<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The form of incremental constitutive equations for granular soils is discussed for the triaxial configuration. The classical elasto-plastic approach and the semi-empirical model are discussed on the basis of constitutive relations determined directly from experimental data. First, the general structure of elasto-plastic constitutive equations is presented. Then, the structure of semiempirical constitutive equations is described, and a method of calibrating the model is presented. This calibration method is based on a single experiment, performed in the triaxial apparatus, which also involves a partial verification of the model, on an atypical stress path. The model is shown to give reasonable predictions. An important feature of the semi-empirical incremental model is the definition of loading and unloading, which is different from that assumed in elasto-plasticity. This definition distinguishes between spherical and deviatoric loading/unloading. The definition of deviatoric loading/unloading has been subject to some criticism. It was therefore discussed and clarified in this paper on the basis of the experiment presented.</p></abstract>

The form of incremental constitutive equations for granular soils is discussed for the triaxial configuration. The classical elasto-plastic approach and the semi-empirical model are discussed on the basis of constitutive relations determined directly from experimental data. First, the general structure of elasto-plastic constitutive equations is presented. Then, the structure of semiempirical constitutive equations is described, and a method of calibrating the model is presented. This calibration method is based on a single experiment, performed in the triaxial apparatus, which also involves a partial verification of the model, on an atypical stress path. The model is shown to give reasonable predictions. An important feature of the semi-empirical incremental model is the definition of loading and unloading, which is different from that assumed in elasto-plasticity. This definition distinguishes between spherical and deviatoric loading/unloading. The definition of deviatoric loading/unloading has been subject to some criticism. It was therefore discussed and clarified in this paper on the basis of the experiment presented.

Structure and Calibration of Constitutive Equations for Granular Soils

Institute of Hydro-Engineering IBW PAN, ul. Kościerska 7, 80-328 Gdaüsk, Poland

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Structure and Calibration of Constitutive Equations for Granular Soils"}

The form of incremental constitutive equations for granular soils is discussed for the triaxial configuration. The classical elasto-plastic approach and the...

Structure and Calibration of Constitutive Equations for Granular Soils

Published Online: Feb 28, 2015

Page range: 35 - 46

DOI: https://doi.org/10.2478/sgem-2014-0034

Keywords
granular soil, constitutive equations, triaxial conditions, pre-failure deformations

© 2014 Andrzej Sawicki et. al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Structure and Calibration of Constitutive Equations for Granular Soils

Published Online: Feb 28, 2015

Page range: 35 - 46

DOI: https://doi.org/10.2478/sgem-2014-0034

Keywordsgranular soil, constitutive equations, triaxial conditions, pre-failure deformations

© 2014 Andrzej Sawicki et. al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
granular soil, constitutive equations, triaxial conditions, pre-failure deformations