A Review of Building Evacuation Models - NIST Virtual Library
A Review of Building Evacuation Models - NIST Virtual Library
A Review of Building Evacuation Models - NIST Virtual Library
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A.4 WAYOUT<br />
Developer: V.O. Shestopal, Fire Modelling & Computing, AU<br />
Purpose <strong>of</strong> the model: WAYOUT has been created to compute traffic flow in emergency<br />
situations from a multi-room or multi-story building. In this model, only merging flows are<br />
considered 11, 12 .<br />
Availability to the public for use: The model is available from Fire Modelling & Computing in<br />
Australia as part <strong>of</strong> FireWind (18 programs) and the price is negotiable.<br />
Modeling method: Movement model<br />
Structure <strong>of</strong> model: This is a coarse network system. The model labels each compartment <strong>of</strong><br />
constant width with a number and refers to this compartment as a “twig.” If the compartment<br />
has a variable width, it is divided into multiple twigs. For a building evacuation with multiple<br />
exits, it is up to the user to draw “watersheds” to divide the flows (on the basis <strong>of</strong> psychological<br />
or other considerations) and compute the route separately. The method <strong>of</strong> labeling nodes in<br />
WAYOUT is shown in Figure A.5.<br />
Figure A.5: Example <strong>of</strong> how nodes are labeled in WAYOUT<br />
12, p. 628<br />
Perspective <strong>of</strong> model: The model views the occupants globally as “packs.” And, since the<br />
occupants have only one route to choose from, the occupants’ perspective will be labeled as<br />
global, also.<br />
Occupant behavior: None.<br />
Occupant movement: The movement <strong>of</strong> the occupants is based on density versus speed data<br />
collected by Predtechenskii and Milinskii 13 . Density is defined as D=Nf/wL, where N is the<br />
A-10