Modelling undrained behaviour of sand with fines and fabric anisotropy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F22%3A00550094" target="_blank" >RIV/61388998:_____/22:00550094 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11440-021-01410-7" target="_blank" >https://link.springer.com/article/10.1007/s11440-021-01410-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11440-021-01410-7" target="_blank" >10.1007/s11440-021-01410-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling undrained behaviour of sand with fines and fabric anisotropy

Popis výsledku v původním jazyce

Fabric anisotropy and fines content (f(c)) in sands modify significantly their mechanical behaviour, particularly as related to static liquefaction under undrained conditions. The fabric anisotropy aspect, expressed by means of an evolving fabric tensor F, has been addressed in the recently developed Anisotropic Critical State Theory (ACST) that enhances the two critical state conditions on stress ratio (eta) and void ratio (e) of the classical Critical State Theory by an additional condition on the critical state value of F in relation to loading direction, based on this concept it introduces the dependence of dilatancy on fabric anisotropy. Various models have been successfully developed within this framework for clean sands. The f(c) aspect has been addressed within the Equivalent Granular State Theory (EGST) that substitutes a properly defined equivalent granular void ratio (e*) for e in any model for clean sand in order to obtain the response of sand with fines without any other change of the model structure and constants. Along these lines, a constitutive model is constructed in this work in order to address the effect of both F and f(c) simultaneously, by a combination of these two powerful propositions. The idea is very simple: one takes a constitutive model developed within ACST for clean sands, hence it accounts for fabric anisotropy, and substitutes the e* for e, as well as the derivative quantities of such substitution, hence it accounts for f(c). The result yields a model that can simulate data on the undrained response for a range of f(c), with emphasis on static liquefaction. It is shown that the inclusion of fabric anisotropy improves previous similar simulations made within the EGST but without the framework of ACST.

Název v anglickém jazyce

Modelling undrained behaviour of sand with fines and fabric anisotropy

Popis výsledku anglicky

Fabric anisotropy and fines content (f(c)) in sands modify significantly their mechanical behaviour, particularly as related to static liquefaction under undrained conditions. The fabric anisotropy aspect, expressed by means of an evolving fabric tensor F, has been addressed in the recently developed Anisotropic Critical State Theory (ACST) that enhances the two critical state conditions on stress ratio (eta) and void ratio (e) of the classical Critical State Theory by an additional condition on the critical state value of F in relation to loading direction, based on this concept it introduces the dependence of dilatancy on fabric anisotropy. Various models have been successfully developed within this framework for clean sands. The f(c) aspect has been addressed within the Equivalent Granular State Theory (EGST) that substitutes a properly defined equivalent granular void ratio (e*) for e in any model for clean sand in order to obtain the response of sand with fines without any other change of the model structure and constants. Along these lines, a constitutive model is constructed in this work in order to address the effect of both F and f(c) simultaneously, by a combination of these two powerful propositions. The idea is very simple: one takes a constitutive model developed within ACST for clean sands, hence it accounts for fabric anisotropy, and substitutes the e* for e, as well as the derivative quantities of such substitution, hence it accounts for f(c). The result yields a model that can simulate data on the undrained response for a range of f(c), with emphasis on static liquefaction. It is shown that the inclusion of fabric anisotropy improves previous similar simulations made within the EGST but without the framework of ACST.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/EF15_003%2F0000493" target="_blank" >EF15_003/0000493: Centrum pro výzkum nelineárního dynamického chování pokročilých materiálů ve strojírenství (CeNDYNMAT)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Acta Geotechnica

ISSN

1861-1125

e-ISSN

1861-1133

Svazek periodika

17

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

20

Strana od-do

2305-2324

Kód UT WoS článku

000729004300001

EID výsledku v databázi Scopus

2-s2.0-85122140933