Evaluation of site response on downtown area of Namie town, Fukushima, based on microtremor and aftershock observations

• GOTO Hiroyuki

  Kyoto University

• HADA Koji

  NEWJEC Inc.

• SAWADA Sumio

  Kyoto University

• YOSHIDA Nozomu

  Tohoku Gakuin University

• OUCHI Toru

  NEWJEC Inc.

Bibliographic Information

Other Title

• 常時微動観測と臨時余震観測による福島県浪江町市街地の地盤震動特性評価

Abstract

Buildings and residential houses were severely damaged due to the ground motion at the downtown area of the Namie town, Fukushima prefecture during the 2011 off the Pacific coast of Tohoku Earthquake. Damages survey revealed that the damage ratio was not uniform even in the downtown area. In order to clarify the reason, we observed ground motions during aftershock events and microtremors in the downtown area of Namie town. The H/V spectral ratio obtained from single station observations imply that the peak frequencies uniformly distribute in the downtown area. S-wave velocity models obtained from array observations indicate low velocity in surface soil layer. Observed ground motions during the aftershocks also imply that the difference of ground motion amplification due to shallow soil layer is not significant within the downtown area.

Journal

• Journal of Japan Association for Earthquake Engineering

  Journal of Japan Association for Earthquake Engineering 16 (1), 1_309-1_321, 2016

  JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING

Keywords

• Ground motion
• Microtremor observation
• Aftershock observation
• Namie town
• the 2011 off the Pacific coast of Tohoku earthquake

Details

• CRID: 1390282680335243392
• NII Article ID: 130005123718
• DOI: 10.5610/jaee.16.1_309
• ISSN: 18846246
• Web Site: https://www.jstage.jst.go.jp/article/jaee/16/1/16_1_309/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed