Three-dimensional modified Cam-clay model for structured soils

LI Hang-zhou; ZHANG Zhi-long; LIAO Hong-jian; SONG Li; XU Jian-teng

doi:10.11779/CJGE2022S1003

Volume 44 Issue S1

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Chinese Journal of Geotechnical Engineering > 2022 > 44(S1): 12-16. > DOI: 10.11779/CJGE2022S1003

LI Hang-zhou, ZHANG Zhi-long, LIAO Hong-jian, SONG Li, XU Jian-teng. Three-dimensional modified Cam-clay model for structured soils[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S1): 12-16. DOI: 10.11779/CJGE2022S1003

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Three-dimensional modified Cam-clay model for structured soils

Department of Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China

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Received Date: September 27, 2022
Available Online: February 06, 2023

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Abstract

Abstract

The mechanical behaviors of soils are dependent upon the structure and the stress state. Based on the unified strength theory, the unified strength parameters are proposed by introducing Lode's angle into the unified strength theory. The critical state line is modified by considering the effect of the intermediate principle stress under the framework of the critical state concept. The effects of structure are introduced into the yield function of the modified Cam-clay model. The non-associated flow law is adopted. The equation for dilatancy stress is determined. A structural constitutive model that can reflect the effects of the intermediate principal stress is proposed. The model is verified by true triaxial tests of a clay. The results show that the proposed model can predict the stress-strain relationships well.
- structure,
- constitutive model,
- critical state line,
- three-dimensional stress state

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