Simple Dynamic Model for Fender Pile Analysis and Design
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 132, Issue 5
Abstract
Pier fender systems such as fender piling must be designed to absorb the impact energy of berthing vessels to avoid damage to either the vessel or pier structure. However, current analytical methods such as the kinetic energy approach do not consider the energy dissipated in the system during vessel impact. Energy dissipation has the effect of reducing the forces on the vessel and fender and therefore should be considered in design both to minimize overconservatism and to evaluate the relative performance of various types of fendering systems. This technical note presents a dynamic approach to the analysis of fender piles where the impacting vessel coupled with the fender pile is modeled as a freely vibrating, multidegree of freedom structure with lumped masses, stiffness, and damping. Field impact tests were conducted and compared to the new dynamic model with reasonable agreement. The new dynamic model was found to reduce the estimated forces on the pile by about 25% as compared to the kinetic energy method.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was supported by the University of Rhode Island Transportation Center (URITC), Lancaster Composites, Inc., and the Rhode Island Department of Environmental Management. The writers would also like to thank John Gaythwaite for his helpful comments during the preparation of this manuscript.
References
Baxter, C. D. P., Marinucci, A., Bradshaw, A. S., and Morgan, R. (2005). “Field study of composite piles in the marine environment.” Final Rep. Submitted to the Univ. of Rhode Island Transportation Center, Kingston, R.I.
Chopra, A. K. (2001). Dynamics of structures: Theory and applications to earthquake engineering, Prentice–Hall, Upper Saddle River, N.J., p. 427.
Department of the Army (Army). (1983). “Engineering and design of military ports.” TM 5-850-1, Washington, D.C.
Gaythwaite, J. W. (2004). Design of marine facilities for the berthing, mooring, and repair of vessels, ASCE, Reston, Va, p. 142.
Li, S., and Ramakrishnan, V. (1971). “Ultimate energy design of prestressed concrete fender piling.” J. Waterw., Harbors Coastal Eng. Div., Am. Soc. Civ. Eng., 97(4), 647–662.
Newman, J. N. (1977). Marine hydrodynamics, MIT Press, Cambridge, Mass., p. 144.
Reese, L. C., O’Neill, M. W., and Radhakrishnan, N. (1970). “Rational design concept for breasting dolphins.” J. Waterw., Harbors Coastal Eng. Div., Am. Soc. Civ. Eng., 96(2), 433–450.
Rutgers University. (1996). “Flexure tests of 12.75” diameter composite post 40 piles, preliminary report.” Preliminary Rep. Prepared by the Department of Civil and Environmental Engineering, Rutgers Univ., Piscataway, N.J.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 132 • Issue 5 • September 2006
Pages: 419 - 422
Copyright
© 2006 ASCE.
History
Received: Jun 16, 2005
Accepted: Nov 8, 2005
Published online: Sep 1, 2006
Published in print: Sep 2006
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.