Influence of Congestion in Upper Floor on Pedestrian Flow in Staircase Based on Observational Survey of Evacuation Drill in a High-Rise Building

  • Kosuke FujiiEmail author
  • Masayuki Mizuno
  • Hiroyuki Kadokura
  • Tomonori Sano
  • Ai Sekizawa
Conference paper


The occupants shall evacuate the building through stairs, in case of fire of high-rise building. A number of evacuees may cause the congestion on stairs. This paper focuses on the characteristics of the non-merging evacuation flow, which is the flow consisting only of evacuees descending on the staircase without merging there under flow conditions on the upper floor, which are generated by the merging of persons going down the staircase and entering there. This study used the data obtained in the observational survey on the real evacuation drills repeated annually for three years in the high-rise building. The flow conditions were classified into three groups based on the congestion and the merging of evacuations in the staircase. As a result of this study, the characteristics of the non-merging evacuation flow in each of the three groups were elucidated.


Total evacuation Evacuation drill Observational survey Specific flow Staircase 


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Kosuke Fujii
    • 1
    Email author
  • Masayuki Mizuno
    • 2
  • Hiroyuki Kadokura
    • 3
  • Tomonori Sano
    • 4
  • Ai Sekizawa
    • 2
  1. 1.National Research Institute of Fire and DisasterChofu, TokyoJapan
  2. 2.Graduate School of Science and TechnologyTokyo University of ScienceNoda, ChibaJapan
  3. 3.Faculty of EngineeringTohoku Gakuin UniversityTagajo, MiyagiJapan
  4. 4.Faculty of Human SciencesWaseda UniversityTokorozawa, SaitamaJapan

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