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Emergency evacuation risk assessment for toxic gas attacks in airport terminals: Model, algorithm, and application

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  • Luan, Tianyi
  • Gai, Wenmei
  • Sun, Diange
  • Dong, Hao

Abstract

Transportation infrastructure has often been the target of terrorist attacks, and mitigation of the risk of toxic gas attacks is a challenging task in the design of indoor emergency evacuation systems. Considering multiple emergency response modes, we propose an agent-based risk assessment model and its algorithm to integrate gas diffusion and pedestrian movement data for emergency response, quickly assessing average individual exposure risk. We assessed the exposure status of individuals with respect to their emergency response actions following a toxic gas attack in an airport terminal. The results indicate that in the event of a general gas attack on an airport terminal, ventilation must be immediately ceased along with early evacuation. In areas with a shelter-in-place environment, the ventilation mode and shelter-in-place time should be determined based on the concentration of indoor and outdoor gases. In areas with nerve gas exposure and high population density, a new exit must be established at evacuation bottlenecks, and pedestrians must be guided to evacuate while promptly closing ventilation. These results offer suggestions and strategies for emergency response and decision-making in airport terminals during such incidents.

Suggested Citation

  • Luan, Tianyi & Gai, Wenmei & Sun, Diange & Dong, Hao, 2025. "Emergency evacuation risk assessment for toxic gas attacks in airport terminals: Model, algorithm, and application," Reliability Engineering and System Safety, Elsevier, vol. 253(C).
    • Handle: RePEc:eee:reensy:v:253:y:2025:i:c:s0951832024006471
    DOI: 10.1016/j.ress.2024.110576
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