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Verification of wind-induced instabilities of structures against future super typhoons

Research Project

Project/Area Number 20H02232
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionKyoto University

Principal Investigator

Yagi Tomomi  京都大学, 工学研究科, 教授 (30293905)

Co-Investigator(Kenkyū-buntansha) 野口 恭平  京都大学, 工学研究科, 助教 (70802685)
松宮 央登  京都大学, 工学研究科, 准教授 (70516640)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2023: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywords耐風安定性 / 空力振動 / 風洞実験 / 数値風洞実験 / 渦励振 / フラッター / 橋梁 / 高欄 / 長大橋
Outline of Research at the Start

将来の気候変動に伴って、台風が巨大化し想定外の強風が構造物に作用する状況が予想される。新規構造物のみならず既存構造物においても、より精緻に耐風安定性を照査する必要性が高まると考えられ、従来の風洞実験法の精緻化のみならず数値風洞実験法の確立が急務の課題である。さらには、空力振動現象が発現する風速よりも高風速域における橋梁構造物の応答挙動も不明な点が多い。本研究では、来る巨大台風来襲時代に向けて、橋梁構造物におけるより合理的で精度の高い耐風性照査法を確立すること、ならびに想定外の強風が作用した際の空力振動現象の解明を目的としている。

Outline of Final Research Achievements

Considering the possibility of unexpected strong winds acting on structures due to climate change in the future, we have studied the practical application of numerical wind tunnel experiments as an alternative to conventional wind tunnel experiments as a method of verifying safety, as well as the clarification of phenomena and verification methods for the response behavior of structures under unknown high wind velocity conditions. In the former case, modeling the small details of structures such as railings is the most important issue, and we proposed a realistic method to replace them with simple porous medias. New knowledge was also obtained on the effects of small details on various aerodynamic vibration phenomena. In the latter case, we measured the aerodynamic forces of structures rotating in a wind tunnel, formulated new aerodynamic forces that takes into account the effect of relative angular velocity of attack, and established a method for evaluating the response amplitude.

Academic Significance and Societal Importance of the Research Achievements

長大構造物の耐風安定性を数値流体解析によって照査することは、既に技術的には可能であるが、構造物の微細部を再現すると計算コストがまだ高いのが現状である。本研究では、気流の剥離点付近の微細部を簡易なモデルで置き換えることで、数値風洞を耐風設計に利用する可能性を提案した。また、構造微細部の空気力学的影響を調査し、種々の空力振動現象に関する新しい知見を得ることができた。さらに、従来の耐風安定性の照査においては、照査風速において構造物に不適切な振動現象が発生するかしないかの判断のみであったが、照査風速を超える想定外の風速において、大振幅の応答評価ならびに現象解明が可能な方法を提案することに成功した。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (35 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 5 results) Presentation (28 results) (of which Int'l Joint Research: 7 results)

  • [Journal Article] Aerodynamic interaction between galloping instability and vortices in corner-cut rectangular cylinders2024

    • Author(s)
      Hnin Thinzar、Yagi Tomomi、Noguchi Kyohei、Pradhan Manoj、Kyotani Rintaro、Matsumiya Hisato
    • Journal Title

      Journal of Fluids and Structures

      Volume: 127 Pages: 104108-104108

    • DOI

      10.1016/j.jfluidstructs.2024.104108

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Drag reduction of a cylinder by using spiral protuberances to generate three-dimensional surface flow2023

    • Author(s)
      Dao Thu、Matsumiya Hisato、Noguchi Kyohei、Xu Runze、Marey Omar、Yagi Tomomi
    • Journal Title

      Journal of Wind Engineering and Industrial Aerodynamics

      Volume: 241 Pages: 105550-105550

    • DOI

      10.1016/j.jweia.2023.105550

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generation mechanism of wake galloping in two staggered circular cylinders in view of hysteretic flow phenomena2022

    • Author(s)
      Dao Thu、Yagi Tomomi、Noguchi Kyohei、Fukushima Haruki、Mohallem Gabriel、Do Tung
    • Journal Title

      Journal of Wind Engineering and Industrial Aerodynamics

      Volume: 229 Pages: 105127-105127

    • DOI

      10.1016/j.jweia.2022.105127

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MODELING OF HANDRAILS BY POROUS MEDIA IN EVALUATING VORTEX-INDUCED VIBRATION AMPLITUDE OF BRIDGE USING LES2022

    • Author(s)
      高橋 和暉、八木 知己、野口 恭平、? 雨軒、伊藤 靖晃
    • Journal Title

      National Symposium on Wind Engineering Proceedings

      Volume: 27 Issue: 0 Pages: 119-122

    • DOI

      10.14887/natsympwindengproc.27.0_119

    • ISSN
      2435-4392, 2435-5437
    • Related Report
      2022 Annual Research Report
  • [Journal Article] EFFECTS OF SPANWISE SHAPE CHANGE OF SIDE OPENINGS IN A BODY ON GALLOPING INSTABILITY2022

