基于Cosserat理论的柱状节理岩体各向异性本构模型研究

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Abstract According to anisotropic mechanical properties of Baihetan columnar jointed rock masses，triangular and quadrangular prism generalized models were introduced. Based on microscopic media of a group of jointed rock masses，Cosserat extended constitutive equation was obtained by using Cosserat theory and Goodman equivalent superposition principle. Triangular and quadrangular prism columnar jointed constitutive models were established. At last，by using FLAC3D，Cosserat anisotropic constitutive model was applied to tunnel excavation numerical simulation of Baihetan columnar jointed rock masses. Variations in stresses and strains at different excavation stages and influences on engineering were comparative analyzed under isotropic and anisotropic conditions. Comparing with isotropic constitutive model，stresses in three directions of Cosserat anisotropic constitutive model have larger differences；it can reflect engineering reality better；and it is more important for design optimization of engineering.

Key words： rock mechanics anisotropy columnar jointed rock masses Cosserat anisotropic constitutive model Goodman equivalent superposition principle

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	Articles by authors
	ZHU Zhende1
	2
	QIN Tianhao2
	WANG Shihong3
	WANG Lianguo4
	SUN Linzhu1

Cite this article:

ZHU Zhende1,2,QIN Tianhao2, et al. Study oF anisotropic constitutive model of columnar jointed rock massES based on Cosserat theory[J]. , 2010, 29(S2): 4068-4076.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4068

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