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dc.contributor.authorKido, Ryunosukeen
dc.contributor.authorHigo, Yosukeen
dc.contributor.alternative木戸, 隆之祐ja
dc.contributor.alternative肥後, 陽介ja
dc.date.accessioned2020-11-17T07:52:42Z-
dc.date.available2020-11-17T07:52:42Z-
dc.date.issued2020-11-
dc.identifier.issn1861-1125-
dc.identifier.issn1861-1133-
dc.identifier.urihttp://hdl.handle.net/2433/259161-
dc.description.abstractThis paper presents a set of triaxial compression tests on partially saturated dense sands to clarify the microscopic characteristics and their link to the macroscopic responses. Constant suction tests (CS tests) and constant water content tests (CW tests) are conducted under low confining pressure to observe microscopic and macroscopic behaviors of the sands associated with dilative shear bands. X-ray micro-tomography and image analysis techniques are applied to investigate the continuity as a defined index to evaluate the morphology of the pore water, the number of liquid bridges and the principal curvature of the air–water interface. The number of liquid bridges decreases for both the CS and CW tests, particularly during the strain softening process, while it decreases greater in the CW test than in the CS test. The curvature of the air–water interface remains at almost the same value under the CS test, while it tends to decrease under the CW test. The tendency of decreasing curvature corresponds to that of decreasing suction in the CW test. The peak deviator stress is higher in the CS test than in the CW test when the pore water is initially discontinuous, whereas it is identical between the two tests when the pore water is initially continuous. The residual stress is lower in the CW test than in the CS test, independent of the initial water retention states. The macroscopic responses at the different initial water retention states are qualitatively identical between poorly graded sand and well-graded sand.en
dc.format.mimetypeapplication/pdf-
dc.language.isoeng-
dc.publisherSpringer Natureen
dc.rightsThis is a post-peer-review, pre-copyedit version of an article published in 'Acta Geotechnica'. The final authenticated version is available online at: https://doi.org/10.1007/s11440-020-01049-w.en
dc.rightsThe full-text file will be made open to the public on 04 August 2021 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.en
dc.rightsこの論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。ja
dc.rightsThis is not the published version. Please cite only the published version.en
dc.subjectLiquid bridgeen
dc.subjectPartially saturated sanden
dc.subjectPrincipal curvature of air–water interfaceen
dc.subjectTriaxial compression test Water retention stateen
dc.subjectX-ray micro-tomographyen
dc.titleMicroscopic characteristics of partially saturated dense sand and their link to macroscopic responses under triaxial compression conditionsen
dc.typejournal article-
dc.type.niitypeJournal Article-
dc.identifier.jtitleActa Geotechnica-
dc.identifier.volume15-
dc.identifier.spage3055-
dc.identifier.epage3073-
dc.relation.doi10.1007/s11440-020-01049-w-
dc.textversionauthor-
dc.addressDepartment of Civil and Earth Resources Engineering, Kyoto Universityen
dc.addressDepartment of Urban Management, Kyoto Universityen
dcterms.accessRightsopen access-
datacite.date.available2021-08-04-
datacite.awardNumber17J06250-
datacite.awardNumber19K23534-
jpcoar.funderName日本学術振興会ja
jpcoar.funderName日本学術振興会ja
jpcoar.funderName.alternativeJapan Society for the Promotion of Science (JSPS)en
jpcoar.funderName.alternativeJapan Society for the Promotion of Science (JSPS)en
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