    • Author(s)
      髙田 篤史、八木 知己、野口 恭平、山本 宗一郎、宮元 鴻、王 嘉奇
    • Journal Title

      National Symposium on Wind Engineering Proceedings

      Volume: 27 Issue: 0 Pages: 123-126

    • DOI

      10.14887/natsympwindengproc.27.0_123

    • ISSN
      2435-4392, 2435-5437
    • Related Report
      2022 Annual Research Report
  • [Journal Article] Effects of Handrail Details on Vortex-Induced Vibration for a Box-Girder Bridge2022

    • Author(s)
      Yan Yuxuan、Yagi Tomomi、Noguchi Kyohei、Ito Yasuaki、Shimada Ryo
    • Journal Title

      Journal of Bridge Engineering

      Volume: 27 Issue: 3

    • DOI

      10.1061/(asce)be.1943-5592.0001835

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wake-induced instabilities of parallel circular cylinders with tandem and staggered arrangements2021

    • Author(s)
      Fukushima Haruki、Yagi Tomomi、Shimoda Takuya、Noguchi Kyohei
    • Journal Title

      Journal of Wind Engineering and Industrial Aerodynamics

      Volume: 215 Pages: 104697-104697

    • DOI

      10.1016/j.jweia.2021.104697

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Karman vortex effect on galloping instability of cylinders2023

    • Author(s)
      Thinzar Hnin, Tomomi Yagi, Hisato Matsumiya, Kyohei Noguchi, Rintaro Kyotani
    • Organizer
      Proceedings of the 16th International Conference on Wind Engineering
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Wake galloping suppression in two closely spaced cylinders with surface modification2023

    • Author(s)
      Thu Dao, Tomomi Yagi, Kyohei Noguchi, Gabriel Mohallem
    • Organizer
      Proceedings of Third International Symposium on Dynamics and Aerodynamics of Cables
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on modeling of handrails with porous media to evaluate torsional flutter2023

    • Author(s)
      Yuki Yamakawa, Kyohei Noguchi, Yasuaki Ito, Hisato Matsumiya, Kazuki
    • Organizer
      Proceedings of the 34th KKHTCNN Symposium on Civil Engineering
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Relationship between changes in vortex shedding characteristics and aerodynamic instability due to different corner shapes of rectangular cylinder2023

    • Author(s)
      Kaisei Shimobe, Kyohei Noguchi, Hisato Matsumiya, Thinzar Hnin, Rintaro Kyotani, Tomomi Yagi
    • Organizer
      Proceedings of the 34th KKHTCNN Symposium on Civil Engineering
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of amplitude of rectangular cylinder with a side ratio of 2 based on aerodynamic force considering relative angular velocity of attack2023

    • Author(s)
      Riki Katayama, Hisato Matsumiya, Kyohei Noguchi, Tomomi Yagi
    • Organizer
      Proceedings of the 34th KKHTCNN Symposium on Civil Engineering
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of placing surface spiral protuberances on the drag crisis in a circular cylinder2023

    • Author(s)
      Omar Marey, Minh Thu Dao, Hisato Matsumiya, Kyohei Noguchi, Tomomi Yagi
    • Organizer
      Proceedings of the 34th KKHTCNN Symposium on Civil Engineering
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 相対迎角速度を考慮した空気力を用いた断面辺長比2矩形断面の振幅評価2023

    • Author(s)
      片山理貴, 松宮央登, 野口恭平, 八木知己
    • Organizer
      土木学会第78回年次学術講演会講演概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] 橋梁のねじれフラッターに対する高欄の多孔質体によるモデル化に関する研究2023

    • Author(s)
      山川裕暉, 野口恭平, 伊藤靖晃, 松宮央登, 高橋和暉, Yan Yuxuan, 八木知己
    • Organizer
      土木学会第78回年次学術講演会講演概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] 矩形柱の角部形状の違いによる渦放出特性の変化と空力不安定性との関係2023

    • Author(s)
      下部開成, 野口恭平, 松宮央登, Thinzar Hnin, 京谷麟太郎, 八木知己
    • Organizer
      土木学会第78回年次学術講演会講演概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] Effect of surface spiral protuberances on the drag crisis in a circular cylinder2023

    • Author(s)
      Omar Marey, Minh Thu Dao, Hisato Matsumiya, Kyohei Noguchi, Tomomi Yagi
    • Organizer
      土木学会第78回年次学術講演会講演概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] 上流側および下流側高欄が橋桁の空力振動に与える影響に関する研究2023

    • Author(s)
      野口恭平, 高橋和暉, 山川裕暉, Yan Yuxuan, 伊藤靖晃, 松宮央登, 八木知己
    • Organizer
      2023年度日本風工学会年次研究発表会梗概集
    • Related Report
      2023 Annual Research Report
  • [Presentation] Investigation of the interference between galloping and vortex shedding by changing corners of the rectangular section2022

