Investigation of a Two-Dimensional Unsteady-State Thermo-Mechanical Model of the Tunnel During a Fire

Abstract

The linings of tunnels would suffer severe structural injury or maybe failure e when unprotected from a persistent blaze. Loss of life, property destruction, and prolonged service interruptions are only some of the potential outcomes of a major tunnel fire. Special design factors are required when considering the structural reaction to fire in a tunnel due to the quick increase of gas temperature to more than 1,000°C (1,832°F) and the extended fire duration due to restricted access for rescue workers. The duration of the heating process has a significant impact on the damage. In this paper, a 2D unsteady-state Thermo-Mechanical (TM) model is recognized to examine the time-dependent temperature and stress distributions of tunnel lining below the fire. Ventilation, Smoke Exhaust System, Fire Alarm System (FAS), and Rehabilitation are employed to develop the tunnel during a fire. In the result, according to the temperature criteria and the Residual Stress (RS) condition, the injury development of tunnel lining is analyzed. The findings of the comparison provide theoretical confirmation of the convergence of these two factors.