[2232] TIME-DEPENDENT RELIABILITY ASSESSMENT OF SHIELD TUNNELS UNDER CHLORIDE AND HYDRAULIC PRESSURE HAZARDS
Keywords:chloride attack, hazard assessment, hydrostatic pressure, life-cycle reliability, shield tunnel
In contrast to ground reinforced concrete structure systems, shield tunnels in coastal regions undergo more complicated and rapid deteriorating processes owing to the coupling effects of multiple mechanical and environmental stressors during the tunnel life-cycle. In this paper, a time-dependent structural reliability assessment method considering the hazards associated with chloride around the shield tunnel and the impact of hydrostatic pressure is proposed. Monte Carlo Simulation is used in conjunction with a failure probability estimation associated with the occurrence of concrete cracking due to the steel corrosion.