Prediction of the measured response of a scaled soil-pile-superstructure system |
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| Authors: | N Makris T Tazoh X Yun AC Fill |
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| Institution: | Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, USA |
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| Abstract: | The validity of the Winkler foundation model is investigated by predicting the experimentally measured displacement transfer functions and strain spectra of a single pile embedded in a sandbox and supporting a single-degree-of-freedom superstructure. The foundation-superstructure system is a scale model and was subjected to shake table excitations. The distributed springs and dashpots of the Winkler foundation model are frequency dependent and the calibrated model predicts satisfactorily the displacement transfer function at different depths for both fixed- and free-tip pile conditions. On the other hand, the pile-axial-strains are substantially underestimated when expressed in terms of the second derivative of the computed elastic line of the pile. It is shown that a much more dependable prediction is achieved when pile-axial-strains are expressed in terms of the inertial forces acting along the pile-superstructure system. |
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| Keywords: | dynamics drilled shafts modeling soil-pile-superstructure interaction |
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