Full Life Cycle Multi-hazard Scenarios and Structural Response Analysis of Metro Shield Tunnels

The article proposes a method for constructing multi-hazard action scenarios in the entire lifespan of metro shield tunnels, based on extensive research on hazard cases and defect data. This method involves combining the tunnel’s health state field with sudden hazard scenarios, and it identifies various multi-hazard scenarios that should be considered throughout the tunnel’s lifespan. Subsequently, a simplified multi-hazard scenario is employed to analyze the tunnel’s structural response. The computational findings reveal that accounting for tunnel defects results in greater structural damage. Moreover, the structural damage is significantly amplified when multiple hazards effects are taken into account, thus underscoring the importance of considering multi-hazard scenarios in the analysis of structural damage.