Estimation of Empirical Site Amplification Effects Using Observed Records

DOI Web Site Web Site 18 Citations 30 References Open Access

Bibliographic Information

Other Title
  • 経験的サイト増幅特性評価手法に関する検討
  • ケイケンテキ サイト ゾウフク トクセイ ヒョウカ シュホウ ニ カンスル ケ

Search this article

Description

A new approach to estimate site amplification effects is proposed. First, we calculate the “bed rock spectra”, adopting the omega-squared source model, frequency-dependent Q-factor, and freesurface effect. The source spectrum is given from seismic moment and corner frequency for each event, using observed records at rock site. The Q-factor is obtained from the spectral inversion analysis. The site amplification, then, is defined as the ratio of observed seismic spectra to the “bed rock spectra” at each site.<BR>We apply this method to evaluate site amplification effects in Kinki and Hokkaido regions, Japan. The results are in good agreement with those obtained from the spectral inversion analysis by TAI et al. (1994, 1995), as long as relative site amplification effects from both methods are compared. The spectral inversion method gives only site amplifications relative to a reference rock site. This method here proposed, instead, gives overall amplifications due to sedimentary layers overlying bed rock, even the site amplification effects caused by weathered layers on a rock site.

Journal

Citations (18)*help

See more

References(30)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top