Multi-Hazard Probabilistic Life Cycle Cost Analysis of Pile-Supported Wharves Under Seismic, Corrosion, and Climate Change Impacts

This paper presents a probabilistic life-cycle cost analysis of pile-supported wharves under seismic and corrosion hazards influenced by climate change. A multi-hazard framework combines nonlinear time-history analysis with a chloride-induced pitting corrosion model to assess structural deterioration under future climate scenarios. Six scenarios capture uncertainty in climate and corrosion severity. Results show that climate-induced corrosion has a significant impact on seismic fragility and long-term performance, with scenarios involving climate change and severe corrosion increasing cumulative failure costs by 8.6%. The methodology facilitates the optimization of inspection, maintenance, and design strategies for coastal infrastructure.