Abstract
Emergency evacuation in high-rise buildings is a crucial problem. The evacuation strategy of using stairs and evacuation elevators should be optimized. In this paper, simulation-based optimization method is used to optimize the evacuation strategy of using stairs and elevators in high-rise buildings. The stair simulation is based on a cellular automata model, and several typical pedestrians’ walk preferences are considered in this model. In the simulation, evacuation elevators can arrive at the refuge floors, and the scheduling of the elevators is optimized based on the GA algorithm. The simulation-based optimization is designed as a two-level problem: The upper level is a strategy level; the lower level is an operation level. In the study case, the evacuation strategy of a 100-floor ultra-high-rise office building is optimized. We find that if evacuees follow the traditional stair evacuation strategy, the evacuation time is 42.6 min. After optimization, the evacuation time of optimal strategy by using both stairs and elevators is 25.1 min. Compared with the traditional stair evacuation strategy, the efficiency of evacuation is improved by 41.1%. It is also found that the merging behavior in stairwells will decrease the velocity of the pedestrian flow. Stairs are still the main egress, and evacuation elevators are an assistant egress during high-rise building evacuation.
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Acknowledgements
This work was partially supported by the Basic Research Program of People’s Public Security University of China (2016JKF01307), the National Natural Science Foundation of China (71373139, 91646201) and the 12th Five-Year Technology Support Program (2015BAK10B00). The authors appreciate the support for this paper by the Collaborative Innovation Center of Public Safety.
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Ding, N., Zhang, H. & Chen, T. Simulation-based optimization of emergency evacuation strategy in ultra-high-rise buildings. Nat Hazards 89, 1167–1184 (2017). https://doi.org/10.1007/s11069-017-3013-1
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DOI: https://doi.org/10.1007/s11069-017-3013-1
Keywords
- SBO
- Building evacuation
- Optimization
- High-rise building