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Published February 1981 | public
Journal Article

Offshore Gravity Structures: Analysis


Experimental and analytical studies are described on the offshore gravity structure foundations with their soil foundations when subjected to wave forces. The experimental tests were performed in a centrifuge at 100g centrifugal acceleration with a 10-cm diam model structure bearing on a normally consolidated deposit of Santa Barbara silt, and therfore apply to a 10-m diam prototype structure. The analytical predicitions, for the particular prototype situation considered in this study, were obtained by using a finite element program which incorporates a three-dimensional nonlinear soil model capable of describing the behavior of the Santa Barbara silt under both monotonic and cyclic loading conditions. The results of both two-dimensional (plane strain) and three-dimensional calculations are reported, and the are compared with the experimental test results obtained in the centrifuge.

Additional Information

© 1981 American Society of Civil Engineers. Discussion open until July 1, 1981. Separate discussions should be submitted for the individual papers in this sumposium. To extend the closing date one month, a written request must be filed with the Manager of Technical and Professional Publications, ASCE. Manuscript was submitted for review for possible publication on March 5, 1980. This paper is part of the Journal of the Geotechnical Engineering Division, Proceedings of the American Society of Civil Engineers. The triaxial test results (Fig.1) were provided by Fugro, Inc. (Long Beach, Calif.). The writers would also like to acknowledge with appreciation the attention and interest paid to this research project by J. C. Pearce of Chevron Oil Research Company. Part of the computer costs was covered by a grant from the California Institute of Technology Energy Research Program. This support is most gratefully appreciated.

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