{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1362262943970692224.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1680/geot.1984.34.3.415"}},{"identifier":{"@type":"URI","@value":"https://www.icevirtuallibrary.com/doi/pdf/10.1680/geot.1984.34.3.415"}}],"dc:title":[{"@value":"High velocity ring shear tests on sand"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p> Ring shear tests on sand materials have been carried out to show whether there is a change in the behaviour of these materials at high shearing rates and normal stresses. This question is relevant to the problem of the mobility of large rock avalanches (stürzstroms), but is also of more general academic interest. A ring shear apparatus of unusual, although simple, design has been constructed, capable of achieving circumferential velocities of 2 m/s at normal stresses of up to 200 kPa. Tests were carried out on two types of coarse sand, wet or dry, sand-rock flour mixtures and polystyrene beads. Perfect frictional behaviour was observed in all the tests, uninfluenced by either velocity or normal stress over the entire range of these variables. Change in frictional behaviour due to high rate of shearing therefore cannot be used to explain the high observed mobility of stürzstroms. </jats:p><jats:p> Des essais de cisaillement circulaire par torsion ont été effectés afin de découvrir si un changement ait lieu dans le comportement de ces matériaux sous des contraintes normales élevées. Cette question est en rapport aussi avec le probléme de la mobilité des grandes avalanches de rochers (Sturzströme), mais elle posséde également un intérêt théorique plus général. Un appareil de cisaillement circulaire par torsion de nature exceptionnelle mais simple a été construit qui peut atteindre des vitesses de 2m/s sous des contraintes normales jusqu'à 200 kPa. Des essais ont été effectués sur deux types de sable grossier, humide ou sec, des mélanges de farines de sable et de rochers et des perles de polystyrène. Dans tous ces essais on a observé un comportement de frottement parfait qui n'était influence ni par vitesse ni par la contrainte normale sur la gamme entière de ces variables. Il est par conséquent impossible de considérer que le changement dans le comportement de frottement dû à un taux élevé de cisaillement peut expliquer la haute mobilité qu'on a observé dans les avalanches de rochers (Sturzströmc). </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382262943970692225","@type":"Researcher","foaf:name":[{"@value":"O Hunger"}],"jpcoar:affiliationName":[{"@value":"Thurber Consultants Ltd, Vancouver"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943970692224","@type":"Researcher","foaf:name":[{"@value":"N. R. Morgenstern"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00168505"},{"@type":"EISSN","@value":"17517656"}],"prism:publicationName":[{"@value":"Géotechnique"}],"dc:publisher":[{"@value":"Emerald"}],"prism:publicationDate":"1984-09","prism:volume":"34","prism:number":"3","prism:startingPage":"415","prism:endingPage":"421"},"reviewed":"false","url":[{"@id":"https://www.icevirtuallibrary.com/doi/pdf/10.1680/geot.1984.34.3.415"}],"createdAt":"2009-10-20","modifiedAt":"2025-07-24","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050298355878408192","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Prediction of landslide velocity and displacement from groundwater level changes considering the shear rate-dependent friction of sliding zone soil"}]},{"@id":"https://cir.nii.ac.jp/crid/1050564285734176384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Mechanism of the slow-moving landslides in Jurassic red-strata in the Three Gorges Reservoir, China"}]},{"@id":"https://cir.nii.ac.jp/crid/1050868516582204160","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Mechanical effects of nanomaterials on the residual shear strength of dry sandy mixtures: Implication for the high mobility of rock avalanches"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004229807960064","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Shear Resistance Variations in Experimentally Sheared Mudstone Granules: A Possible Shear‐Thinning and Thixotropic Mechanism"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617520749952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Experimental study of impact of shearing velocity and effective normal stress on post-shearing permeability evolution of silica fault gouges"}]},{"@id":"https://cir.nii.ac.jp/crid/1360580232378382848","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Shear rate effect on the residual strength of saturated clayey and granular soils under low- to high-rate continuous shearing"}]},{"@id":"https://cir.nii.ac.jp/crid/1390003825178241792","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Determination of Residual Strength of Soils for Slope Stability Analysis: State of the Art Review"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282680296218752","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Field Surveys and Numerical Modeling of Pumiceous Debris Flows in Amalfi Coast (Italy)"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1680/geot.1984.34.3.415"},{"@type":"CROSSREF","@value":"10.1002/2017gl075261_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.1016/j.tecto.2020.228521_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.13101/ijece.9.179_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.1016/j.enggeo.2022.106821_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.1016/j.enggeo.2023.107361_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.1016/j.enggeo.2024.107569_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.7831/ras.8.0_46_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"},{"@type":"CROSSREF","@value":"10.1016/j.enggeo.2013.12.017_references_DOI_6aclF2S3XwOnSUP63cWXNVf5xC0"}]}