A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region
The presence of methane hydrate in soil pores alters the stress–strain and volumetric behaviour of soil. The extent of this alteration is affected by initial temperature and pore pressure when hydrate is formed inside the thermodynamically stable region. In this paper, a state-dependent critical sta...
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ftunivsthongkong:oai:repository.hkust.edu.hk:1783.1-102906 2023-05-15T17:11:38+02:00 A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region Ng, Charles Wang Wai Baghbanrezvan, Sina Kadlicek, Tomas Zhou, Chao 2020 https://repository.hkust.edu.hk/ir/Record/1783.1-102906 https://doi.org/10.1680/jgeot.18.P.143 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=&rft.volume=&rft.issue=&rft.date=2019&rft.spage=&rft.aulast=Baghbanrezvan&rft.aufirst=Sina&rft.atitle=A+state-dependent+constitutive+model+for+methane+hydrate-bearing+sediments+inside+the+stability+region&rft.title=G%C3%A9otechnique http://www.scopus.com/record/display.url?eid=2-s2.0-85096341993&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000591769700002 English eng https://repository.hkust.edu.hk/ir/Record/1783.1-102906 Géotechnique, v. 70, (12), December 2020, p. 1094-1108 0016-8505 1751-7656 https://doi.org/10.1680/jgeot.18.P.143 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=&rft.volume=&rft.issue=&rft.date=2019&rft.spage=&rft.aulast=Baghbanrezvan&rft.aufirst=Sina&rft.atitle=A+state-dependent+constitutive+model+for+methane+hydrate-bearing+sediments+inside+the+stability+region&rft.title=G%C3%A9otechnique http://www.scopus.com/record/display.url?eid=2-s2.0-85096341993&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000591769700002 Constitutive relations Article 2020 ftunivsthongkong https://doi.org/10.1680/jgeot.18.P.143 2023-03-03T01:11:01Z The presence of methane hydrate in soil pores alters the stress–strain and volumetric behaviour of soil. The extent of this alteration is affected by initial temperature and pore pressure when hydrate is formed inside the thermodynamically stable region. In this paper, a state-dependent critical state model is developed for methane hydrate-bearing sediments (MHBS) within the theoretical framework of bounding surface plasticity. A phase parameter is newly introduced into the constitutive model to account for the coupled effects of temperature and pore pressure on the mechanical behaviour of MHBS. This unique feature of the proposed model enables it to capture the behaviour of MHBS inside the methane hydrate stability region. A non-associated flow rule is adopted and a modified dilatancy expression is proposed considering the degree of hydrate saturation, phase parameter and stress state of MHBS. To verify the new model, computed results are compared to measured results of drained triaxial tests on MHBS with different morphologies and at different effective confining stresses, degrees of hydrate saturation and phase states inside the stability region. The comparison reveals that the model is capable of capturing the key features such as the evident strain-softening behaviour due to hydrate degradation and the change in stress–strain and volumetric behaviour of MHBS at different initial conditions inside the stability region. Article in Journal/Newspaper Methane hydrate The Hong Kong University of Science and Technology: HKUST Institutional Repository Géotechnique 70 12 1094 1108 |
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Open Polar |
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The Hong Kong University of Science and Technology: HKUST Institutional Repository |
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ftunivsthongkong |
language |
English |
topic |
Constitutive relations |
spellingShingle |
Constitutive relations Ng, Charles Wang Wai Baghbanrezvan, Sina Kadlicek, Tomas Zhou, Chao A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
topic_facet |
Constitutive relations |
description |
The presence of methane hydrate in soil pores alters the stress–strain and volumetric behaviour of soil. The extent of this alteration is affected by initial temperature and pore pressure when hydrate is formed inside the thermodynamically stable region. In this paper, a state-dependent critical state model is developed for methane hydrate-bearing sediments (MHBS) within the theoretical framework of bounding surface plasticity. A phase parameter is newly introduced into the constitutive model to account for the coupled effects of temperature and pore pressure on the mechanical behaviour of MHBS. This unique feature of the proposed model enables it to capture the behaviour of MHBS inside the methane hydrate stability region. A non-associated flow rule is adopted and a modified dilatancy expression is proposed considering the degree of hydrate saturation, phase parameter and stress state of MHBS. To verify the new model, computed results are compared to measured results of drained triaxial tests on MHBS with different morphologies and at different effective confining stresses, degrees of hydrate saturation and phase states inside the stability region. The comparison reveals that the model is capable of capturing the key features such as the evident strain-softening behaviour due to hydrate degradation and the change in stress–strain and volumetric behaviour of MHBS at different initial conditions inside the stability region. |
format |
Article in Journal/Newspaper |
author |
Ng, Charles Wang Wai Baghbanrezvan, Sina Kadlicek, Tomas Zhou, Chao |
author_facet |
Ng, Charles Wang Wai Baghbanrezvan, Sina Kadlicek, Tomas Zhou, Chao |
author_sort |
Ng, Charles Wang Wai |
title |
A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
title_short |
A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
title_full |
A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
title_fullStr |
A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
title_full_unstemmed |
A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
title_sort |
state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region |
publishDate |
2020 |
url |
https://repository.hkust.edu.hk/ir/Record/1783.1-102906 https://doi.org/10.1680/jgeot.18.P.143 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=&rft.volume=&rft.issue=&rft.date=2019&rft.spage=&rft.aulast=Baghbanrezvan&rft.aufirst=Sina&rft.atitle=A+state-dependent+constitutive+model+for+methane+hydrate-bearing+sediments+inside+the+stability+region&rft.title=G%C3%A9otechnique http://www.scopus.com/record/display.url?eid=2-s2.0-85096341993&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000591769700002 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
https://repository.hkust.edu.hk/ir/Record/1783.1-102906 Géotechnique, v. 70, (12), December 2020, p. 1094-1108 0016-8505 1751-7656 https://doi.org/10.1680/jgeot.18.P.143 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=&rft.volume=&rft.issue=&rft.date=2019&rft.spage=&rft.aulast=Baghbanrezvan&rft.aufirst=Sina&rft.atitle=A+state-dependent+constitutive+model+for+methane+hydrate-bearing+sediments+inside+the+stability+region&rft.title=G%C3%A9otechnique http://www.scopus.com/record/display.url?eid=2-s2.0-85096341993&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000591769700002 |
op_doi |
https://doi.org/10.1680/jgeot.18.P.143 |
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Géotechnique |
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70 |
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12 |
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1108 |
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