Research Article
Effects of Structural and Seismic Factors on the Constant-Strength Ductility Spectra Based on NGA-West2 Database
Table 2
Classification results of ground motion records based on USGS site classification.
| Site type | Classification standard Vs30 (m/s) | Number 1 | Site type | Number 2 |
| Site A type | >1500 | 7 | Stiff soil | 2850 | Site B type | 760∼1500 | 101 | Site C type | 360∼760 | 2742 | Site D type | 180∼360 | 2533 | Soft soil | 2685 | Site E type | <180 | 152 |
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