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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 3405619, 10 pages
Research Article

Risk-Field Based Modeling for Pedestrian Emergency Evacuation Combined with Alternative Route Strategy

School of Electronic and Information Engineering, Tongji University, Shanghai 201804, China

Correspondence should be addressed to Chao Wang

Received 20 December 2016; Revised 22 March 2017; Accepted 2 April 2017; Published 20 April 2017

Academic Editor: Antonio Bilotta

Copyright © 2017 Chao Wang and Jian Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


For the past decades, with the frequent occurrence of emergencies, such as stampede, fire, and terrorist attack, the urgent requirements of developing realistic evacuation models to describe pedestrian and disaster dynamics are put forward. In this paper, an extended floor-field (FF) model combined with risk factors is presented for emergency evacuation. A novel dynamic rerouting mechanism is designed to elucidate the exit choice behavior of evacuees, and meanwhile, a recommended dynamic risk-field model is fully explored to deal with dynamical features of disaster. The proposed model is validated through numerical simulations with specific room structures. The effects of model parameters on evacuation efficiency and death toll are analyzed in detail. Simulation results show that the proposed model is effective and has a positive influence on evacuees’ exit choice behavior, and the death toll is closely related to the perceived information obtained by evacuee, such as the crowd density during the evacuation process.