Počet záznamů: 1
Modelling undrained behaviour of sand with fines and fabric anisotropy
- 1.
SYSNO ASEP 0550094 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Modelling undrained behaviour of sand with fines and fabric anisotropy Tvůrce(i) Rahman, M. (AU)
Dafalias, Yannis F. (UT-L)Celkový počet autorů 2 Zdroj.dok. Acta Geotechnica. - : Springer - ISSN 1861-1125
Roč. 17, č. 6 (2022), s. 2305-2324Poč.str. 20 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova constitutive model ; critical state ; dilatancy state parameter ; fabric anisotropy ; fines ; liquefaction ; plasticity ; sand ; state parameter Vědní obor RIV JJ - Ostatní materiály Obor OECD Mechanical engineering CEP EF15_003/0000493 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UT-L - RVO:61388998 UT WOS 000729004300001 EID SCOPUS 85122140933 DOI 10.1007/s11440-021-01410-7 Anotace 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. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2023 Elektronická adresa https://link.springer.com/article/10.1007/s11440-021-01410-7
Počet záznamů: 1