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Comparison of anisotropic rate-dependent models for modelling consolidation of soft clays

Författare och institution:
Minna Karstunen (Institutionen för bygg- och miljöteknik, Geologi och geoteknik); M. Rezania (-); N. Sivasithamparam (-); Z.-Y. Yin (-)
Publicerad i:
International Journal of Geomechanics,
ISSN:
1532-3641
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2012
Språk:
engelska
Fulltextlänk:
Fulltextlänk (lokalt arkiv):
Sammanfattning (abstract):
Two recently proposed anisotropic rate-dependent models are used to simulate the consolidation behaviour of two soft natural clays: Murro clay and Haarajoki clay. The rate-dependent constitutive models include the EVP-SCLAY1 model and the Anisotropic Creep Model (ACM). The two models are identical in the way the initial anisotropy and the evolution of anisotropy are simulated, but differ in the way the rate-effects are taken into consideration. The models are compared first at the element level against laboratory data and then at boundary value level against measured field data from instrumented embankments on Murro and Haarajoki clays. The numerical simulations suggest that at element the EVP-SCLAY1 model is able to give a better representation of the clay response under oedometric loading than ACM, when the input parameters are defined objectively. However, at boundary value level the issue is not as straightforward, and the appropriateness of the constitutive model may depend heavily on the in situ overconsolidation ratio (OCR).
Länk till sammanfattning (abstract):
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
TEKNIK OCH TEKNOLOGIER ->
Samhällsbyggnadsteknik ->
Geoteknik
Nyckelord:
anisotropy, creep, clay, rate-dependence, embankment, constitutive modelling
Chalmers styrkeområden:
Samhällsbyggnad
Postens nummer:
166086
Posten skapad:
2012-11-14 17:02
Posten ändrad:
2013-11-26 14:38

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