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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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