Research Article
Study on the Safety Evaluation Method of Life-Saving Passage in Building Ruins under the Action of Aftershock
Table 3
Probability percentage (Pi) of aftershock magnitude occurrence after different main shock magnitudes within 168 hour (H).
| Main earthquake magnitude | Statistical interval (H) | Aftershock magnitude | 4.0–4.4 (%) | 4.5–4.9 (%) | 5.0–5.4 (%) | 5.5–5.9 (%) | 6.0–6.4 (%) | 6.5–6.9 (%) | 7.0–7.4 (%) | ≥7.5 |
| 6.0–6.4 | ≤12 | 53.19 | 21.28 | 25.53 | 6.38 | 2.13 | | | | ≤24 | 55.32 | 27.66 | 29.79 | 10.64 | 2.13 | | | | ≤48 | 55.32 | 34.04 | 34.04 | 12.77 | 4.26 | | | | ≤72 | 55.32 | 38.30 | 34.04 | 14.89 | 4.26 | | | | ≤96 | 55.32 | 38.30 | 34.04 | 14.89 | 4.26 | | | | ≤120 | 55.32 | 40.43 | 34.04 | 14.89 | 6.38 | | | | ≤144 | 59.57 | 40.43 | 36.17 | 14.89 | 6.38 | | | | ≤168 | 59.57 | 42.55 | 36.17 | 17.02 | 6.38 | | | |
| 6.5–6.9 | ≤12 | 89.29 | 67.86 | 21.43 | 21.43 | | | | | ≤24 | 89.29 | 67.86 | 35.71 | 25.00 | | | | | ≤48 | 92.86 | 71.43 | 35.71 | 28.57 | | | | | ≤72 | 92.86 | 71.43 | 42.86 | 28.57 | | | | | ≤96 | 92.86 | 71.43 | 42.86 | 28.57 | 3.57 | | | | ≤120 | 92.86 | 82.14 | 42.86 | 28.57 | 3.57 | | | | ≤144 | 92.86 | 85.71 | 46.43 | 28.57 | 3.57 | | | | ≤168 | 92.86 | 85.71 | 46.43 | 28.57 | 3.57 | | | |
| 7.0–7.4 | ≤12 | 100.00 | 78.57 | 64.29 | 35.71 | 7.14 | 7.14 | | | ≤24 | 100.00 | 85.71 | 64.29 | 35.71 | 7.14 | 7.14 | | | ≤48 | 100.00 | 85.71 | 71.43 | 35.71 | 14.29 | 14.29 | | | ≤72 | 100.00 | 85.71 | 71.43 | 50.00 | 21.43 | 14.29 | | | ≤96 | 100.00 | 85.71 | 85.71 | 50.00 | 21.43 | 14.29 | | | ≤120 | 100.00 | 85.71 | 85.71 | 50.00 | 21.43 | 14.29 | | | ≤144 | 100.00 | 85.71 | 85.71 | 50.00 | 21.43 | 21.43 | | | ≤168 | 100.00 | 85.71 | 85.71 | 50.00 | 21.43 | 21.43 | 7.14 | |
| ≥7.5 | ≤12 | 100.00 | 85.71 | 71.43 | 42.86 | 28.57 | 14.29 | 14.29 | | ≤24 | 100.00 | 85.71 | 85.71 | 57.14 | 28.57 | 28.57 | 28.57 | | ≤48 | 100.00 | 85.71 | 85.71 | 57.14 | 42.86 | 28.57 | 28.57 | | ≤72 | 100.00 | 85.71 | 85.71 | 57.14 | 42.86 | 28.57 | 42.86 | | ≤96 | 100.00 | 85.71 | 85.71 | 57.14 | 42.86 | 28.57 | 42.86 | | ≤120 | 100.00 | 85.71 | 85.71 | 57.14 | 42.86 | 28.57 | 42.86 | | ≤144 | 100.00 | 85.71 | 85.71 | 57.14 | 42.86 | 28.57 | 42.86 | | ≤168 | 100.00 | 85.71 | 85.71 | 57.14 | 42.86 | 28.57 | 42.86 | |
|
|