Quantifying the increase in lateral capacity of monopiles in sand due to cyclic loading
Quantifying the increase in lateral capacity of monopiles in sand due to cyclic loading
The contribution of this paper is a simple method to predict the higher moment capacity of a monopile in dense silica sand after drained cyclic loading. The method accounts for the effect of cyclic load magnitude, symmetry and number of cycles, and is calibrated against a series of single gravity and centrifuge tests. The agreement between the model test data and the predictions is typically within 2%. Application of the method shows that the moment capacity of a monopile in dense sand, for the conditions tested here, is up to 36% higher after cycling. This contrasts with a 10% reduction that would be predicted using the existing industry standard p–y approach for cyclic loading in sand.
Piles & pipelines, Repeated loading, Sands
245-252
Nicolai, G.
01afc741-27bc-4fb3-b02c-3de6c33d6dbe
Ibsen, L.B.
43a2861c-b6be-4b99-aec0-206f0c67dde3
O'Loughlin, C.D.
b0fc277d-6301-45fd-a2a5-438655f822b0
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
5 October 2017
Nicolai, G.
01afc741-27bc-4fb3-b02c-3de6c33d6dbe
Ibsen, L.B.
43a2861c-b6be-4b99-aec0-206f0c67dde3
O'Loughlin, C.D.
b0fc277d-6301-45fd-a2a5-438655f822b0
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Nicolai, G., Ibsen, L.B., O'Loughlin, C.D. and White, D.J.
(2017)
Quantifying the increase in lateral capacity of monopiles in sand due to cyclic loading.
Geotechnique Letters, 7 (3), .
(doi:10.1680/jgele.16.00187).
Abstract
The contribution of this paper is a simple method to predict the higher moment capacity of a monopile in dense silica sand after drained cyclic loading. The method accounts for the effect of cyclic load magnitude, symmetry and number of cycles, and is calibrated against a series of single gravity and centrifuge tests. The agreement between the model test data and the predictions is typically within 2%. Application of the method shows that the moment capacity of a monopile in dense sand, for the conditions tested here, is up to 36% higher after cycling. This contrasts with a 10% reduction that would be predicted using the existing industry standard p–y approach for cyclic loading in sand.
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Accepted/In Press date: 27 June 2017
e-pub ahead of print date: 5 October 2017
Published date: 5 October 2017
Keywords:
Piles & pipelines, Repeated loading, Sands
Identifiers
Local EPrints ID: 418061
URI: http://eprints.soton.ac.uk/id/eprint/418061
PURE UUID: 07b9fcc4-7822-4272-b044-e96661d62f8a
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Date deposited: 21 Feb 2018 17:30
Last modified: 18 Mar 2024 03:42
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Contributors
Author:
G. Nicolai
Author:
L.B. Ibsen
Author:
C.D. O'Loughlin
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