The vibrational period and damping of structure-foundation-soil systems are explored, with focus on the case of bridge piers on caisson foundations. To this end, a SDOF model resting on flexible supports is considered as reference model. A parametric study is then performed by considering different dimensions of the caisson, heights of the pier, mass of the deck and subsoil. Rigorous results are compared with predictions of earlier solutions, obtained in the context of the “replacement oscillator” approach, to highlight the role of the double damping terms, foundation mass, reference system for the calculation of impedances and the cross swaying-rocking stiffness.
ON THE SSI PERIOD AND DAMPING FOR BRIDGE PIERS ON CAISSON FOUNDATIONS
Di Laora R.
2023
Abstract
The vibrational period and damping of structure-foundation-soil systems are explored, with focus on the case of bridge piers on caisson foundations. To this end, a SDOF model resting on flexible supports is considered as reference model. A parametric study is then performed by considering different dimensions of the caisson, heights of the pier, mass of the deck and subsoil. Rigorous results are compared with predictions of earlier solutions, obtained in the context of the “replacement oscillator” approach, to highlight the role of the double damping terms, foundation mass, reference system for the calculation of impedances and the cross swaying-rocking stiffness.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
