Research Article
Effect of Near-Fault Pulsed Ground Motions on Seismic Response and Seismic Performance to Tunnel Structures
Table 8
Failure probabilities under fortification standards responding to different ground motions.
| Ground motions | Fortification standards | Failure probability (%) | Intact | Slightly damaged | Moderately damaged | Severely damaged |
| Near-fault pulsed ground motions | VIII frequent | 44.99 | 45.89 | 3.53 | 5.59 | VIII basis | 1.07 | 33.25 | 7.98 | 57.70 | VIII rare | 0.02 | 8.11 | 3.10 | 88.77 | VIII extremely rare | 0.00 | 1.76 | 0.62 | 97.62 |
| Far-field ground motions | VIII frequent | 65.04 | 33.36 | 1.26 | 0.34 | VIII basis | 1.21 | 44.40 | 13.07 | 41.32 | VIII rare | 0.01 | 8.08 | 3.37 | 88.54 | VIII extremely rare | 0.00 | 2.62 | 1.19 | 96.19 |
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