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Simple estimation method of response characteristics in surface layer based on microtremor H/V spectral ratios

Research Project

Project/Area Number 17560423
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural engineering/Earthquake engineering/Maintenance management engineering
Research InstitutionNagoya University

Principal Investigator

SAWADA Yoshihiro  Nagoya University, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (90293662)

Co-Investigator(Kenkyū-buntansha) MASAKI Kazuaki  School of Engineering, Aichi Institute of Technology, Professor, 工学部, 教授 (90078915)
NOJI Toshiyuki  School of Engineering, Fukui Institute of Technology, professor, 工学部, 教授 (00308628)
NODA Toshihiro  Nagoya University, Graduate School of Engineering, Assistant Professor, 大学院工学研究科, 助教授 (80262872)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2006: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2005: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsMicrotremor / Earthquake motion / Spectrum / Earthquake amplification / Earthquake response
Research Abstract

From the engineering viewpoint, we proposed a simple estimation method of seismic response characteristics of surface layer using the microtremor H/V spectral ratios, and verified its applicability based on the earthquake observation data.
1. We performed the analysis of observed microtremor H/V data in detail, and compared this with the earthquake H/V observed at ground surface and the transfer functions between surface and bottom. Consequently, it was confirmed that microtremor H/V approximates to the ratio of horizontal and vertical response characteristics in surface layer.
2. As for a simple estimation method of seismic response characteristics in surface layer, we judged that the method using the peak frequency and its amplitude of microtremor H/V was the appropriate, according to the result of various examinations.
3. To verify the applicability of a simple estimation method, the theoretical seismic responses based on the borehole data of KiK-net were compared with the estimation results obtained from a simple method, and also, the comparison between the response characteristics based on the observation records at Tono strong motion observation network and the strong motion observation sites in Nobi valley during the 2004 Off Kii Peninsula Earthquake and the simple estimation results were carried out. As a result, the ratios of maximum acceleration amplitude on ground surface were roughly 1.0 in the average and the standard deviations were about 0.4. Therefore, the seismic responses of the ground with from thin to thick layer are predictable in safety side by considering 1.4 times estimation result, and it can be said that the proposed method is useful for estimating the seismic response characteristics in a preliminary stage.

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (8 results)

All 2006 2005

All Journal Article (8 results)

  • [Journal Article] A simple estimation method of response characteristics in surface layer by using microtremor H/V2006

    • Author(s)
      Yoshihiro Sawada, Yuji Koyama, Daisuke Aihara
    • Journal Title

      Proceedings of 3rd International Symposium on the Effects of Surface Geology on Seismic Motion, Grenoble, France, 2006, Paper Number : 19

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Verification of applicability of microtremor array survey2006

    • Author(s)
      S.Kurahashi, K.Masaki, Y.Sawada, L.Suqun
    • Journal Title

      Proceedings of 3rd International Symposium on the Effects of Surface Geology on Seismic Motion, Grenoble, France, 2006, Paper Number : 37

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] 東濃地域の高密度地震観測点における地震応答特性と微動H/V法の適用性2006

    • Author(s)
      澤田義博, 香山雄治, 相原大介
    • Journal Title

      物理探査学会第114回学術講演論文集

      Pages: 58-61

    • NAID

      10017434364

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] A simple estimation method of response characteristics in surface layer by using microtremor H/V2006

    • Author(s)
      Yoshihiro Sawada, Yuji Koyama, Daisuke Aihara
    • Journal Title

      Proceedings of 3rd International Symposium on the Effects of Surface Geology on Seismic Motion, Grenoble, France Paper Number:19

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Verification of applicability of microtremor array survey2006

    • Author(s)
      S.Kurahashi, K.Masaki, Y.Sawada, L.Suqun
    • Journal Title

      Proceedings of 3rd International Symposium on the Effects of Surface Geology on Seismic Motion, Grenoble, France Paper Number:37

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Earthquake response characteristics of Thno high density strong motion observation network and applicability of microtremor H/V method2006

    • Author(s)
      Yoshihiro Sawada, Yuji Koyama, Daisuke Aihara
    • Journal Title

      Proceedings of 114^<th> Science lecture meeting of SEGJ paper Number 589-61

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 東濃地域の高密度強地震観測網における地震応答特性と微動H/V法の適用性2006

    • Author(s)
      澤田義博, 香山雄治, 相原大介
    • Journal Title

      物理探査学会第114回学術講演会論文集

      Pages: 13-16

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 堆積平野の基盤構造推定における微動アレー探査法の適用限界の検証2005

    • Author(s)
      倉橋奨, 正木和明, 澤田義博, 凌甦群
    • Journal Title

      日本地震学会秋季大会講演予稿集

    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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