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dc.contributor.authorZhou, MZ
dc.contributor.authorJeng, DS
dc.contributor.authorQi, WG
dc.date.accessioned2020-09-11T05:00:48Z
dc.date.available2020-09-11T05:00:48Z
dc.date.issued2020
dc.identifier.issn0029-8018
dc.identifier.doi10.1016/j.oceaneng.2020.107597
dc.identifier.urihttp://hdl.handle.net/10072/397399
dc.description.abstractWave-induced instantaneous liquefaction is crucial to evaluating the stability of offshore foundations. For the instantaneous liquefaction, most previous studies treated the seabed as an invariant poro-elastic medium and hence led to nonphysical tensile stress in the non-cohesive liquefied zone. In this study, a penalty-like dynamic permeability model is proposed, based on the experimental evidences of permeability increase during soil liquefaction. The nonlinearity induced by the dynamic permeability is solved by an iterative procedure, based on the Newton-Raphson method. The numerical procedure is implemented in an in-house code and compared with analytical solutions under the constant permeability assumption. Numerical observations validate that the proposed dynamic permeability model can alleviate or even eliminate the nonphysical tensile stress in the instantaneously-liquefied zone. In contrast to the constant permeability model, the new model with a dynamic permeability obtains a better agreement with existing cylinder tests under one-dimensional wave loading conditions. For the numerical examples presented, the liquefaction depths predicted by constant permeability can be up to twice of those by the new dynamic permeability model. It is concluded that the conventional model with constant permeability overestimates the liquefaction potential.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom107597
dc.relation.ispartofjournalOcean Engineering
dc.relation.ispartofvolume213
dc.subject.fieldofresearchOceanography
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchMaritime engineering
dc.subject.fieldofresearchcode3708
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4015
dc.titleA new model for wave-induced instantaneous liquefaction in a non-cohesive seabed with dynamic permeability
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationZhou, MZ; Jeng, DS; Qi, WG, A new model for wave-induced instantaneous liquefaction in a non-cohesive seabed with dynamic permeability, Ocean Engineering, 2020, 213, pp. 107597
dc.date.updated2020-09-11T04:59:44Z
gro.hasfulltextNo Full Text
gro.griffith.authorJeng, Dong-Sheng


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