Displacement-Based Seismic Design of Drilled Shaft Bents with Soil-Structure Interaction

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Abstract
The Direct Displacement-Based Design method is implemented for performance based seismic engineering of drilled shaft bents with consideration of soil-structure interaction effects. This was accomplished by defining an equivalent model that allows the prediction of yield displacement, displacement ductility and equivalent viscous damping for the in-plane and out-of-plane response of bents embedded in soft clay and sand. The utilization of the model is simple and requires the input of geometry, basic soil properties, target performance in terms of top displacement, ductility or strain limits and seismic demand in the form of displacement response spectra. Examples are presented to demonstrate the application of the procedure.

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