual crowd dynamics.The results of simulation of pedestrians' global route choice behavior on the network demonstrate that the level of pedestrian traffic is the main impact of pedestrian dynamic route selection.At low level,one would consider physical strength,however,he will inclined to choose the route with high comfort and short time after weighing the physical strength,walking comfort and walking time when the pedestrian traffic volume increases.This study improved the social force model description ability for the pedestrian behavior,as well as the pedestrian flow characteristics,which provides theories foundation for the design of pedestrian facilities.