Table 5 Calculation parameters in the Homand formula for cyclic shear strength of joints.
From: Shear strength deterioration effect of rock mass joint surface under cyclic shear load
\({\sigma }_{n}\) (MPa) | \({\varphi }_{b}\) | \({\sigma }_{c}\) (MPa) | \({a}_{0}\) (mm) | \({u}_{0}\) (mm) | \({k}_{a}\) | \({\theta }_{s}^{0}\) | \({u}_{max}\) (mm) |
|---|---|---|---|---|---|---|---|
0.5/1.0/2.0/3.0 | 25.3° | 40.6 | 1.76 | 10 | 0 | 10°/20° | (n + 1)*\({u}_{0}-3/4{u}_{0}\) |
