Fragility Curves for Assessing the Seismic Vulnerability of Gravity Quay Walls

Abstract eng:
Ports and marine structures have an important role in global transportation and world economy. Seismic vulnerability of marine structures can be evaluated through the probabilistic approaches in order to account for the uncertainties involved the structural capacity and seismic demand of such projects. The purpose of this study is to develop fragility curves for gravity quay walls. Numerical analyses are preliminarily carried out to capture the seismic displacement response of such structures to earthquake excitations. The recorded displacements of a previously conducted physical model test are employed to validate performance of the numerical modeling. A fully nonlinear soil model is used in the seismic analyses. Numerous seismic analyses are then performed using actual earthquake motions with various characteristics such as peak ground acceleration and predominant period. The results of numerical simulations are then analyzed through the probabilistic procedure to derive fragility curves for the gravity quay walls. Various performance criteria including serviceable, repairable, and near collapse damages are consequently determined by the fragility curves. Finally, results of this study are compared with the performance criteria recommended by the available performance-based guidelines of the port structures

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