AN ESTIMATING METHOD FOR THE AVERAGE S-WAVE VELOCITY OF GROUND FROM THE PHASE VELOCITY OF RAYLEIGH WAVE

• KONNO Katsuaki

  JAPAN SOCIETY OF CIVIL ENGINEERS

• KATAOKA Shun'ichi

  JAPAN SOCIETY OF CIVIL ENGINEERS

Bibliographic Information

Other Title

• レイリー波の位相速度から地盤の平均S波速度を直接推定する方法の提案
• レイリーハ ノ イソウ ソクド カラ ジバン ノ ヘイキン Sハ ソクド オ チョクセツ スイテイ スル ホウホウ ノ テイアン

Abstract

There is a good correlation between the time-weighted average S-wave velocity, Vs30 from surface to a depth of 30m and the amplification factor for peak velocity. The Vs30 usually is estimated from PS logging. A newly proposed method for estimating Vs30 uses a phase velocity of the Rayleigh wave obtained from the array observation of microtremors. This method bases on the phenomenon that the Vs30 is nearly equal to the phase velocity at a wavelength of 35 to 40m. In this paper, we compare the exact Vs30 and estimated Vs30 by our method at 85 sites around Tokyo. Results from calculations show that the proposed method is applicable. Furthermore, we point out that we can estimate the phase velocity at a wavelength of 35m to 40m, using a small array.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 2000 (647), 415-423, 2000-04-21

  Japan Society of Civil Engineers

Keywords

• Rayleigh wave
• phase velocity
• average S-wave velocity of ground
• amplification factor
• array observation of microtremors

Details

• CRID: 1390282680284869120
• NII Article ID: 10004544259
• NII Article ID: 10004543326
• NII Book ID: AN10014020
• DOI: 10.2208/jscej.2000.647_415
• ISSN: 18827187
• ISSN: 02897806
• ISSN: http://id.crossref.org/issn/02897806
• NDL BIB ID: 5367469
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5367469
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/2000/647/2000_647_415/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed