Performance-Based Fire Safety Assessment of City Underwater Tunnel

Safe evacuation criterion was first analyzed for fire safety assessment of city underwater tunnel. Then a worst fire scenario of a real underwater tunnel was set up, and simulations on fire smoke spread and people evacuation were carried out based on this scenario. The available safe egress time (ASET) was derived from the fire simulation, while the required safe egress time (RSET) was derived from evacuation simulation. According to the performance-based fire code, fire safety assessment of the tunnel was carried out based on the comparison between ASET and RSET.