Research Article
Failure Characteristics of Joint Bolts in Shield Tunnels Subjected to Impact Loads from a Derailed Train
Table 8
Bolt failure behavior under different train running speeds.
| | Joint bolt number | Failure type | Failure time | Failure sequence | | 200 km/h | 250 km/h | 300 km/h | 200 km/h | 250 km/h | 300 km/h | 200 km/h | 250 km/h | 300 km/h |
| | A | Tensile | Tensile | Tensile | 4.02 | 3.65 | 3.28 | 1 | 1 | 1 | | B | Shear | Shear | Shear | 4.85 | 4.59 | 4.04 | 3 | 3 | 3 | | C | Shear | Shear | Shear | 6.14 | 5.56 | 4.79 | 5 | 5 | 5 | | F | Shear | Shear | Shear | 4.68 | 4.40 | 3.89 | 2 | 2 | 2 | | E | Shear | Shear | Shear | 6.01 | 5.46 | 4.69 | 4 | 4 | 4 | | G | Shear | Shear | Shear | 15.45 | 13.52 | 11.75 | 6 | 6 | 6 |
| | Average failure time | | 6.86 | 6.20 | 5.41 | | | |
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