Optimization of emergency shelter layout with consideration of toxic gas leakage based on a cell transmission model

IF 4.7 1区工程技术 Q1 ENGINEERING, INDUSTRIAL

Safety Science Pub Date : 2025-02-09 DOI:10.1016/j.ssci.2025.106810

Jinghong Wang , Yuqing Liu , Qingzhao Li , Jialin Wu , Yan Wang , Juncheng Jiang

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引用次数: 0

Abstract

The layout and site selection of emergency shelters have a significant impact on the efficiency of large-scale crowd evacuation. However, during the actual evacuation process, there may be factors that affect the capacity of evacuation routes. This paper considers the problem of decreased road capacity due to toxic gas effects. By extending the Cell Transmission Model (CTM) and incorporating additional constraints, a linear programming model for emergency evacuation traffic was developed. Based on an improved CTM, this study examines the impact of different emergency shelter layouts in the Tianjin Port area. The results indicate that under the actual conditions at Tianjin Port, the evacuation efficiency differs by 22.43% between scenarios with and without the presence of toxic gases. A reasonable layout of additional shelters can improve evacuation efficiency by up to 45.33%. However, if the number of shelters is excessively increased, it could exacerbate congestion and reduce evacuation efficiency by up to 59.81% under the influence of toxic gases. The value of this study lies in its establishment of a model that can more accurately assess evacuation risks under the influence of toxic gases and inform the strategic placement of emergency shelters.

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来源期刊

Safety Science 管理科学-工程：工业

CiteScore

13.00

自引率

9.80%

发文量

335

审稿时长

53 days

期刊介绍： Safety Science is multidisciplinary. Its contributors and its audience range from social scientists to engineers. The journal covers the physics and engineering of safety; its social, policy and organizational aspects; the assessment, management and communication of risks; the effectiveness of control and management techniques for safety; standardization, legislation, inspection, insurance, costing aspects, human behavior and safety and the like. Papers addressing the interfaces between technology, people and organizations are especially welcome.