Research Article
Benefits of Seismic Isolation for Nuclear Structures Subjected to Severe Earthquake
| Mode | [Hz] | Modal shape | Fis [Hz] | Modal shape |
| 1 | 5.91 | “cantilever” mode in z direction | 0.497 | “cantilever” mode in z direction | 2 | 6.24 | “cantilever” mode in x direction | 0.498 | “cantilever” mode in x direction | 3 | 10.09 | “cantilever” mode in x direction | 1.386 | Torsion around y axis | 4 | 12.14 | “cantilever” mode in z direction | 6.21 | “cantilever” mode in x direction | 5 | 12.31 | Torsion around z axis | 6.89 | “cantilever” mode in z direction | 6 | 13.49 | Vertical | 10.19 | Torsion around z axis | 7 | 14.45 | Vertical | 13.08 | Vertical | 8 | 14.45 | Shell bending mode around y axis | 13.50 | Vertical | 9 | 15.05 | Shell bending mode around y axis | 13.86 | Shell Bending mode around y axis | 10 | 15.22 | Shell Bending mode around the y-axis | 14.83 | Shell Bending mode around the y-axis |
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