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Study on the constitutive model for jointed rock mass.

Xu Q, Chen J, Li J, Zhao C, Yuan C - PLoS ONE (2015)

Bottom Line: The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses.Some numerical examples are given to analyze and verify the proposed constitutive model.The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

View Article: PubMed Central - PubMed

Affiliation: School of Civil and Hydraulic Eng., Dalian University of Technology, Dalian, China.

ABSTRACT
A new elasto-plastic constitutive model for jointed rock mass, which can consider the persistence ratio in different visual angle and anisotropic increase of plastic strain, is proposed. The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses. Some numerical examples are given to analyze and verify the proposed constitutive model. The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

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Related in: MedlinePlus

The rock mass samples containing joints[18] ((a)The first rock mass sample containing joints (the visual angles β0 of joints = 0°);(b)The second rock mass sample containing joints (the visual angles β0 of joints = 30°))
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pone.0121850.g009: The rock mass samples containing joints[18] ((a)The first rock mass sample containing joints (the visual angles β0 of joints = 0°);(b)The second rock mass sample containing joints (the visual angles β0 of joints = 30°))

Mentions: To verify proposed constitutive model, the compared results of proposed model and experiment are given. The rock mass samples containing joints are 0.3m×0.3m. The visual angles β0 of joints of two rock mass samples are 0°and 30°,respectively. And the positions of joints are shown in Fig 9. The boundary conditions and numerical model are shown in Fig 10. The normal stress is 1.0MPa, and the shear displacements of experiment are taken to 5mm. The parameters of the joints and the rock mass samples are shown in Table 2.


Study on the constitutive model for jointed rock mass.

Xu Q, Chen J, Li J, Zhao C, Yuan C - PLoS ONE (2015)

The rock mass samples containing joints[18] ((a)The first rock mass sample containing joints (the visual angles β0 of joints = 0°);(b)The second rock mass sample containing joints (the visual angles β0 of joints = 30°))
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4401509&req=5

pone.0121850.g009: The rock mass samples containing joints[18] ((a)The first rock mass sample containing joints (the visual angles β0 of joints = 0°);(b)The second rock mass sample containing joints (the visual angles β0 of joints = 30°))
Mentions: To verify proposed constitutive model, the compared results of proposed model and experiment are given. The rock mass samples containing joints are 0.3m×0.3m. The visual angles β0 of joints of two rock mass samples are 0°and 30°,respectively. And the positions of joints are shown in Fig 9. The boundary conditions and numerical model are shown in Fig 10. The normal stress is 1.0MPa, and the shear displacements of experiment are taken to 5mm. The parameters of the joints and the rock mass samples are shown in Table 2.

Bottom Line: The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses.Some numerical examples are given to analyze and verify the proposed constitutive model.The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

View Article: PubMed Central - PubMed

Affiliation: School of Civil and Hydraulic Eng., Dalian University of Technology, Dalian, China.

ABSTRACT
A new elasto-plastic constitutive model for jointed rock mass, which can consider the persistence ratio in different visual angle and anisotropic increase of plastic strain, is proposed. The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses. Some numerical examples are given to analyze and verify the proposed constitutive model. The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

Show MeSH
Related in: MedlinePlus