Thermal and Shear-Rate Effects in Landslides: From the Classics to the Future

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10488840" target="_blank" >RIV/00216208:11310/24:10488840 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/978-981-99-9057-3_6" target="_blank" >https://doi.org/10.1007/978-981-99-9057-3_6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-981-99-9057-3_6" target="_blank" >10.1007/978-981-99-9057-3_6</a>

Result language

angličtina

Original language name

Thermal and Shear-Rate Effects in Landslides: From the Classics to the Future

Original language description

The frictional resistance of geomaterials upon localized shearing has been shown to depend on the rate of shearing. Both weakening and strengthening phenomena have been observed, and mechanisms have been proposed which take the mineralogy and stress level into account. Evidence also exists that temperature plays an important role in defining the frictional resistance as well as its dependence on the shear rate. Temperature and rate-dependent mechanisms can indeed control landslide runouts, yielding runaway sliding or prolonged slow creep displacements. We reviewed the classic literature on the matter and noted that, while studies on shear-rate effects are abundant, systematic classifications useful in predicting landslide fates in a variety of lithologies and environments are lacking. As for thermal effects, these are well studied with respect to large and fast-runout landslides, where frictional heating plays a major role. Conversely, little is known about changes in slope stability (prior to failure, remobilization, or reactivation) in relation to changes in ground temperature caused by varying boundary conditions, such as changes in groundwater temperature or heat transfer from the surface under seasonal or long-term climatic changes. Results of our preliminary experiments, targeting clay-rich materials, demonstrate an important effect of temperature on the residual shear strength, which is coupled with changes in shear-rate response. Catchment-scale statistical analyses also reveal that surface temperature can be correlated with landslide activity in space and time. We conclude by suggesting that landslide modelling approaches in the future should account for thermal and shear-rate effects. In physically-based modelling, this may be achieved via coupled thermo-hydro-mechanical formulations, in which the constitutive model includes a time-dependent (e.g., thermo-viscous) component.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10505 - Geology

Project

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

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

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

Article name in the collection

Engineering Geology for a Habitable Earth: IAEG XIV Congress 2023 Proceedings Vol. 1, Chengdu, China

ISBN

978-981-9990-56-6

ISSN

1863-5520

e-ISSN

1863-5539

Number of pages

12

Pages from-to

71-82

Publisher name

Springer Nature

Place of publication

Cham

Event location

Chengdu, China

Event date

Sep 21, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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