Comparison of two fine sands under torsional loading

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dc.contributor.author Georgiannou, VN en
dc.contributor.author Tsomokos, A en
dc.date.accessioned 2014-03-01T01:28:03Z
dc.date.available 2014-03-01T01:28:03Z
dc.date.issued 2008 en
dc.identifier.issn 0008-3674 en
dc.identifier.uri http://hdl.handle.net/123456789/18688
dc.subject Laboratory tests en
dc.subject Liquefaction en
dc.subject Sands en
dc.subject Stiffness en
dc.subject Torsional shear en
dc.subject.classification Engineering, Geological en
dc.subject.classification Geosciences, Multidisciplinary en
dc.subject.other Cyclic loadings en
dc.subject.other Damping characteristics en
dc.subject.other Fine sand en
dc.subject.other Hollow cylinder apparatus en
dc.subject.other Hollow cylinders en
dc.subject.other Laboratory tests en
dc.subject.other Monotonic and cyclic loading en
dc.subject.other Monotonic loading en
dc.subject.other Phase transformation en
dc.subject.other Phase transformation line en
dc.subject.other Pore-water pressures en
dc.subject.other Strength reduction en
dc.subject.other Stress ratio en
dc.subject.other Torsional loadings en
dc.subject.other Torsional shear en
dc.subject.other Undrained en
dc.subject.other Void ratios en
dc.subject.other Cyclic loads en
dc.subject.other Cylinders (shapes) en
dc.subject.other Damping en
dc.subject.other Liquefaction en
dc.subject.other Shear strain en
dc.subject.other Shear strength en
dc.subject.other Steel structures en
dc.subject.other Stiffness en
dc.subject.other Testing en
dc.subject.other Sand en
dc.subject.other comparative study en
dc.subject.other fine grained sediment en
dc.subject.other laboratory method en
dc.subject.other liquefaction en
dc.subject.other loading test en
dc.subject.other porewater en
dc.subject.other sand en
dc.subject.other stiffness en
dc.subject.other strength en
dc.subject.other stress en
dc.subject.other torsion en
dc.title Comparison of two fine sands under torsional loading en
heal.type journalArticle en
heal.identifier.primary 10.1139/T08-083 en
heal.identifier.secondary http://dx.doi.org/10.1139/T08-083 en
heal.language English en
heal.publicationDate 2008 en
heal.abstract In this paper the behaviour of two ''standard research sands'', widely used for experimental purposes, is compared in a torsional hollow cylinder apparatus under monotonic and cyclic loading conditions. Both sands are fine and uniform with D50 = 0.22 and 0.29 mm, respectively. However, their response to undrained monotonic loading at similar void ratios is dramatically different, with the finer sand showing strength reduction after peak and the coarser sand showing continuous increase in strength with torsional shear. The difference in response is mainly attributed to grain angularity and to a lesser degree to their grading. The results of drained torsional hollow cylinder tests show initial contraction followed by dilation. The stress ratio at phase transformation is uniquely defined by both drained and undrained tests for each sand. Cyclic loading instability is manifested by a sudden increase in shear strain and excess pore-water pressure leading to initial liquefaction. The instability initiates across the instability line for the sand showing strength reduction and across the phase transformation line for the sand showing continuous increase in strength with shearing. Both lines are defined under monotonic loading conditions. The liquefaction, stiffness, and damping characteristics of the sands are given in this paper. © 2008 NRC Canada. en
heal.journalName Canadian Geotechnical Journal en
dc.identifier.doi 10.1139/T08-083 en
dc.identifier.isi ISI:000261909600002 en
dc.identifier.volume 45 en
dc.identifier.issue 12 en
dc.identifier.spage 1659 en
dc.identifier.epage 1672 en

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