Soil responses are dependent on the stress path. This property is not typically considered in traditional constitutive relations for soils. This paper summarizes an original approach to modeling these soil responses, which resorts to the most basic form of any constitutive relation - the tangent modulus. It is shown that tangent moduli need to be correctly interpreted to account for characteristics of frictional materials, which results in an anisotropic tangent matrix with different coupling moduli. Moreover, experimentally derived relations can be established for each modulus to take incremental non-linearity into account, which essentially overcomes the limitation of traditional variable moduli models in simulating plastic behavior. These ideas have led to a new type of model that is able to accurately simulate soil responses in the stress probe tests. Copyright ASCE 2007.
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Geotechnical Engineering and Engineering Geology