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Study on reduction of the wind load and the aerodynamics vibration of the bridge girder by the bridge appendages

Research Project

Project/Area Number 24760368
Research Category

Grant-in-Aid for Young Scientists (B)

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

Principal Investigator

NAKATO Seiji  関東学院大学, 理工学部, 准教授 (90339789)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2012: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Keywords相関長さ / 矩形断面柱 / 変動揚力係数 / ストローハル成分 / コヒーレンス / 変動風速 / 付加物 / 変動揚力 / パンチングメタル / 渦励振 / 抗力係数
Research Abstract

Study on reduction of the wind loads and the aerodynamics vibrations of bridge girder by appendages with spanwise inhomogeneous section was conducted using wind tunnel. The appendages with spanwise inhomogeneous section were effective on reduction of fluctuating lift acting on the models with some side ratio. For the models with other side ratio, openings with spanwise inhomogeneous section were effective.
Spectral analysis of the hot-wire data was conducted for evaluation of spanwise correlation length. Coherence values at vortex shedding frequency were plotted as function of distance. It could be represented well by Gaussian function, and correlation length was derived as integral scale. Evaluation method of windward correlation length was also proposed with employing auto-correlation function.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (9 results)

All 2014 2013 2012

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

  • [Journal Article] 矩形柱周りの変動風速のストローハル成分の空間相関特性2012

    • Author(s)
      中藤誠二
    • Journal Title

      風工学シンポジウム論文集

      Volume: 22巻 Pages: 139-144

    • NAID

      130004644469

    • Related Report
      2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] 矩形柱周りの変動風速のストローハル成分の空間相関特性2012

    • Author(s)
      中藤 誠二
    • Journal Title

      風工学シンポジウム論文集

      Volume: 22 Pages: 139-144

    • NAID

      130004644469

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] 正方形柱に作用する変動空気力の開口による抑制手法2014

    • Author(s)
      中藤誠二
    • Organizer
      土木学会年次学術講演会
    • Place of Presentation
      大阪
    • Related Report
      2013 Final Research Report
  • [Presentation] 正方形断面柱の後流および発生する空力音の迎角による変化2013

    • Author(s)
      中藤誠二,金子洋樹
    • Organizer
      土木学会年次学術講演会
    • Place of Presentation
      習志野
    • Year and Date
      2013-09-05
    • Related Report
      2013 Final Research Report
  • [Presentation] パンチングメタルから発生する空力音についての風洞実験2013

    • Author(s)
      中藤誠二
    • Organizer
      日本風工学会年次研究発表会
    • Place of Presentation
      仙台
    • Year and Date
      2013-05-30
    • Related Report
      2013 Final Research Report
  • [Presentation] パンチングメタルから発生する空力音についての風洞実験2013

    • Author(s)
      中藤 誠二
    • Organizer
      日本風工学会年次研究発表会
    • Place of Presentation
      東北大学(仙台)
    • Related Report
      2013 Annual Research Report 2012 Research-status Report
  • [Presentation] 正方形断面柱の後流および発生する空力音の迎角による変化2013

    • Author(s)
      中藤 誠二
    • Organizer
      土木学会第68回年次学術講演会
    • Place of Presentation
      日本大学(津田沼)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 辺長比0.6の矩形断面柱に作用する空気力と遠方場の音圧の同時計測2012

    • Author(s)
      中藤誠二
    • Organizer
      土木学会年次学術講演会
    • Place of Presentation
      名古屋
    • Year and Date
      2012-09-06
    • Related Report
      2013 Final Research Report
  • [Presentation] 辺長比0.6の矩形断面柱に作用する空気力と遠方場の音圧の同時計測2012

    • Author(s)
      中藤 誠二
    • Organizer
      土木学会第67回年次学術講演会
    • Place of Presentation
      名古屋大学(名古屋)
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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