An analysis of evacuation travel paths on stair landings by means of conditional probabilities
Författare
Summary, in English
This paper analyses data on occupants׳ movement on stair landings collected during an evacuation drill performed in a six-storey office building in the United States. A total of 215 occupant travel path trajectories were filmed and time on the stair landings and egress behaviours were analysed. Data were analysed using a probabilistic approach, i.e., the probability of different occupant travel paths were calculated in relation to two different factors: (1) crowding on the landings, and (2) the type of interactions between occupants (e.g., merging flows, deference/overtaking behaviours, etc.). Results showed that a higher number of occupants on stair landings caused an increase in the probability for (1) longer travel paths and (2) usage of the outer boundaries on the stair/landing connections. This paper highlights that data and modelling assumptions should be used after a careful evaluation of their field of applicability. In the case of a low occupant load and non-homogenous merging streams (a higher number of people entering the landing from the stairs than the door), floors tend to be emptied from the top to the bottom.
Avdelning/ar
Publiceringsår
2014
Språk
Engelska
Sidor
30-40
Publikation/Tidskrift/Serie
Fire Safety Journal
Volym
65
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Building Technologies
Nyckelord
- Building evacuation
- Merging flows
- Pedestrian movement
- Travel paths
- Conditional probabilities
Status
Published
Forskningsgrupp
- Evacuation
ISBN/ISSN/Övrigt
- ISSN: 0379-7112