Research Article
Dynamic Response of Parallel Overlapped Tunnel under Seismic Loading by Shaking Table Tests
Table 2
Similarity relations and ratios.
| | Physical parameters | Symbol and relational expression | Similarity ratio |
| Geometric parameters | Length (L) | CL | 1/100 | Linear displacement (x) | Cx = CL | 1/100 |
| Material parameters | Density (ρ) | Cρ | 1 | Stress (σ) | Cσ = CE | 1/100 | Strain (ε) | Cε | 1 | Poisson’s ratio (μ) | Cμ | 1 | Internal friction angle (ϕ) | Cϕ | 1 | Cohesion (c) | Cc = CE | 1/100 | Elastic modulus (E) | CE=CLCaCρ | 1/100 |
| Dynamic parameters | Acceleration (a) | Ca | 1 | Frequency (f) | | 1/0.1 | Velocity () | | 1/10 | Time (t) | | 1/10 |
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