- Title
- Mechanical properties and binary-medium constitutive model for artificially structured soils with initially stress-induced anisotropy
- Creator
- Liu, Enlong; Wang, Shanyong; Nie, Qing
- Relation
- World Transport Convention (WTC): The Way Connecting China and the World. Proceedings of the inaugural World Transport Convention (Beijing, China 04-06 June, 2017) p. 1-12
- Relation
- http://wtc2017.csp.escience.cn/dct/page/70073
- Publisher
- World Transport Convention
- Resource Type
- conference paper
- Date
- 2017
- Description
- Triaxial compression tests were carried out on artificially structured soil samples with initially stress-induced anisotropy at confining pressures of 25 kPa, 37.5 kPa, 50 kPa, 100 kPa, 200 kPa and 400 kPa, respectively. Based on the analysis on these test results, a binary medium constitutive model for initially stress-induced structured soils was formulated here by regarding the structured soils as a binary medium consisting of bonded blocks and weakened bands. In the model, the bonded blocks are named bonded elements described by elastic-brittle materials and the weakened bands are named frictional elements described by Lade-Duncan model, respectively. Based on homogenization theory of heterogeneous materials, the non-uniformly distribution of stress and strain within a representative volume element (RVE) can be given by introducing structural parameters consisting of breakage ratio and local strain coefficient. Finally, the determination methods of model parameters were given on the basis of experimental results and verified with experimental data, which demonstrates that the new model provides satisfactory qualitative and quantitative modelling of many important features of artificially structured soils with initially stress-induced anisotropy.
- Subject
- artificially structured soils; binary medium constitutive model; breakage ratio; local strain coefficient; initially stress-induced anisotropy
- Identifier
- http://hdl.handle.net/1959.13/1391531
- Identifier
- uon:33240
- Language
- eng
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