Human Incapacitation Analysis Caused by Combustion Gases Toxicity in Different Building Fire Scenario

摘要

The human incapacitation caused by combustion gases in the typical eight building fire scenarios are evaluated and compared according to the concentration-response curves throughout the fire. The hazard degree for the different fire scenarios to human is Scenario 4 (Closet)> Scenario 2 (Kitchen)＞ Scenario 3 (Mattress)> Scenario 7 (Family closed)＞ Scenario 6 (Family open)＞ Scenario 8 (Office)> Scenario 5 (Christmas tree)> Scenario 1 (Sofa), which human incapacitation happen about 1.33, 3.97,4.52, 5.02, 5.03, 1.57, 15.33,29.88 minutes after ignition, respectively. Of all the fire scenarios, the occupants in the Scenario 4, Scenario 2, Scenario 3, Scenario 7, Scenario 6, Scenario 8, Scenario 5, Scenario 1 would have about 1, 3, 4, 5, 5, 1, 15, 29 minutes to accomplish escape, respectively. There would be more likelihoods for human to accomplish escape if they were alert to the ignition in Scenario 5 and Scenario 1. Although there can produce more CO when the doors are closed, the scenarios with doors closed don't show more toxicity than that with door opened. The rising speed of toxic gases concentration caused by different combustion conditions take important roles in human incapacitation, which indicate fire gases toxicity is very complex not only depending on their concentration, but also depending on their rising speed throughout the fire scenarios.