Effect of interface condition on the undrained capacity of subsea mudmats under six-degree-of-freedom loading
Effect of interface condition on the undrained capacity of subsea mudmats under six-degree-of-freedom loading
The effect of soil–foundation interface condition on the undrained capacity of rectangular mudmat foundations under loading in six degrees of freedom is investigated. Undrained failure envelopes for mudmats with zero-tension interface have been derived from finite-element analyses, and compared with the solutions from traditional methods and established for an unlimited-tension interface condition. The zero-tension interface has minimal effect on failure envelopes in the absence of moment, but significantly reduces the load-carrying capacity of mudmats under all other load paths that include moment. The traditional method for predicting the capacity of shallow foundations under multidirectional loading generally predicts lower capacity under any combined loading condition in comparison with the finite-element results for mudmats with zero-tension interface. Algebraic expressions are proposed to describe failure envelopes for mudmats with zero-tension interface. The proposed expressions can be implemented in an automated calculation tool to enable essentially instantaneous generation of failure envelopes and optimisation of a foundation design as a function of foundation dimension or material factor.
Bearing capacity, Footings/foundations, Numerical modelling, Offshore engineering
338-349
Shen, Z.
5b6f97ac-5904-43a5-8fc6-c5bf1be90723
Feng, X.
b1a28be8-c603-4239-9c93-b2c14274e9c7
Gourvenec, S.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
1 April 2017
Shen, Z.
5b6f97ac-5904-43a5-8fc6-c5bf1be90723
Feng, X.
b1a28be8-c603-4239-9c93-b2c14274e9c7
Gourvenec, S.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Shen, Z., Feng, X. and Gourvenec, S.
(2017)
Effect of interface condition on the undrained capacity of subsea mudmats under six-degree-of-freedom loading.
Geotechnique, 67 (4), .
(doi:10.1680/jgeot.16.P.097).
Abstract
The effect of soil–foundation interface condition on the undrained capacity of rectangular mudmat foundations under loading in six degrees of freedom is investigated. Undrained failure envelopes for mudmats with zero-tension interface have been derived from finite-element analyses, and compared with the solutions from traditional methods and established for an unlimited-tension interface condition. The zero-tension interface has minimal effect on failure envelopes in the absence of moment, but significantly reduces the load-carrying capacity of mudmats under all other load paths that include moment. The traditional method for predicting the capacity of shallow foundations under multidirectional loading generally predicts lower capacity under any combined loading condition in comparison with the finite-element results for mudmats with zero-tension interface. Algebraic expressions are proposed to describe failure envelopes for mudmats with zero-tension interface. The proposed expressions can be implemented in an automated calculation tool to enable essentially instantaneous generation of failure envelopes and optimisation of a foundation design as a function of foundation dimension or material factor.
Text
2017 Geotechnique 67_4_338-349_Shen et al.
- Accepted Manuscript
More information
e-pub ahead of print date: 6 March 2017
Published date: 1 April 2017
Keywords:
Bearing capacity, Footings/foundations, Numerical modelling, Offshore engineering
Identifiers
Local EPrints ID: 414897
URI: http://eprints.soton.ac.uk/id/eprint/414897
ISSN: 0016-8505
PURE UUID: 9e55f305-0747-448e-9644-2a1f4756898d
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Date deposited: 13 Oct 2017 16:30
Last modified: 16 Mar 2024 04:31
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Author:
Z. Shen
Author:
X. Feng
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