Simplified Expression of Hydrodynamic Pressure on Deepwater Cylindrical Bridge Piers during Earthquakes
Publication: Journal of Bridge Engineering
Volume 22, Issue 6
Abstract
The expressions of hydrodynamic pressure based on the radiation wave theory are too complex to be conveniently utilized in engineering applications; therefore, a simplified extraction that is accurate and concise for calculating the hydrodynamic effect on deepwater bridge piers is highly desirable for seismic analyses. With a further comparison between the elastic vibration and rigid motion of cylindrical piers submerged in water, the hydrodynamic pressure of the cylindrical piers can be approximately acquired in terms of the added mass caused by rigid motion based on the linear radiation wave theory. A simplified formula for the hydrodynamic pressure is proposed by elaborate data fitting, in which the section radius of the pier and the water height are the main parameters. The accuracy of the proposed formula is validated by the radiation wave theory and the potential-based fluid-element method. Results prove that the simplified expressions are not only accurate but also convenient in calculating the hydrodynamic pressure of cylindrical piers with a wide range of geometries. The applicability of the Morison equation and the Goto-Toki formula is also presented.
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Acknowledgments
Support from the National Natural Science Foundation of China (Grant 51378050), the 111 Project (Grant B13002), the Major Project of China Railway Corporation (2013G002-A-3), and the Fundamental Research Funds for the Central Universities (Grant 2016JBM044) is gratefully acknowledged. The authors are grateful to Dr. George P. Mavroeidis at the University of Notre Dame for valuable suggestions. The authors also express their gratitude to the editor and reviewers for their instructive comments on the manuscript.
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Published In
Journal of Bridge Engineering
Volume 22 • Issue 6 • June 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: May 31, 2016
Accepted: Dec 1, 2016
Published online: Mar 3, 2017
Published in print: Jun 1, 2017
Discussion open until: Aug 3, 2017
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