ANALYSIS OF THE FLUID DYNAMIC BEHAVIOR OF AN ENCLOSED STAIRCASE UNDER FIRE

Resumo

The analysis of fire through computer modeling allows the improvement of current legislation, as well
as fire protection and fighting techniques. This work presents an analysis of the fluidodynamic behavior of a
cloistered staircase (EP) under fire through a computational modeling using the commercial software Fire
Dynamics Simulator (FDS), developed by NIST (National Institute of Standards and Technology). The Enclosed
Ladder (EP) was dimensioned according to the specifications of the NBR 9077 standard(1). Through the
simulation, it is possible to understand the fluidodynamic behavior of (PE) in relation to the aspects of smoke
behavior in fire situations and develop mitigating measures for buildings already built. The results showed that the
use of (PE) with the dimensions provided for by NBR 9077 (1) is not effective, since it confines the smoke inside
the staircase and does not provide the complete escape of the smoke from its interior, being proposed in this worka
larger opening dimension dthe windows for smoke escape, as well as the creation of a gap that provides the entry
of air inside the staircase in a natural way, providing a better distance of visibility.