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A new trial of nondestructive evaluation of concrete structure by an impact elastic wave method integrating adaptive signal processing

Research Project

Project/Area Number 26630203
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionOsaka University

Principal Investigator

Kamada Toshiro  大阪大学, 工学(系)研究科(研究院), 教授 (10224651)

Co-Investigator(Kenkyū-buntansha) UCHIDA SHINYA  立命館大学, 理工学部, 講師 (70543461)
寺澤 広基  大阪大学, 工学(系)研究科(研究院), 助教 (50750246)
Co-Investigator(Renkei-kenkyūsha) TERASAWA KOKI  大阪大学, 大学院工学研究科, 助教 (50750246)
Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords衝撃弾性波 / 伝達関数 / PCグラウト充填 / 適応ノイズキャンセル処理 / 非破壊評価手法 / 内部欠陥 / 衝撃弾性波法 / 適応信号処理 / ノイズキャンセル / グラウト / 非破壊評価
Outline of Final Research Achievements

In this study, an “impact elastic wave method integrating adaptive signal processing” was developed by theoretical analysis of “adaptive noise cancelling process based on the acoustic transfer function model”. Thus, this system was applied to detect the defects in the low SN ratio region where the elastic wave reflected at the defect was far smaller than the surface wave exited by an impact. Specifically, placing a number of sensors on the concrete and using adaptive noise cancelling process for the detected signals of the sensors, the reflected wave from the defects was separated successfully by cancelling the surface wave. The main application of the method was evaluation of PC grouting condition in post-tensioning tendon ducts of PC Members. Finally, the method was found effective for these applications.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (6 results)

All 2016 2015 2014

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] 音響伝達関数を用いた衝撃弾性波法による PCグラウト充填状況の非破壊評価手法の検討2014

    • Author(s)
      服部晋一,鎌田敏郎,内田慎哉
    • Journal Title

      コンクリート構造物の補修,補強,アップグレードシンポジウム論文報告集 第14巻

      Volume: 第14巻

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] 音響伝達関数に基づくPC グラウト充填状況の評価手法の妥当性検証への衝撃応答解析の適用2016

    • Author(s)
      朝倉響,鎌田敏郎,服部晋一,内田慎哉,寺澤広基
    • Organizer
      土木学会 第71回 年次学術講演会
    • Place of Presentation
      東北大学(宮城県・仙台市)
    • Year and Date
      2016-09-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] 音響伝達関数を用いたPCグラウト部分未充填部の検出方法に関する基礎的検討2015

    • Author(s)
      服部晋一,鎌田敏郎,内田慎哉,寺澤広基,朝倉響
    • Organizer
      土木学会 第70回 年次学術講演会
    • Place of Presentation
      岡山大学(岡山県・岡山市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] Impact Elastic-Wave Method For Detection Of Grouting Condition Of Post-Tensioned Tendon Ducts In PC Members Using Acoustic Transfer Function2015

    • Author(s)
      Hattori, S., Kamada, T., Uchida, S., & Asakura, H.
    • Organizer
      The 5th Int. Conf. on Construction Materials: Performance, Innovations and Structural Implications,2015
    • Place of Presentation
      Hilton Resort & Spa at Whistler, BC, Canada
    • Year and Date
      2015-08-19
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 音響伝達関数を用いた衝撃弾性波法によるPC グラウト充填状況の非破壊評価手法の検討2014

    • Author(s)
      服部晋一,鎌田敏郎,内田慎哉,中川拓郎
    • Organizer
      土木学会 第69回 年次学術講演会
    • Place of Presentation
      大阪大学 豊中キャンパス(大阪府、豊中市待兼山町)
    • Year and Date
      2014-09-10 – 2014-09-12
    • Related Report
      2014 Research-status Report
  • [Presentation] Impact elastic-wave method for detection of grouting condition in post-tensioning tendon ducts of PC members using adaptive noise canceller2014

    • Author(s)
      Hattori, S., Kamada, T., & Uchida, S.
    • Organizer
      15th Int. Conf. European Bridge Conference on Structural Faults and Repair
    • Place of Presentation
      Imperial College, University of London. London (UK)
    • Year and Date
      2014-07-08 – 2014-07-10
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2017-05-10  

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