Response of Offshore Towers with Pile Interaction
Publication: Journal of Engineering Mechanics
Volume 113, Issue 7
Abstract
Interaction between piles, known as pile‐soil‐pile interaction or group effect, modifies both group stiffness and damping and, consequently, affects the dynamic properties and behavior of the offshore tower. The formulation of the pile group stiffness by means of dynamic interaction factors is outlined, frequency dependent dynamic interaction factors are presented for piles with separation (gapping), and examples of pile group stiffness and damping are given. Then, the pile group properties are included in the dynamic analysis of an offshore tower. The effects of pile‐soil‐pile interaction on tower modal properties, i.e., natural frequencies, mode shapes, and damping, as well as response to wave action, are demonstrated.
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References
1.
Angelides, D. C., “Stochastic Response of Fixed Offshore Structures in Random Seas,” thesis presented to the Massachusetts Institute of Technology, at Cambridge, Mass., in 1979, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2.
Angelides, D. C., and Roesset, J., “Nonlinear Dynamic Stiffness of Piles,” Research Report R80‐13, Dept. of Civil Engineering, M.I.T., Cambridge, Mass., 1980.
3.
El Sharnouby, B., and Novak, M., “Static and Low Frequency Response of Pile Groups,” Canadian Geotechnical Journal, Vol. 22, No. 1, Jan., 1985, pp. 79–94.
4.
El Sharnouby, B., and Novak, M., “Flexibility Coefficients and Interaction Factors for Pile Group Analysis,” Canadian Geotechnical Journal, Vol. 23, No. 4, Nov., 1986, pp. 441–450.
5.
Kaynia, A. M., and Kausel, E., “Dynamic Behaviour of Pile Groups,” Conference on Numerical Methods in Offshore Piling, University of Texas, Austin, Tex., 1982, pp. 509–532.
6.
Matlock, H., Foo, S. H. C., and Bryant, L. M., “Simulation of Lateral Pile Behaviour under Earthquake Motion,” Proceedings ASCE, Specialty Conference on Earthquake Engineering and Soil Dynamics, Pasadena, California, Vol. II, 1978, pp. 600–619.
7.
Mitwally, H., and Novak, M., “Influence of Pile‐Soil‐Pile Interaction on Modal Properties of Offshore Towers,” Proceedings, Third Canadian Conference on Marine Geotechnical Engineering, St. John's, Newfoundland, Canada, 1986, pp. 709–727.
8.
Morison, J. R., O'Brien, M. P., Johnson, J. W., and Schoaf, S. A., “The Forces Exerted by Surface Waves on Piles,” Petroleum Transactions AIME, Vol. 189, T. P. 2846, 1950, pp. 149–157.
9.
Nogami, T., and Paulson, S. K., “Transfer Matrix Approach for Nonlinear Pile Group Response Analysis,” Journal Numerical and Analytical Methods in Geomechanics, Vol. 9, 1985, pp. 299–316.
10.
Novak, M., “Dynamic Stiffness and Damping of Piles,” Canadian Geotechnical Journal, Vol. 11, No. 4, Nov., 1974, pp. 574–598.
11.
Novak, M., “Soil‐Pile Interaction under Dynamic Loads,” Proceedings of the Conference on Numerical Methods in Offshore Piling, ICE, London, England, 1980, pp. 59–68.
12.
Novak, M., and Aboul‐Ella, F., “Impedance Functions of Piles in Layered Media,” Journal of the Engineering Mechanics Division, ASCE, Vol. 104, No. 6, Jun., 1978, pp. 643–661.
13.
Novak, M., Aboul‐Ella, F., and Sheta, M., PILAY2—A Computer Program for Calculation of Stiffness and Damping of Piles in Layered Media, The University of Western Ontario, SACDA, London, Ont., Canada, 1981.
14.
Novak, M., and El Hifnawy, L., “Effect of Soil‐Structure Interaction on Damping of Structures,” Journal of Earthquake Engineering and Structural Dynamics, Vol. 11, 1983, pp. 595–621.
15.
Novak, M., and El Sharnouby, B., “Pile Groups under Static and Dynamic Loading,” Proceedings of the Eleventh International Conference on Soil Mechanics and Founation Engineering, San Francisco, Calif., Vol. 3, 1985, pp. 1449–1454.
16.
“Numerical Methods in Offshore Piling,” Proceedings of the 2nd International Conference, University of Texas, Austin, Tex., 1982, p. 677.
17.
O'Neill, M. W., “Group Action in Offshore Piles,” Geotechnical Practice in Offshore Engineering, ASCE, New York, N.Y., 1983.
18.
O'Neill, M. W., Ghazzaly, O. I., and Ha, H. B., “Analysis of Three‐Dimensional Pile Groups with Nonlinear Soil Response and Pile‐Soil‐Pile Interaction,” 9th Annual Offshore Technology Conference, Houston, Tex., May, 1977, pp. 245–256.
19.
Poulos, H. G., and Davis, E. H., Pile Foundation Analysis and Design, John Wiley, New York, N.Y., 1980.
20.
Poulos, H. G., and Randolph, M. K., “Pile Group Analysis: A Study of Two Methods,” Journal of Geotechnical Engineering, ASCE, Vol. 109, Mar., 1983, pp. 355–372.
21.
Randolph, M. F., and Poulos, H. G., “Estimating the Flexibility of Offshore Pile Groups,” Proceedings of 2nd International Conference on Numerical Methods in Offshore Piling, University of Texas, Austin, Tex., 1982, pp. 313–328.
22.
Sheta, M., and Novak, M., “Vertical Vibration of Pile Groups,” Journal of Geotechnical Engineering Division, ASCE, Vol. 108, No. 4, Apr., 1982, pp. 570–590.
23.
Novak, M., and Mitwally, H., “Random Response of Offshore Towers with Pile‐Soil‐Pile Interaction,” Proceedings of the 6th International Symposium on Offshore Mechanics and Arctic Engineering (OMAE), Houston, Texas, Mar., 1987, Vol. 1, pp. 329–336.
24.
Pierson, W. J., and Moskowitz, L., “A Proposed Spectral Form for Fully Developed Wind Seas Based on the Similarity Theory of S. A. Kitaigorodskii,” Journal of Geophysical Research, Vol. 69, No. 24, Dec., 1964.
Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 113 • Issue 7 • July 1987
Pages: 1065 - 1084
Copyright
Copyright © 1987 ASCE.
History
Published online: Jul 1, 1987
Published in print: Jul 1987
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