Seismic Vulnerability Assessment of Deteriorating Pile Foundations in Marine Environments

• Published in: Geotechnical and geological engineering Vol. 41; no. 4; pp. 2467 - 2479
• Main Authors: Shao, Wei, He, Linmao, Shi, Danda, Li, Lin
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.06.2023; Springer Nature B.V
• Subjects: Analysis; Bearing capacity; Chloride; Chlorides; Civil Engineering; Concrete; Corrosion; Earth and Environmental Science; Earth Sciences; Earthquake damage; Earthquakes; Fragility; Geotechnical Engineering & Applied Earth Sciences; Ground motion; Hydrogeology; Limit states; Marine environment; Original Paper; Pile foundations; Piles; Probability theory; Reinforced concrete; Seismic activity; Seismic analysis; Seismic hazard; Seismic response; Seismic surveys; Service life; Soil-pile interaction; Statistical analysis; Terrestrial Pollution; Vulnerability; Waste Management/Waste Technology; Yield stress; Seismic vulnerability analysis; Pile foundations; Exceedance probability; Chloride-induced corrosion; Soil-pile interaction
• ISSN: 0960-3182; 1573-1529
• DOI: 10.1007/s10706-023-02409-5

An analysis model is presented to estimate the time-varying seismic performance of deteriorating pile foundations subjected to marine chloride-induced corrosion. Based on the presented model, a probabilistic seismic fragility analysis of pile foundations is conducted considering uncertainties of ground motion. The effects of chloride erosion and seismic action on the seismic response of pile foundations are investigated in this study. The displacement and damage state of deteriorating pile foundations under seismic action at different service times are obtained through seismic vulnerability analysis. The analysis results have revealed that the chloride attack has a great impact on the seismic vulnerability analysis of deteriorating pile foundations. The ultimate state threshold of pile foundations decreases with the increase of service life. The ultimate lateral bearing capacity decreases significantly with increasing service time. Moreover, the seismic fragility is underestimated based on the vulnerability of pile foundations model without considering the factors of soil-pile interaction. The seismic performance decreases significantly and the failure probability of pile shows an accelerated growth trend with increasing service time. The exceedance probability increases dramatically as the damage limit state increases for the same time.