Agitated behavior and elastic characteristics of pedestrians in an alternative floor field model for pedestrian dynamics |
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Authors: | Dong-Fan Xie Zi-You GaoXiao-Mei Zhao David Zhi-Wei Wang |
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Institution: | a School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, PR Chinab School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore |
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Abstract: | An alternative floor field (FF) model is proposed by incorporating the agitated behavior and elastic characteristics of pedestrians. The agitated behavior which is regarded as an important factor to pedestrian dynamics is depicted by introducing a parameter to revise the transition probability of pedestrians to move to the neighboring cells. To characterize elasticity of pedestrians, it is assumed that a cell can hold more than one pedestrians in crowd condition, while it can hold only one pedestrian in normal condition. In addition, a method to deal with conflicts is employed by considering the effects of agitated behavior and desired velocity. Numerical simulations are carried out to investigate pedestrian evacuation from a room. The results show, that as the value of agitated parameter increases, the evacuation time decreases to the minimum value and then increases gradually. Also, the faster-is-slower effect which is obtained by some other simulation models can be reproduced by the proposed model. Finally, the influence of exit width and the corresponding mechanism on evacuation process is investigated which is expected to be helpful to the exit design of public rooms. |
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Keywords: | Floor field Pedestrian flow Agitated behavior Elastic characteristics |
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