A Review of Building Evacuation Models - NIST Virtual Library

y the arc), which is calculated by using the distance of the arc and the speed of the occupants.
The arc flow capacity is the upper limit on the number of people that can traverse the
passageway per time period, which is calculated using the width of the arc and the flow
(persons/foot-minute) of the occupants through that space. The data (speed and flow) is
provided by the user, meaning that the source of the movement data is left up to the user to
decide. And, once specified for the occupants of the simulation, the data (speed and flow)
remain constant.
Use of fire data: None.
Output: The output is organized and explained in Table A.1.
Parameter
General overview
Destination node distribution
Total arc movement
Identification of bottlenecks
Floor clearing time
Node clearing time
Uncongested evacuation time
by node
Building evacuation profile
Destination evacuation profile
Node contents profile
Arc movement profile
Bottleneck information for a
specific arc
Node contents snapshot
Non-evacuee allocation
Table A.1: EVACNET4 Output
Description
Time to evacuate the building, time of uncongested
evacuation, the congestion factor (building evacuation time
divided by uncongested evacuation time), the average time for
an evacuee to egress the building, the average number of
evacuees per specified time period, the number of successful
evacuees
Number of evacuees that passed through that exit to safety
List of arcs and the number of people traveling through each
one
List of arcs that had bottlenecks (queues) and the
corresponding time periods that the arc was a bottleneck
Time period that the last evacuee left that floor
Time period that the last evacuee left the node
Number of time periods that the node was uncongested
Number of evacuees per time period
Number of evacuees per exit per time period
Number of people waiting at the end of a time period for a
specified node
Number of people moving at the end of a time period for a
specific arc, respectively
Number of people waiting at a specific node
Number of people at a specific node at a specified time period
Number of people not evacuated by a particular time period
Use of fire data: None.
Import CAD drawings: No. The user enters capacity of the nodes and the initial contents.
Building data is not necessarily supplied because the dynamic capacity (flow) and the traversal
times specified in the input move people throughout the building as evacuation time progresses.
Visualization capabilities: None.
A-6