    • Author(s)
      Rintaro Kyotani, Tomomi Yagi, Kyohei Noguchi, Thinzar Hnin, Manoj Pradhan
    • Organizer
      Proceedings of the 33rd KKHTCNN Symposium on Civil Engineering
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 角部形状を変化させた矩形断面のギャロッピング不安定性と渦放出の関係2022

    • Author(s)
      Hnin Thinzar,八木知己,野口恭平,Pradhan Manoj,京谷麟太郎
    • Organizer
      2022年度日本風工学会年次研究発表会梗概集 (日本風工学会誌,Vol. 47,No. 2 (No. 171))
    • Related Report
      2022 Annual Research Report
  • [Presentation] 連続回転運動中の非定常空気力を用いたねじれ振動中の空気力評価に関する研究2022

    • Author(s)
      後藤崇文,八木知己,奥西智也,松宮央登,野口恭平
    • Organizer
      2022年度日本風工学会年次研究発表会梗概集 (日本風工学会誌,Vol. 47,No. 2 (No. 171))
    • Related Report
      2022 Annual Research Report
  • [Presentation] 角部の形状変化が矩形柱のギャロッピングの発現機構に及ぼす影響2022

    • Author(s)
      京谷麟太郎,八木知己,野口恭平,Thinzar Hnin,Manoj Pradhan
    • Organizer
      2022年度土木学会関西支部年次学術講演会講演概要集
    • Related Report
      2022 Annual Research Report
  • [Presentation] 橋梁の渦励振に対する高欄細部形状の影響に関する研究2022

    • Author(s)
      高橋和暉,Yan Yuxuan,八木知己,野口恭平
    • Organizer
      土木学会第77回年次学術講演会講演概要集
    • Related Report
      2022 Annual Research Report
  • [Presentation] 角部の形状変化による矩形断面のギャロッピングと渦放出への影響2022

    • Author(s)
      京谷麟太郎,八木知己,野口恭平,Thinzar Hnin,Manoj Pradhan
    • Organizer
      土木学会第77回年次学術講演会講演概要集
    • Related Report
      2022 Annual Research Report
  • [Presentation] Wind-induced instabilities of two parallel cylinders with spiral protuberances in close staggered arrangement2022

    • Author(s)
      Thu Dao,Tomomi Yagi,Kyohei Noguchi,Gabriel Mohallem,Tung Do
    • Organizer
      土木学会第77回年次学術講演会講演概要集
    • Related Report
      2022 Annual Research Report
  • [Presentation] 橋梁の渦励振応答に対する高欄細部の影響に関する研究2021

    • Author(s)
      高橋和暉,八木知己,Yan Yuxuan,野口恭平
    • Organizer
      2021年度土木学会関西支部年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 側面に開口部を設けた矩形柱のギャロッピング不安定性に関する研究2021

    • Author(s)
      髙田篤史,八木知己,山本宗一郎,宮元鴻,野口恭平
    • Organizer
      2021年度土木学会関西支部年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 橋梁桁断面の渦励振応答における高欄細部の効果2021

    • Author(s)
      Yan Yuxuan,八木知己,野口恭平,高橋和暉
    • Organizer
      2021年度日本風工学会年次研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 側面の開口部形状を変化させた矩形柱の空力不安定現象に関する研究2021

    • Author(s)
      宮元鴻,八木知己,野口恭平,山本宗一郎,髙田篤史
    • Organizer
      2021年度日本風工学会年次研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] スパイラル突起付き斜張橋ケーブルの空力特性に関する研究2021

    • Author(s)
      Dao Minh Thu,八木知己,野口恭平,福島温樹,Do Quang Tung,桑原彰吾
    • Organizer
      2021年度日本風工学会年次研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 相対迎角速度に基づく自励振動時の矩形断面の空気力特性に関する研究2021

    • Author(s)
      後藤崇文,八木知己,奥西智也,松宮央登,野口恭平
    • Organizer
      2021年度日本風工学会年次研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 橋梁の渦励振に対する高欄細部形状の影響に関する研究2021

    • Author(s)
      高橋和暉,八木知己,野口恭平,伊藤靖晃,Yan Yuxuan
    • Organizer
      土木学会第76回年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Investigation on wake galloping of cable with spiral protuberances by pressure measurements2021

    • Author(s)
      Tung Quang Do, Tomomi Yagi, Kyohei Noguchi, Haruki Fukushima, Thu Minh Dao, Shougo Kuwabara
    • Organizer
      土木学会第76回年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 側面開口部の形状変化が矩形柱のギャロッピング不安定性に及ぼす影響2021

    • Author(s)
      髙田篤史,八木知己,野口恭平,王嘉奇,山本宗一郎,宮元鴻
    • Organizer
      土木学会第76回年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Aerodynamic characteristics of rectangular cylinder with various corner shapes2021

    • Author(s)
      Hnin Thinzar, Pradhan Manoj, Tomomi Yagi, Kyohei Noguchi
    • Organizer
      土木学会第76回年次学術講演会
    • Related Report
      2021 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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