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Observed and predicted behaviour of rail ballast under monotonic loading capturing particle breakage

Journal Article


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Abstract


  • A substantial amount of experimental evidence suggests that the critical state envelope for ballast is nonlinear,

    especially at low confining pressure. To study the implications of this nonlinearity and the associated role of particle breakage,

    monotonically loaded drained triaxial tests were conducted using a large-scale cylindrical triaxial apparatus. A nonlinear critical

    state envelope is determined in the q–p= and –lnp= planes. Mathematical expressions for critical state stress ratio and specific

    volume are proposed to incorporate the evolution of particle breakage during monotonic shearing. In this paper, an elastoplastic

    constitutive model based on the critical state soil mechanics framework is presented to capture the salient aspects of stress–

    strain behaviour and degradation of ballast. Constitutive parameters were conveniently determined from large-scale laboratory

    tests. The model is able to predict the monotonic shear behaviour of ballast corroborating with the laboratory measurements.

    The proposed model is further validated using experimental results available from past independent studies.

Publication Date


  • 2015

Citation


  • Indraratna, B., Sun, Q. & Nimbalkar, S. (2015). Observed and predicted behaviour of rail ballast under monotonic loading capturing particle breakage. Canadian Geotechnical Journal, 52 (1), 73-86.

Scopus Eid


  • 2-s2.0-84913547522

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4798&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3779

Has Global Citation Frequency


Number Of Pages


  • 13

Start Page


  • 73

End Page


  • 86

Volume


  • 52

Issue


  • 1

Place Of Publication


  • Canada

Abstract


  • A substantial amount of experimental evidence suggests that the critical state envelope for ballast is nonlinear,

    especially at low confining pressure. To study the implications of this nonlinearity and the associated role of particle breakage,

    monotonically loaded drained triaxial tests were conducted using a large-scale cylindrical triaxial apparatus. A nonlinear critical

    state envelope is determined in the q–p= and –lnp= planes. Mathematical expressions for critical state stress ratio and specific

    volume are proposed to incorporate the evolution of particle breakage during monotonic shearing. In this paper, an elastoplastic

    constitutive model based on the critical state soil mechanics framework is presented to capture the salient aspects of stress–

    strain behaviour and degradation of ballast. Constitutive parameters were conveniently determined from large-scale laboratory

    tests. The model is able to predict the monotonic shear behaviour of ballast corroborating with the laboratory measurements.

    The proposed model is further validated using experimental results available from past independent studies.

Publication Date


  • 2015

Citation


  • Indraratna, B., Sun, Q. & Nimbalkar, S. (2015). Observed and predicted behaviour of rail ballast under monotonic loading capturing particle breakage. Canadian Geotechnical Journal, 52 (1), 73-86.

Scopus Eid


  • 2-s2.0-84913547522

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4798&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3779

Has Global Citation Frequency


Number Of Pages


  • 13

Start Page


  • 73

End Page


  • 86

Volume


  • 52

Issue


  • 1

Place Of Publication


  • Canada