期刊
ACTA GEOTECHNICA
卷 17, 期 6, 页码 2173-2191出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11440-021-01348-w
关键词
Cementation; Cyclic loading; Elastoplastic constitutive model; Structure; Tensile strength
资金
- National Natural Science Foundation of China [41727802, 42072317]
- Science and Technology Project from Construction System in Jiangsu Province [2017ZD204]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
This paper proposes a new elastoplastic constitutive model to uniformly describe the mechanical behavior of cemented/non-cemented soil under different loading conditions. The model introduces a state variable characterizing the degree of cementation, and can systematically describe the effects of cementation, structure, overconsolidation, and stress-induced anisotropy on the mechanical behavior of soil. The capability of the proposed model has been validated through various tests under monotonic and cyclic loading conditions.
In this paper, an elastoplastic constitutive model is proposed to uniformly describe the mechanical behavior of cemented/ non-cemented soil under different loading conditions. A state variable characterizing the degree of cementation is introduced into the yield function of the cyclic mobility model, and an evolution rule is proposed to describe the degradation of cementation and structure. Since the cyclic mobility model is developed based on the concepts of subloading surface and superloading surface, the newly proposed model inherits both its advantages and can systematically describe the effects of cementation, structure, overconsolidation, and stress-induced anisotropy on the mechanical behavior of soil. Compared with cyclic mobility model, this proposed model adds only one state variable associated with cementation, which has clear physical meaning and can be determined by uniaxial compression or tension test. The capability of the proposed model has been validated carefully through a series of tests such as isotropic, uniaxial, and triaxial tests under monotonic and cyclic loading conditions.
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