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Bridge maintenance based on actual situation by development of effective repair method and framework investigation

Research Project

Project/Area Number 19K04573
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionNagaoka University of Technology

Principal Investigator

Miyashita Takeshi  長岡技術科学大学, 工学研究科, 准教授 (20432099)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords維持管理 / 鋼橋 / 補修 / CFRP / FEA / 部分係数設計法 / 橋梁 / 炭素繊維 / モニタリング
Outline of Research at the Start

本研究では,老朽化する橋梁の維持管理に向けて,効率的な補修工法ならびに実態に即した維持管理方法の枠組みについて検討する.具体的には,前者では,炭素繊維シートによる補修工法の適用範囲の拡大に向けた検討と解析的評価手法の検討を行う.後者では,実橋でのモニタリングを通じて,実態荷重の把握とそれをふまえた活荷重係数の変更可能性の検討を行う.

Outline of Final Research Achievements

In recent years, corrosion damage has begun to be found as a damage form of bridges in areas that are not easily inspected. This study evaluated the residual load-carrying capacity and failure modes of corroded truss bridge girders through finite element analysis, referring to previous experimental results, and studied the establishment of a rational repair method using CFRP sheets.
In addition, the limit state design method is expected to be applied to CFRP-laminated steel members due to the revision of the specifications for road bridges. In this study, an analytical approach can reproduce changes in the stress reduction effect and delamination of the CFRP sheet due to the use of polyurea putty inserted in the adhesive layer between the steel and CFRP sheet, among the nonlinearities of CFRP-laminated steel members was investigated.

Academic Significance and Societal Importance of the Research Achievements

本研究で実施された腐食損傷を有する鋼トラス橋格点部を対象とした解析的検討はこれまで行われておらず,得られた残存耐荷力やCFRP接着工法に関する情報は,今後の橋梁維持管理に向けた貴重な成果と言える.また,CFRPを接着貼付した鋼部材の非線形解析についても,接着層の構成則レベルから検討し,圧縮力を受ける部材でCFRPのはく離現象を精緻に再現してることから,学術的意義も高く,限界状態設計法の確立に向けて役立つことが期待される.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (13 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Load-Carrying Capacity of Corroded Gusset Plate Connection and Its Repair Using CFRP Sheets2021

    • Author(s)
      PHAM Ngoc Vinh、Miyashita Takeshi、Ohgaki Kazuo、Okuyama Yusuke、Hidekuma Yuya、Harada Takuya
    • Journal Title

      Journal of Structural Engineering

      Volume: 147 Issue: 6 Pages: 1-18

    • DOI

      10.1061/(asce)st.1943-541x.0003030

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] CFRP SHEET REPAIR FOR STEEL GIRDER WITH CORRODED DAMAGE NEARBY CONNECTIONS2021

    • Author(s)
      TAKAMORI Atsuya、MIYASHITA Takeshi、PHAM Ngoc Vinh、HARADA Takuya、HIDEKUMA Yuya、OHGAKI Kazuo
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

      Volume: 77 Issue: 1 Pages: 165-179

    • DOI

      10.2208/jscejseee.77.1_165

    • NAID

      130008000831

    • ISSN
      2185-4653
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Repair Method and Finite Element Analysis for Corroded Gusset Plate Connections Bonded to CFRP Sheets2021

    • Author(s)
      Pham Ngoc Vinh、Miyashita Takeshi、Ohgaki Kazuo、Hidekuma Yuya、Harada Takuya
    • Journal Title

      Journal of Structural Engineering

      Volume: 147 Issue: 1 Pages: 1-22

    • DOI

      10.1061/(asce)st.1943-541x.0002862

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] NONLINEAR STRESS ANALYSIS FOR CFRP-SHEET-BONDED STEEL PLATES UNDER UNIAXIAL TENSILE LOADING2020

    • Author(s)
      PHAM Ngoc Vinh、MIYASHITA Takeshi
    • Journal Title

      Journal of JSCE

      Volume: 8 Issue: 1 Pages: 127-143

    • DOI

      10.2208/journalofjsce.8.1_127

    • NAID

      130007858273

    • ISSN
      2187-5103
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] NONLINEAR STRESS ANALYSIS FOR CFRP-SHEET-BONDED STEEL PLATES UNDER UNIAXIAL TENSILE LOADING2020

