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Research on the influence of liquid water on fatigue deterioration of embedded joint in corrugated steel web PC bridge and development of effective countermeasures

Research Project

Project/Area Number 16H06096
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionTokyo Institute of Technology

Principal Investigator

Chijiwa Nobuhiro  東京工業大学, 環境・社会理工学院, 准教授 (80546242)

Research Collaborator IWANAMI Mitsuyasu  
SASAKI Eiichi  
TAMURA Hiroshi  
SHINOZAKI Hiroo  
SAITO Tomohisa  
MAEKAWA Koichi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥25,350,000 (Direct Cost: ¥19,500,000、Indirect Cost: ¥5,850,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2016: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Keywords液状水 / 波形鋼板ウェブPC橋梁 / 接合部 / 繰り返し荷重作用 / 波形鋼板ウェブPC橋 / 波形鋼板ウェブ橋梁 / 疲労 / 波形鋼鈑ウェブ橋 / スラッジ化 / 波形鋼板ウェブ橋 / 波形鋼鈑ウェブ橋梁 / コンクリート / 繰り返し作用
Outline of Final Research Achievements

This research aims to examine the possibility of rapid deterioration of anchorage performance of steel web embedded in the concrete flanges in steel corrugate web PC bridge due to the liquid state water, and propose some effective countermeasures for the problem. As a result of the research, it is confirmed that the risk of concerning problem is small. This is because the interface opening is confined by the pre-stressing force, and the water pressure of the interface is limited in low level due to the crack penetration through thin concrete flanges. It is also confirmed that the effectiveness of a new countermeasure with a special treatment on the interface between steel and concrete by suppressing local water pressure.

Academic Significance and Societal Importance of the Research Achievements

波形鋼板ウェブPC橋はその力学的合理性ゆえに、近年多く用いられている構造形式である。鋼-コンクリート間の応力伝達が、構造を成立させる上で重要なポイントとなるが、近年の研究から水によって、この応力伝達機構が急速に破壊される場合があることが示され、波形鋼板ウェブPC橋にリスクが潜在している可能性が浮かび上がった。本研究はこの潜在的危険性の有無を明らかにするべく検討を行ったものであるが、結果として懸念したような問題が生じる可能性は低いことを明らかにすることができた。検討を通じて、水による界面劣化機構がより詳細に明らかになり、これに基づいた一般的な構造物に対する界面劣化抑制策が立案された。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (6 results)

All 2019 2018 2017 Other

All Int'l Joint Research (1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] 国立中央大学(台湾)

    • Related Report
      2016 Annual Research Report
  • [Presentation] 液状水による風車基礎アンカー周りのコンクリート損傷の解析2019

    • Author(s)
      関根英人、藤山知加子、千々和伸浩
    • Organizer
      土木学会全国大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] THE INFLUENCE OF THE LIQUID WATER ON FATIGUE PERFORMANCE AT EMBEDDED JOINT OF CORROGATED STEEL WEB PC BRIDGE2018

    • Author(s)
      Youhei Ito, Nobuhiro Chijiwa
    • Organizer
      8th Regional Symposium on Infrastructure development in Civil Engineering
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 地中RC ボックスカルバートの遅れせん断ひび割れ発生機構に関する検討2017

    • Author(s)
      木原 亮太, 千々和 伸浩, Wen-Yi Hung
    • Organizer
      土木学会第72回年次学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Improvement of water penetration resistance of concrete-steel bond by pozzolanic materials and superabsorbent polymer2017

    • Author(s)
      C. Panitudom, M. Iwanami, N. Chijiwa
    • Organizer
      Second Symposium on Concrete and Structures for Next Generation
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] コンクリート部材と鋼材の接合構造2017

    • Inventor(s)
      千々和伸浩,篠崎裕生,齋藤智久
    • Industrial Property Rights Holder
      東京工業大学,三井住友建設,ユーラスエナジーホールディングス
    • Industrial Property Rights Type
      特許
    • Filing Date
      2017
    • Related Report
      2017 Annual Research Report

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Published: 2016-04-21   Modified: 2022-02-16  

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