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Modelling of the lateral loading of bucket foundations in sand using hydro-mechanical interface elements

Modelling of the lateral loading of bucket foundations in sand using hydro-mechanical interface elements
Modelling of the lateral loading of bucket foundations in sand using hydro-mechanical interface elements
Behaviour of offshore foundations such as piles or bucket foundations is highly dependent on interface properties. Shear mobilisation along their boundaries is crucial, not only under tension but also lateral loading. Gap opening plays an important role to develop the suction effect under bucket foundations. Offshore foundation behaviour is often computed in purely drained (long-term) or undrained (short-term) conditions. However, dissipation of over-/under- water pressures may dissipate fast especially in sand. Subsequently in some cases the true behaviour is not purely drained nor purely undrained, but partially drained. We developed a hydro-mechanically coupled finite element of interface able to reproduce loss of contact, friction mobilisation (Coulomb criterion), sliding, water flow along the interface and through it. Hydro-mechanical couplings arise from the definition of an effective stress, the dependence of longitudinal flow and storage to gap opening. A bucket foundation is modelled upon lateral loading to illustrate the capabilities of the finite elements as well as the effects of couplings on the overall caisson behaviour.
CRC Press / Balkema
Cerfontaine, B.
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Charlier, R.
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Collin, F.
25bc20db-f8c2-48fe-85e1-373eb91a94eb
Cardoso, António S.
fc262a89-a766-4ac1-b031-8158a076003b
Borges, José L.
06eeeef1-bad5-47cf-b864-50f09978b287
Costa, Pedro A.
a7affb6f-56f7-4fe0-83b9-b7c779fcb9c6
Gomes, António T.
dac3c9c8-3c2c-4685-b043-4abb5f5f91dd
Marques, José C.
df75838e-2ce1-415f-9cda-b957538b5321
Vieira, Castorina S.
2a48d481-891d-4a1b-adc5-16a4d81c5aff
Cerfontaine, B.
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Charlier, R.
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Collin, F.
25bc20db-f8c2-48fe-85e1-373eb91a94eb
Cardoso, António S.
fc262a89-a766-4ac1-b031-8158a076003b
Borges, José L.
06eeeef1-bad5-47cf-b864-50f09978b287
Costa, Pedro A.
a7affb6f-56f7-4fe0-83b9-b7c779fcb9c6
Gomes, António T.
dac3c9c8-3c2c-4685-b043-4abb5f5f91dd
Marques, José C.
df75838e-2ce1-415f-9cda-b957538b5321
Vieira, Castorina S.
2a48d481-891d-4a1b-adc5-16a4d81c5aff

Cerfontaine, B., Charlier, R., Collin, F., Cardoso, António S., Borges, José L., Costa, Pedro A., Gomes, António T., Marques, José C. and Vieira, Castorina S. (2018) Modelling of the lateral loading of bucket foundations in sand using hydro-mechanical interface elements. In 9th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2018. CRC Press / Balkema. 10 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Behaviour of offshore foundations such as piles or bucket foundations is highly dependent on interface properties. Shear mobilisation along their boundaries is crucial, not only under tension but also lateral loading. Gap opening plays an important role to develop the suction effect under bucket foundations. Offshore foundation behaviour is often computed in purely drained (long-term) or undrained (short-term) conditions. However, dissipation of over-/under- water pressures may dissipate fast especially in sand. Subsequently in some cases the true behaviour is not purely drained nor purely undrained, but partially drained. We developed a hydro-mechanically coupled finite element of interface able to reproduce loss of contact, friction mobilisation (Coulomb criterion), sliding, water flow along the interface and through it. Hydro-mechanical couplings arise from the definition of an effective stress, the dependence of longitudinal flow and storage to gap opening. A bucket foundation is modelled upon lateral loading to illustrate the capabilities of the finite elements as well as the effects of couplings on the overall caisson behaviour.

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Published date: 27 December 2018

Identifiers

Local EPrints ID: 444213
URI: http://eprints.soton.ac.uk/id/eprint/444213
PURE UUID: d230f45d-9b78-49ae-b754-a7586adc1602
ORCID for B. Cerfontaine: ORCID iD orcid.org/0000-0002-4833-9412

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Date deposited: 01 Oct 2020 16:34
Last modified: 18 Feb 2021 17:42

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Contributors

Author: B. Cerfontaine ORCID iD
Author: R. Charlier
Author: F. Collin
Author: António S. Cardoso
Author: José L. Borges
Author: Pedro A. Costa
Author: António T. Gomes
Author: José C. Marques
Author: Castorina S. Vieira

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