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Three Dimensional Visualization of Steel Corrosion Process in RC Member Using X-Ray and Digital Image Processing

Research Project

Project/Area Number 25630198
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Structural engineering/Earthquake engineering/Maintenance management engineering
Research InstitutionWaseda University

Principal Investigator

AKIYAMA Mitsuyoshi  早稲田大学, 理工学術院, 教授 (00302191)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsX線 / 維持管理 / コンクリート構造物 / ディジタル画像処理 / 鉄筋腐食 / 塩害 / RC構造物 / ディジタル画像 / 鉄筋コンクリート / 腐食ひび割れ
Outline of Final Research Achievements

It is important to estimate the amount of corrosion products in existing RC structures subjected to chloride attack. However, the corrosion process of rebar has not been investigated because of difficulties with observing it. Recently, X-ray technology has been applied to the visualization of concrete cracking to investigate the behavior of fracture process zone in concrete. In this study, digital picture processing method to estimate the amount of corrosion products in RC members is provided for X-ray photography. Then, based on the observation of deteriorated RC member using X-ray photography, corrosion process of rebar is visualized, and the effects of the amount of corrosion products on the corrosion cracking width and flexural strength of RC beam are examined.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (9 results)

All 2014 2013 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Invited: 2 results)

  • [Journal Article] Long-term seismic performance of RC structures in an aggressive environment: emphasis on bridge piers2014

    • Author(s)
      Akiyama, M. and Frangopol, D.M.
    • Journal Title

      Structure and Infrastructure Engineering

      Volume: 10 Pages: 865-879

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Long-term seismic performance of RC structures in an aggressive environment : Emphasis on bridge piers2014

    • Author(s)
      Akiyama, M.
    • Journal Title

      Structure and Infrastructure Engineering

      Volume: (in press) Issue: 7 Pages: 865-879

    • DOI

      10.1080/15732479.2012.761246

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Experimental investigation on the relationship between the spatial variation of steel weight loss and the cracking width of RC member using X-ray photograms2014

    • Author(s)
      Lim, S., Jian, H., Akiyama, M. and Frangopol, D.M.
    • Organizer
      Proceedings of 4th International Symposium on Life-Cycle Civil Engineering
    • Place of Presentation
      東京
    • Year and Date
      2014-11-16 – 2014-11-19
    • Related Report
      2014 Annual Research Report
  • [Presentation] Correlation between Fifer Density Distribution and Flexural Capacity of SFRC Beams Using Optical Density Analysis of X-ray Image2014

    • Author(s)
      Lim, S. K., Okamoto, T., Akiyama, M., Koizumi, A.
    • Organizer
      土木学会第69回年次学術講演会
    • Place of Presentation
      大阪
    • Year and Date
      2014-09-10 – 2014-09-12
    • Related Report
      2014 Annual Research Report
  • [Presentation] 鋼繊維分布のX線撮影とSFRCはりの曲げ耐力に関する実験的研究2014

    • Author(s)
      岡本健弘,Lim, S. K., 秋山充良,小泉淳
    • Organizer
      土木学会第69回年次学術講演会
    • Place of Presentation
      大阪
    • Year and Date
      2014-09-10 – 2014-09-12
    • Related Report
      2014 Annual Research Report
  • [Presentation] Life-cycle reliability of concrete bridges under both extreme events and hazard associated with continuous deterioration2013

    • Author(s)
      Akiyama, M., and Frangopol, D.M.
    • Organizer
      IStructE Conference on Structural Engineering in Hazard Mitigation 2013
    • Place of Presentation
      Shanghai, China
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] Life-cycle design of bridges under multiple hazards: Earthquake, tsunami and continuous deterioration

    • Author(s)
      M. Akiyama, Dan M. Frangopol
    • Organizer
      11th ICOSSAR (International Conference of Structural Safety and Reliability)
    • Place of Presentation
      New York, USA
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] 鉄筋腐食量の空間的変動がRC部材の曲げ耐力に与える影響に関する実験的研究

    • Author(s)
      秋山充良,姜海涛,Lim Sopokhem
    • Organizer
      第16回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集
    • Place of Presentation
      東京,日本
    • Related Report
      2013 Research-status Report
  • [Presentation] 更新理論とマルコフ連鎖モデルを用いた鉄筋コンクリート桟橋の塩害劣化予測に関する研究

    • Author(s)
      竹中孔信,萩野統也,秋山充良,吉田郁政
    • Organizer
      土木学会第68回年次学術講演会
    • Place of Presentation
      習志野,日本
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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