Dynamic Assessment of Seismic Fragility for Rc Underground Structure Considering the Uncertainty of Maintenance Policy

Key Points

• This research aims to address uncertainties in maintenance policies for RC underground structures while assessing seismic risks.
• Proposing a repeatable risk index I-HCLPFt,T for seismic risk evaluation over multiple periods.
• Developing a probabilistic risk assessment framework involving HCLPF metrics.
• Implementing a simple degradation model for simulations to support maintenance planning.
• Introduced a time-consistent risk index that aids in evaluating future maintenance needs.
• Demonstrated the potential to formulate reasonable maintenance plans through simulations.
• Presented a systematic approach for assessing seismic fragility effectively.