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Studies on an updating procedure for efficiently estimating spatial distribution of earthquake ground motion indices fro early damage assessment

Research Project

Project/Area Number 13650525
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 構造工学・地震工学
Research InstitutionKagawa University

Principal Investigator

NODA shigeru  Kagawa University, Faculty of Engineering Professor, 工学部, 教授 (80135532)

Co-Investigator(Kenkyū-buntansha) KIYONO jyunji  Kyoto University, Graduate School of Engineering, Associate Professor, 大学院, 助教授 (00161597)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordsearly earthquake damage assessment / ground motion indices / stochastic interpolation / real-time estimation / updating algorithm / Kriging / post-earthquake emergency management / リアルタイム地震防災 / 空間情報処理 / 漸化型推定法
Research Abstract

Recently, several earthquake monitoring networks have been established in order to use earthquake information for early warning or damage assessment of urban systems. However, there is a limit to the number of seismographs that can be installed. In such a case, it is important to estimate earthquake motion by interpolation and extrapolation while taking into account the spatial distribution of seismic wave-forms and ground conditions and its uncertainty, as well as to evaluate the accuracy of the estimation.
in this paper, an updating procedure was efficiently estimating the spatial distribution of earthquake ground motion indices when a one or more observed data are sequentially available. The update equations of simple and universal kriging were derived. The characteristic values of earthquake motion follow a lognormal distribution. A simple kriging is an interpolation problem when stochastic characteristics (mean values and covariance) of earthquake motion are specified in terms of location, and a universal kriging is such a problem when the spatial change in mean values in unknown. Numerical results show that as the number of observed data increases, better estimates are recursively obtained, and at the same time the error variances reduce. It is found that this procedure offers a significant computational saving when compared to a naive kriging implementation.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 渡邊敏明: "地震動分布推定のための逐次更新法"第11回日本地震工学シンポジウム講演論文集. 2271-2276 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Toshiaki Watanabe: "Updating procedure for estimating spatial distribution of earthquake ground motion indices"The Eleventh Japan Earthquake Engineering Symposium. 2271-2276 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 渡邊 敏明: "地震動分布推定のための逐次更新法"第11回日本地震工学シンポジウム講演論文集. 2271-2276 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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