Dynamic thermo-poro-mechanical analysis of catastrophic landslides

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dc.contributor.author Vardoulakis, I en
dc.date.accessioned 2014-03-01T01:17:45Z
dc.date.available 2014-03-01T01:17:45Z
dc.date.issued 2002 en
dc.identifier.issn 0016-8505 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/14646
dc.subject Clays en
dc.subject Dynamics en
dc.subject Failure en
dc.subject Landslides en
dc.subject Temperature effects en
dc.subject Time dependence en
dc.subject.classification Engineering, Geological en
dc.subject.classification Geosciences, Multidisciplinary en
dc.subject.other Numerical analysis en
dc.subject.other Pore pressure en
dc.subject.other Shear deformation en
dc.subject.other Thermoplastics en
dc.subject.other Thermo-pro-mechanical analysis en
dc.subject.other Landslides en
dc.subject.other dynamic analysis en
dc.subject.other landslide en
dc.subject.other pore pressure en
dc.subject.other shear band en
dc.subject.other thermomechanics en
dc.title Dynamic thermo-poro-mechanical analysis of catastrophic landslides en
heal.type journalArticle en
heal.identifier.primary 10.1680/geot. en
heal.identifier.secondary http://dx.doi.org/10.1680/geot. en
heal.language English en
heal.publicationDate 2002 en
heal.abstract In this paper a dynamic analysis is presented of the early stages of an earth slide, considering two mechanically coupled substructures: (a) the rapidly deforming shear band at the base of the slide, and (b) the accelerating (rotating) rigid body. This is done by exploiting the concepts of frictional rate softening and thermo-poro-mechanical softening of the soil, and by modifying the friction-circle method of Taylor (1948). First the equations are summarised that govern the phenomenon of heat-generated pore pressures inside a rapidly deforming shear band, and then the estimates for the various material parameters that enter the governing equations are critically discussed. In particular an attempt is made to adjust these material parameters to existing experimental data and to the properties of the clay soil responsible for the Vaiont slide of October 1963. The numerical analysis of the governing equations for the two mechanically coupled substructures leads to the following conclusions. The accelerated motion is caused by material strain-softening, which in turn feeds further material strain-rate softening inside the shear band. Owing to the speed of the initiated process, heat is trapped inside the shear band, which leads rapidly to a pore-pressure explosion in it owing to thermoplastic collapse of the clayey gouge, leading rapidly to total loss of strength and to uninhibited sliding motion on a frictionless base. en
heal.journalName Geotechnique en
dc.identifier.doi 10.1680/geot. en
dc.identifier.isi ISI:000174973500001 en
dc.identifier.volume 52 en
dc.identifier.issue 3 en
dc.identifier.spage 157 en
dc.identifier.epage 171 en

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