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Rate-dependency of residual shear strength of soils: implications for landslide evolution

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F23%3A00572535" target="_blank" >RIV/67985891:_____/23:00572535 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11310/23:10468594

  • Result on the web

    <a href="https://doi.org/10.1680/jgele.23.00004" target="_blank" >https://doi.org/10.1680/jgele.23.00004</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1680/jgele.23.00004" target="_blank" >10.1680/jgele.23.00004</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Rate-dependency of residual shear strength of soils: implications for landslide evolution

  • Original language description

    Shear-rate weakening or strengthening behaviours can effectively control landslide runouts, defining sudden runaway sliding or years-long slow-creep phases. These behaviours are partly controlled by the properties of the basal material. Understanding its stress-strain-time response is crucial in physically-based assessments of landslide dynamics and the associated risk. We investigate the frictional resistance of a calcium bentonite, a kaolin and a quartz sand by means of a conventional ring-shear apparatus under normal stresses representative of landslide shear zones. Results for the fine-grained soils, in line with literature on pure clays, indicate important velocity strengthening, whereas small shear-rate effects were observed in sand. As long as effective stresses remain constant, a velocity strengthening response can exert a feedback that, under certain conditions, counteracts perturbations in boundary conditions and prevents fast runouts on pre-existing shear zones. Accordingly, we argue that specifically testing for shear-rate-dependency and incorporating observed behaviours in model formulations can be beneficial for better predicting landslide fates.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20701 - Environmental and geological engineering, geotechnics

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Geotechnique Letters

  • ISSN

    2049-825X

  • e-ISSN

    2045-2543

  • Volume of the periodical

    13

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    8

  • Pages from-to

    105-112

  • UT code for WoS article

    000987679900001

  • EID of the result in the Scopus database

    2-s2.0-85160347537