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Seismic performance and seismic retrofitting method of bridge abutment built on unstable ground during earthquake

Research Project

Project/Area Number 15K06194
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural engineering/Earthquake engineering/Maintenance management engineering
Research InstitutionWaseda University

Principal Investigator

An Tongxiang  早稲田大学, 理工学術院総合研究所(理工学研究所), 客員上級研究員(研究院客員教授) (20530588)

Co-Investigator(Kenkyū-buntansha) 清宮 理  早稲田大学, 理工学術院, 教授 (50298139)
林 偉偉  早稲田大学, 理工学術院, 准教授(任期付) (60623585)
依田 照彦  早稲田大学, 理工学術院, 名誉教授 (70112993)
Co-Investigator(Renkei-kenkyūsha) LIN Weiwei  早稲田大学, 理工学術院, 准教授 (60623585)
Research Collaborator YODA Teruhiko  早稲田大学, 理工学術院, 名誉教授 (70112993)
Project Period (FY) 2015-10-21 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords地盤液状化 / 橋台耐震補強 / 模型振動実験 / 数値シミュレーション / 連続地震 / 地盤液状化・再液状化 / 地盤・構造物相互作用 / 地盤の液状化・流動化 / 橋台の耐震補強 / 数値解析
Outline of Final Research Achievements

Seismic performance and retrofitting method of bridge abutment built on unstable ground during earthquake were verified. The confining pressure of the ground is different between the front and rear of the abutment owing to the difference in the height of the ground surface. Comparing to that of the rear ground, the confining pressure of the front ground is small, liquefaction is easy to happen and the duration of the excess pore water pressure is long. Besides the action of the earth pressure from the rear ground, the significant decline of the support function of the front ground due to the intensive liquefaction, the vibration of the abutment is greatly biased to the front. Large deformation was left in the abutment and its surrounding ground after earthquake.
The retrofitting effect of the ground anchor method and the ground improvement method of the liquefaction countermeasure work was verified. The ground anchor method can greatly suppress the response displacement of the abutment.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (6 results)

All 2017 2016

All Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] 地震時液状化地盤に設置した橋台の耐震補強2017

    • Author(s)
      安 同祥
    • Organizer
      日本土木学会
    • Place of Presentation
      福岡
    • Year and Date
      2017-09-11
    • Related Report
      2016 Research-status Report
  • [Presentation] 地震時地盤液状化による橋台の挙動に関する 模型振動実験2017

    • Author(s)
      安 同祥・清宮 理・宇野 州彦
    • Organizer
      土木学会 第37回地震工学研究発表会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 宇野 州彦・安 同祥・清宮 理・白 可2017

    • Author(s)
      既設橋台の液状化地盤における 耐震補強対策に関する模型振動実験
    • Organizer
      土木学会 第37回地震工学研究発表会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 地震時液状化地盤に設置した橋台の耐震補強2017

    • Author(s)
      安 同祥・清宮 理
    • Organizer
      土木学会 第72回年次学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 橋台背面に杭打設し土圧低減を図る耐震補強工法2016

    • Author(s)
      安 同祥
    • Organizer
      日本土木学会
    • Place of Presentation
      仙台
    • Year and Date
      2016-09-07
    • Related Report
      2015 Research-status Report
  • [Presentation] Seismic Strengthening Effect on an Existing Bridge Abutment by Ground Anchor2016

    • Author(s)
      安 同祥
    • Organizer
      国際橋梁および構造協会(IABSE)
    • Place of Presentation
      中国・広州
    • Year and Date
      2016-05-09
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-10-21   Modified: 2019-03-29  

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