Offshore Gravity Structures: Analysis

by Jean H. Prevost, (M.ASCE), Asst. Prof. of Civ. Engrg.; Princeton Univ., Princeton, N.J.,
Ronald F. Scott, (M.ASCE), Prof. of Civ. Engrg.; California Inst. of Tech., Pasadena, Calif.,
Thomas J.R. Hughes, (M.ASCE), Assoc. Prof. Of Structural Mechanics; California Inst. of Tech., Pasadena, Calif.,
Bernard Cuny, Grad. Student; California Inst. of Tech., Pasadena, Calif.,


Serial Information: Journal of the Geotechnical Engineering Division, 1981, Vol. 107, Issue 2, Pg. 143-165


Document Type: Journal Paper

Abstract: 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.

Subject Headings: Soil analysis | Offshore structures | Structural analysis | Model tests | Consolidated soils | Silt | Finite element method

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