Review Article
Survey on Major Worldwide Regulations on Seismic Base Isolation of Buildings
Table 10
Site effects (the USA) in the long period range [
12,
22].
| | Soil type/S1 | | | ≤0.10 | = 0.2 | = 0.30 | = 0.4 | = 0.5 | ≥0.5 | ≥0.6 |
| | A | 0.8/0.8 | 0.8/0.8 | 0.8/0.8 | 0.8/0.8 | N.A./0.8 | 0.8/N.A. | N.A./0.8 | | B | 1.0/0.8 | 1.0/0.8 | 1.0/0.8 | 1.0/0.8 | N.A./0.8 | 1.0/N.A. | N.A./0.8 | | C | 1.7/1.5 | 1.6/1.5 | 1.5/1.5 | 1.4/1.5 | N.A./1.5 | 1.3/N.A. | N.A./1.4 | | D | 2.4/2.4 | 2.0/2.2 | 1.8/2.0 | 1.6/1.9 | N.A./1.8 | 1.5/N.A. | N.A./1.7 | | E | 3.5/4.2 | 3.2/3.3 | 2.8/2.8 | 2.4/2.2 | N.A./2.2 | 2.4/N.A. | N.A./2.0 |
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