Fragility Assessment of Single Concrete Pier and Pile-Soil Interaction Impact under Near and Far-Fault Earthquakes

Abstract

Civil engineers face a significant challenge in assessing seismic vulnerability due to the complex of soil-pile-structure
interaction system. This research aims to evaluate the seismic vulnerability of individual piers under various seismic
ground motions. Factors like sand type, pile diameter, pier height, and mass placed were investigated for their impact
on the seismic fragility of concrete piers. Using incremental dynamic analysis with a beam on a nonlinear Winkler
foundation model, the study compared the effects of near and far ground motions. Results from the dynamic analysis
and fragility assessment demonstrated the effects of the parameters above-mentioned on the design of fragility
curves, as well as its relationships to fundamental period of structural system.