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Seismic capacity of tower-like secondary structures standing on elevated viaducts and vision-based measurement of vibration characteristics of viaduct-tower structure systems

Research Project

Project/Area Number 20H02231
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 InstitutionYokohama National University

Principal Investigator

FUJINO YOZO  横浜国立大学, 先端科学高等研究院, 名誉教授 (20111560)

Co-Investigator(Kenkyū-buntansha) 田村 洋  横浜国立大学, 大学院都市イノベーション研究院, 准教授 (10636434)
伊山 潤  東京大学, 大学院工学系研究科(工学部), 准教授 (30282495)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Keywords構造工学 / 地震工学
Outline of Research at the Start

1995年1月17日兵庫県南部地震や2011.3.11東北地方太平洋沖地震では高架橋上の多くの塔状付属物が倒壊し,交通機能停止を引き起こしたが,その評価法,対策が全く未着手の状態である.
そこで本研究では 1)照明柱を主たる対象に,終局耐震性能を実験と解析により明らかにし,2)高架橋との共振が付属物を損傷倒壊させることに鑑み,補強が必要な照明柱を高架橋の固有振動数から明らかにする手法を開発し,3)遠隔非接触計測による動画像解析から高架橋の固有振動数を同定できる手法を確立させ,4)塔状付属物の合理的かつ効率的な耐震補強指針を作成する.

Outline of Final Research Achievements

Many light poles on elevated highway bridge suffered from damage during 1995 Kobe earthquake, but their aseismic performance has not been studied systematically so far.
In this research, first typical two types of light poles used in Tokyo Metro. Exp. Highway were tested under static cyclic loading and the ultimate performance of the light poles in the nonlinear range was captured. Based on the testing results, seismic performance of the light poles on typical elevated highway bridges under various levels of seismic design ground motion was numerically studied and their 3D behaviors were clarified.
In order to apply this procedure to existing light poles, the natural frequency and damping of each light poles have to be known. A vision-based non-contact vibration measurement of the light poles on elevated highway bridges using motion magnification and dynamic mode decomposition methods is proposed and its high accuracy was proved.

Academic Significance and Societal Importance of the Research Achievements

本研究では,高架橋上の照明柱のうちレベル2 地震動により照明柱躯体の断面に生じる曲げモーメントが全塑性曲げモーメントを超えると予想される直線型ポールを対象とし,動的解析により地震応答特性を把握した.また,実物の照明柱を用いた単調載荷実験および正負交番載荷により照明柱の変形能および終局挙動を把握した.実験より得られた照明柱の非線形挙動と地震後の緊急輸送道路としての機能確保を考慮し,照明柱の限界状態と機能限界量から,限界状態を表す工学的指標を定め,高架橋上の照明柱の実用的な耐震照査法を提案した.併せて,高架橋上の既存の照明柱の固有振動数,減衰をビデオ画像から明らかにする非接触計測法を確立した.

Report

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

    (5 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 5 results)

  • [Journal Article] Stay cable tension estimation of cable‐stayed bridge under limited information on cable properties using artificial neural networks2022

    • Author(s)
      Le Luu Xuan、Siringoringo Dionysius M.、Katsuchi Hiroshi、Fujino Yozo
    • Journal Title

      Structural Control and Health Monitoring

      Volume: 29 Issue: 10

    • DOI

      10.1002/stc.3015

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modal analysis and tension estimation of stay cables using noncontact vision-based motion magnification method2022

    • Author(s)
      Samten Wangchuk, Dionysius M. Siringoringo, Yozo Fujino
    • Journal Title

      Structural Control Health Monitoring

      Volume: NA Issue: 7 Pages: 1-25

    • DOI

      10.1002/stc.2957

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Seismic performance evaluation of existing light poles on elevated highway bridges2021

    • Author(s)
      Dionysius M Siringoringo, Yozo Fujino, Ayami Nagasaki, Takuro Matsubara
    • Journal Title

      Structure and Infrastructure Engineering

      Volume: 17(5) Issue: 5 Pages: 649-663

    • DOI

      10.1080/15732479.2020.1760894

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] SEISMIC RESPONSE CHARACTERISTIC AND SIMPLIFIED ESTIMATION METHODS OF TRAFFIC SIGN STRUCTURES ON ELEVATED HIGHWAY BRIDGES2021

    • Author(s)
      MATSUBARA Takuro、HOSOI Yusuke、KUBOTA Seiji、WADA Arata、FUJINO Yozo、YABE Masaaki
    • Journal Title

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

      Volume: 77 Issue: 3 Pages: 455-474

    • DOI

      10.2208/jscejseee.77.3_455

    • NAID

      130008119340

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 高架橋上に設置された照明柱の耐震性評価2020

    • Author(s)
      右高裕二・松原拓朗・細井雄介・藤野陽三・田村洋・Dionysius Siringoringo・高橋竜太
    • Journal Title

      土木学会年次学術講演会講演概要集(CD-ROM)

      Volume: 75th

    • Related Report
      2020 Annual Research Report
    • Open Access

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Published: 2020-04-28   Modified: 2024-01-30  

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