Abstract
In amendment of Building Standards Act of the year 2000, the verification method for evacuation safety was introduced. Knowledge gained in Togawa’s study (1955) is frequently used in this verification method; however, depending on the spatial condition, the estimated results differ from the actual crowd walk nature and this remains a challenge. Considering the situation, this study aims to illustrate the relationship between the spatial condition and crowd walk nature and analyze data gained from the Crowd Evacuation Experiment done in 2015 at Tokyo University of Science. When a corridor includes an opening (a bottleneck) or a merging, a pedestrian crowd will be restrained at the opening/merging. Each part of the bottleneck corridor showed a very similar feature as the merging corridor. Therefore, this study analyzed the bottleneck corridor and merging corridor with a uniform model. These analysis results confirmed the relationship between each part’s density and the ratio of inflow width to the outflow width and showed that specific flow can be calculated from the margin of two densities, regardless of the spatial condition.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Abbreviations
- B :
-
Bottleneck width (m)
- B m :
-
Merging width in merging corridors (m)
- D :
-
Corridor width (m)
- D m :
-
Corridor width in merging corridors (m)
- D* :
-
Dimensionless width defined by the ratio of inflow width Dm to the outflow width Dm + Bm (−)
- N j :
-
Specific flow of section j (person/m/s)
- R j :
-
Flow rate of section j (person/s)
- ρ k :
-
Density of zone k (person/m2)
- γ :
-
The ratio of mainstream specific flow Nmain and sidestream specific flow Nside (m)
- after:
-
Of after merging zone
- before:
-
Of before merging zone
- junction:
-
Of junction zone section
- main:
-
Of mainstream section
- side:
-
Of sidestream section
References
Togawa, K. (1955). Study of fire escape based on the observation multitude currents. Report of the Building Research Institute, No. 14.
Tamura, Y., Sano, T., Tange, M., Yamaguchi, J., Ohmiya, Y., others (2016). Study on pedestrian flow no. 1–10. In Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan.
Tange, M., Imanishi, M., Sano, T., Ohmiya, Y., others (2016). Image processing of pedestrian behavior with multiple color markers and its application to crowd evacuation experiment. Journal of Architecture and Planning (Transactions of AIJ), 81(730), 2645–2652 (in Japanese).
Acknowledgements
This experiment was conducted under a collaborative research agreement between Akeno Facility Resilience Inc., FDM Corporation, Kajima Corporation, National Research Institute of Fire and Disaster, Obayashi Corporation, Shibaura Institute of Technology, Shimizu Corporation, Taisei Corporation, Takenaka Corporation, Tokyo University of Science, and Waseda University (in alphabetical order). This study was supported by the Joint Research 2017 by the Research Center for Fire Safety Science, part of the Organization for Research Advancement of the Tokyo University of Science.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Fujimoto, N. et al. (2020). Study on Pedestrian Flow Prediction of Specific Flow Using Dimensionless Width. In: Wu, GY., Tsai, KC., Chow, W.K. (eds) The Proceedings of 11th Asia-Oceania Symposium on Fire Science and Technology. AOSFST 2018. Springer, Singapore. https://doi.org/10.1007/978-981-32-9139-3_20
Download citation
DOI: https://doi.org/10.1007/978-981-32-9139-3_20
Publisher Name: Springer, Singapore
Print ISBN: 978-981-32-9138-6
Online ISBN: 978-981-32-9139-3
eBook Packages: EngineeringEngineering (R0)