Abstract
ABSTRACT The relative density of seabed determines its bearing capacity and affects the site selection, construction, and maintenance of offshore projects. As the modal-identification-based method for monitoring pile foundation scour depth does not account for the relative density of seabed, it cannot be implemented in engineering practice. Therefore, experiments and finite element simulations of a pile–soil model with different scour depths were conducted in this study to update and verify the modal-identification-based method to account for relative soil density using the Winkler foundation model. The results show that for a given scour depth, the average error decreased as the relative soil density increased, and for a given relative density, the average error decreased as the scour depth increased. The accuracy of the updated method was then improved according to the variation of the average error according to soil density and shown to exhibit strong engineering applicability.
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