Consolidated undrained load-carrying capacity of subsea mudmats under combined loading in six degrees of freedom
Consolidated undrained load-carrying capacity of subsea mudmats under combined loading in six degrees of freedom
A generalised framework is presented for predicting the consolidated undrained capacity of rectangular mat foundations on normally consolidated soft clay under combined loading in six degrees of freedom as a function of relative preload and degree of consolidation. Consolidated undrained response is investigated by coupled small-strain finite-element analysis using the modified Cam Clay plasticity constitutive model. Increases in the load-carrying capacity of a foundation under combined loading in six degrees of freedom following vertical preload with subsequent consolidation are demonstrated and quantified. The results are presented as failure envelopes in multi-directional load space and are shown to expand proportionally as a function of degree of consolidation for a given relative preload. A methodology and a set of expressions are provided to predict the shape and size of failure envelopes for rectangular mat foundations for any degree of preloading and consolidation.
Bearing capacity, Clays, Consolidation, Failure, Footings=foundations, Offshore engineering
563-575
Feng, X.
b1a28be8-c603-4239-9c93-b2c14274e9c7
Gourvenec, S.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
1 July 2015
Feng, X.
b1a28be8-c603-4239-9c93-b2c14274e9c7
Gourvenec, S.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Feng, X. and Gourvenec, S.
(2015)
Consolidated undrained load-carrying capacity of subsea mudmats under combined loading in six degrees of freedom.
Geotechnique, 65 (7), .
(doi:10.1680/geot.14.P.090).
Abstract
A generalised framework is presented for predicting the consolidated undrained capacity of rectangular mat foundations on normally consolidated soft clay under combined loading in six degrees of freedom as a function of relative preload and degree of consolidation. Consolidated undrained response is investigated by coupled small-strain finite-element analysis using the modified Cam Clay plasticity constitutive model. Increases in the load-carrying capacity of a foundation under combined loading in six degrees of freedom following vertical preload with subsequent consolidation are demonstrated and quantified. The results are presented as failure envelopes in multi-directional load space and are shown to expand proportionally as a function of degree of consolidation for a given relative preload. A methodology and a set of expressions are provided to predict the shape and size of failure envelopes for rectangular mat foundations for any degree of preloading and consolidation.
Text
2015 Geotechnique 65_7_563-575 Feng & Gourvenec
- Accepted Manuscript
More information
Accepted/In Press date: 24 February 2015
e-pub ahead of print date: 16 June 2015
Published date: 1 July 2015
Keywords:
Bearing capacity, Clays, Consolidation, Failure, Footings=foundations, Offshore engineering
Identifiers
Local EPrints ID: 414539
URI: http://eprints.soton.ac.uk/id/eprint/414539
ISSN: 0016-8505
PURE UUID: 6f48cb25-7163-4792-87ba-7a35575c9e0f
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Date deposited: 03 Oct 2017 16:31
Last modified: 16 Mar 2024 04:31
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Author:
X. Feng
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