Abstract
Based on the quarter-wavelength approximation, the frequency-dependent site amplifications, A(f ), at 18 free-field strong-motion stations in and near the Taipei Basin are evaluated from well-logging data. The V 30, which is the average of the S-wave velocities in the topmost 30 m, is a significant factor in classifying the sites. Results show that the site amplifications at all sites in study are larger than 1 and functions of frequency. Compared with the Haskell method, the quarter-wavelength approximation is almost an average and a good representation of overall amplifications. It is noted that the site amplifications evaluated in this study can apply only to frequencies greater than about 1.1 Hz for class C sites and 3.1 Hz for class D.
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Huang, MW., Wang, JH., Hsieh, HH. et al. High frequency site amplification evaluated from Borehole data in the Taipei Basin. J Seismol 13, 601–611 (2009). https://doi.org/10.1007/s10950-009-9153-3
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DOI: https://doi.org/10.1007/s10950-009-9153-3