Research Article
Rapid Assessment and Classification for Seismic Damage of Mountain Tunnel Based on Concentric Circle Method
Table 2
Relationship between seismic damage index and seismic damage level of tunnel.
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Standard value of 0, 1/16, 4/16, 9/16, and 1 is the area ratio of the concentric circles with different radius (0, 1, 2, 3, and 4) to the largest concentric circle with radius 4. |