Applicability of hypoplasticity to reconstituted peat from drained triaxial tests

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10388902" target="_blank" >RIV/00216208:11310/18:10388902 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1002/nag.2840" target="_blank" >https://doi.org/10.1002/nag.2840</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/nag.2840" target="_blank" >10.1002/nag.2840</a>

Result language

angličtina

Original language name

Applicability of hypoplasticity to reconstituted peat from drained triaxial tests

Original language description

Proper understanding of the deviatoric behaviour of peats represents a challenge in soil mechanics. Exceptional high compressibility together with extremely high friction angles distinguishes peats from classical organic soils. Considerable amount of triaxial test data on peats can be found in the literature, mostly coming from standard undrained triaxial compression tests. However, only a minor part was intended to describe their prefailure behaviour. Also, limiting the investigation to the undrained response reduces the information on those ingredients of constitutive models, which are necessary to describe the deformational behaviour. This contribution aims to provide better insight into the prefailure deformational behaviour of peats, by analysing in detail the results of non-standard drained tests at various stress paths and undrained tests performed on reconstituted peat samples. Based on the experimental findings, an existing hypoplastic model, originally developed for fine-grained soils, has been adapted to capture the behaviour of peats. The model is directly calibrated on selected experimental results and validated on a variety of different stress path tests. The results reveal the merits of hypoplasticity in modelling the nonlinearity of the prefailure behaviour and the directional response of peats, which both are of great importance when assessing the serviceability limit states of geotechnical structures founded on peats.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

International Journal for Numerical and Analytical Methods in Geomechanics

ISSN

0363-9061

e-ISSN

—

Volume of the periodical

42

Issue of the periodical within the volume

17

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

2049-2064

UT code for WoS article

000449748300001

EID of the result in the Scopus database

2-s2.0-85055975362