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Automatic generation system of subsurface structure models by micro-tremor observation

Research Project

Project/Area Number 16510140
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Natural disaster science
Research InstitutionWaseda University

Principal Investigator

MAEDA Toshiro  Waseda University, Faculty of Science and Engineering, Professor, 理工学術院, 教授 (80329086)

Co-Investigator(Kenkyū-buntansha) HIBINO Hiroshi  Taisei Corp., Research Center, Senior Research Engineer, 技術センター, 主任研究員 (90393652)
YOSHIMURA Chiaki  Taisei Corp., Research Center, Research Engineer, 技術センター, 副主任研究員 (20374043)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsSubsurface structure / Micro-tremor observation / Surface waves / Dispersion curves / H / V spectra / Rayleigh wave
Research Abstract

In order to prevent or mitigate future earthquake disasters, precise subsurface structure models are most effective to improve earthquake risk analysis and earthquake ground motion estimates. Micro-tremor observation, which is handy and inexpensive, can be used to construct subsurface structure models ; however, micro-tremor is composed of various waves and should be supplemented by other information to construct a proper subsurface model. In this study, systematic search algorithm for an optimal subsurface model is sought, which utilizes an inverse analysis for H/V spectra and dispersion curves obtained by micro-tremor array observation.
First, we were equipped with seven portable seismographs to carry out array observation with FK analysis at Higashi-shinagawa in Tokyo and Kohoku in Yokohama, and also at Ojiya and Tokamachi where strong ground motion was observed during Niigataken Chuetsu earthquake. Parallel to these observations, we have developed inverse algorithm for multiple targets with the Neighbourhood algorithm, as well as a computer program for calculating surface wave velocities fast and stable with generalized TR matrix method up to higher Rayleigh wave normal modes.
We have,done joint inversion at those four sites and have shown the effectiveness of incorporating information of deeper layer interfaces retained in H/V spectra to that of precise shallower layering reflected in dispersion curves to improve subsurface models up to the depth of several tens of meters with urbanely realistic array radius of less than 100 meters.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (12 results)

All 2006 2005

All Journal Article (12 results)

  • [Journal Article] K-NET小千谷周辺での微動アレー観測2006

    • Author(s)
      前田寿朗
    • Journal Title

      第24回日本自然災害学会学術講演梗概集

      Pages: 5-6

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Inversion analysis on surface wave dispersion curves and H/V spectra by Neighbourhood Algorithm2005

    • Author(s)
      Eisuke Nagashima
    • Journal Title

      6th World Congresses of Structural and Multidisciplinary Optimization

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Neighbourhoodアルゴリズムによる分散曲線とH/Vスペクトルの同時逆解析2005

    • Author(s)
      長島英介
    • Journal Title

      日本建築学会大会学術講演梗概集 B-2

      Pages: 217-218

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Surface wave velocity tracking by bisection method2005

    • Author(s)
      Toshiro Maeda
    • Journal Title

      18th International Conference on Strucutral Mechanics in Reactor Techonlogy

      Pages: 91-105

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 一般化TRマトリックスを用いた表面波速度の計算方法2005

    • Author(s)
      前田寿朗
    • Journal Title

      日本建築学会大会学術講演梗概集 B-2

      Pages: 215-216

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Distribution of base rock depth estimated from Rayleigh wave measurement by forced vibration tests2005

    • Author(s)
      Hiroshi Hibino
    • Journal Title

      18th International Conference on Strucutral Mechanics in Reactor Techonlogy

      Pages: 3020-3028

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] K-NET十日町観測点周辺の微動測定2005

    • Author(s)
      前田寿朗
    • Journal Title

      日本地震工学会大会2005梗概集

      Pages: 454-455

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Simultaneous inversion on dispersion curves and H/V spectra by the Neighbourhood Algorithm2005

    • Author(s)
      Eisuke Nagashima
    • Journal Title

      Summaries of Technical Papers of Annual Meeting, Architectural Institute of JAPAN B-2

      Pages: 217-218

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Computation of surface wave velocities by generalized transmission and reflection matrix method2005

    • Author(s)
      Toshiro Maeda
    • Journal Title

      Summaries of Technical Papers of Annual Meeting, Architectural Institute of JAPAN B-2

      Pages: 215-216

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Micro-tremor array observation around K-NET Ojiya station2005

    • Author(s)
      Toshiro Maeda
    • Journal Title

      Summaries of Technical Papers of 24^<th> Annual Meeting, Japan Society for Natural Disaster Science

      Pages: 5-6

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Micro-tremor observation around K-NET Tokamachi station2005

    • Author(s)
      Toshiro Maeda
    • Journal Title

      Proceedings of the 4^<th> Annual Meeting of Japan Association for Earthquake Engineering

      Pages: 454-455

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] K-NET小千谷周辺での微動アレー観測2005

    • Author(s)
      前田寿朗
    • Journal Title

      第24回日本自然災害学会学術講演会講演梗概集

      Pages: 5-6

    • Related Report
      2005 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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