Abbreviations
- \(\Delta u, \, \tau , \, \gamma\) :
-
Shear deformation, shear stress and shear strain of the bedding planes
- \(J(t)\), \(\overline{J(t)}\) :
-
Creep compliance of the bedding planes and layered rock mass
- \(\varepsilon^{Tot}_{ij} , \, \varepsilon^{e}_{ij} , \, \varepsilon^{c}_{ij}\) :
-
Total strain, elastic strain, and creep strain term of the layered rock mass
- \(\delta_{ij}\) :
-
Kronecker’s delta
- \(C_{ij}\) :
-
Inverse of the stiffness matrix
- \(F_{ij} , \, F_{ijkl}\) :
-
Second- and fourth-rank tensors of the bedding planes
- \(k_{s} , \, k_{n}\) :
-
Non-dimensional parameters related to the normal and shear stiffnesses
- \(K_{n} , \, K_{s}\) :
-
Normal and shear stiffnesses of the bedding planes
- \(R_{0}\) :
-
Stiffness ratio of the normal stiffness to the shear stiffness
- \(\theta , \, N, \, s^{c} , \, r^{c}\) :
-
Angle, number, spacing, and length of the bedding planes
- \(G_{0} , \, G^{c}\) :
-
Shear modulus of the bedding planes
- \(E_{m} , \, \nu_{m}\) :
-
Elastic modulus and Poisson’s ratio of the intact rock mass
- \(\eta_{{1}}^{c} , \, \eta_{{2}}^{c}\) :
-
Coefficients of the shear viscosity of the bedding planes
- \(E_{{0}} ,E,\eta_{{1}} , \, \eta_{{2}}\) :
-
Elastic and creep parameters of layered rock
- \(\varepsilon_{11} , \, \varepsilon_{22} , \, \gamma_{12}\) :
-
Axial strain, lateral strain, and shear strain of the layered rock mass
- \(\sigma_{11} , \, \sigma_{22} , \, \sigma_{12}\) :
-
Axial stress, lateral stress, and shear stress of the layered rock mass
- \(\dot{\varepsilon }_{11} ,\;\dot{\varepsilon }_{s}\) :
-
Axial strain rate and steady-state creep rate of the layered rock mass
- \(\lambda_{i} (i = 1,2,3)\) :
-
Non-dimensional parameters to be determined by the geometric parameters of the bedding planes
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Acknowledgements
The authors gratefully acknowledge the support of China Geological Survey (Grant No.DD20190309), Key Research Program of the Chinese Academy of Sciences (Grant No.KFZD-SW-423), National Natural Science Foundation of China (Grant No. 51991392, U1806226), Hubei Provincial Natural Science Foundation of China (No. 2018ACA134), Hubei Province Innovative Research Groups (2018CFA012), and Science & Technology Research and Development Program of China Railway (No. P2018G045).
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Tian, Y., Chen, W.Z., Tian, H.M. et al. Analytical Model of Layered Rock Considering Its Time-Dependent Behaviour. Rock Mech Rock Eng 54, 5937–5944 (2021). https://doi.org/10.1007/s00603-021-02421-2
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DOI: https://doi.org/10.1007/s00603-021-02421-2