    • Author(s)
      Ngoc Vinh PHAM and Takeshi MIYASHITA
    • Journal Title

      Journal of JSCE

      Volume: -

    • NAID

      130007858273

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Load-Carrying Capacity of Corroded Gusset Plate Connection and its Repair Using CFRP Sheet2020

    • Author(s)
      Ngoc Vinh PHAM, Takeshi MIYASHITA, Kazuo OHGAKI, Yusuke OKUYAMA, Yuya HIDEKUMA and Takuya HARADA
    • Journal Title

      Journal of Structural Engineering,ASCE

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Structural health monitoring of the concrete barrier of a plate girder bridge by long term vibration monitoring with high-sensitivity MEMS accelerometers2021

    • Author(s)
      Yasunori Miyamori, Takeshi Miyashita, Takuya Daigo, Akihiro Tomioka, Yuki Shibata, Masaji Yoshinaka, Takehiko Saito
    • Organizer
      the 7th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII10)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FRP接着工法による圧縮を受けるH形断面部材の耐震補強に関する実験的検討2021

    • Author(s)
      髙森敦也,宮下剛,服部雅史,手塚渉太,長谷俊彦,秀熊裕哉,櫻井俊太,大垣賀津雄,Pham Ngoc Vinh
    • Organizer
      第76回土木学会年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 引張を受けるH形断面部材のCFRPシートによる耐震補強に関する実験的研究2021

    • Author(s)
      秀熊佑哉,櫻井俊太,大垣賀津雄,VINH PHAM NGOC,手塚渉太,服部雅史,長谷俊彦,宮下剛
    • Organizer
      第76回土木学会年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 鋼桁腹板のCFRPシートによる補強に関する解析的研究2021

    • Author(s)
      下前照,大垣賀津雄,VINH PHAM NGOC,秀熊佑哉,櫻井俊太,手塚渉太,服部雅史,長谷俊彦,宮下剛
    • Organizer
      第76回土木学会年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] CFRPシート工法により補強した鋼H形断面部材の繰返し交番載荷実験2021

    • Author(s)
      長谷俊彦,服部雅史,手塚渉太,大垣賀津雄,VINH PHAM NGOC,宮下剛,秀熊佑哉,櫻井俊太
    • Organizer
      第76回土木学会年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 鋼桁添接板近傍の腐食損傷に対するCFRP シートを用いた補修2020

    • Author(s)
      高森敦也,宮下剛,PhamNgocVinh,大垣賀津雄
    • Organizer
      第38回土木学会関東支部新潟会研究調査発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 添接板近傍に腐食損傷を有する鋼桁の曲げ耐荷力2020

    • Author(s)
      高森敦也,宮下剛,PhamNgocVinh,原田拓也,秀熊祐哉,大垣賀津雄
    • Organizer
      第75回土木学会年次学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] トラス橋下弦材格点ガセットプレート腐食部のCFRPによる補修工法に関する実験研究(その2)2020

    • Author(s)
      原田拓也,長谷俊彦,大垣賀津雄,下前照,宮下剛,Pham Ngoc Vinh,奥山雄介,秀熊佑哉,西野晶拡
    • Organizer
      第75回土木学会年次学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Remaining Capacity of Corroded Gusset Plate in Steel truss Bridge2019

    • Author(s)
      Takeshi MIYASHITA
    • Organizer
      the 12th Pacific Structural Steel Conference (PSSC2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Remaining Capacity of Corroded Gusset Plate Connection2019

    • Author(s)
      Takeshi MIYASHITA
    • Organizer
      IABSE Congress New York City
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 腐食損傷のあるトラス橋下弦材のFRP補修による圧縮強度に関する実験研究2019

    • Author(s)
      大垣賀津雄
    • Organizer
      第74回土木学会年次学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 一軸引張を受けるCFRPシートが接着された鋼板の非線形解析に関する研究2019

    • Author(s)
      Ngoc Vinh PHAM
    • Organizer
      第74回土木学会年次学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 鋼構造物連結部の炭素繊維シートによる補修2019

    • Author(s)
      J. P. Fernando
    • Organizer
      第74回土木学会年次学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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