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Study on seismic design of piers with highly rigid foundations

Research Project

Project/Area Number 18K04324
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionKobe University

Principal Investigator

Nagao Takashi  神戸大学, 都市安全研究センター, 教授 (30356042)

Co-Investigator(Kenkyū-buntansha) 竹山 智英  神戸大学, 工学研究科, 准教授 (00452011)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords桟橋 / 耐震性能 / 地盤反力 / 杭地盤相互作用 / 地盤反力係数 / 基礎幅 / 側方流動 / 土圧 / 3次元効果 / 動的相互作用 / 耐震設計
Outline of Final Research Achievements

The seismic design method for piers of port structures has been established for piers using the steel pipe pile foundation, and a seismic design method has not been established for piers using highly rigid foundations such as caissons, which are considered to be superior in seismic resistance to steel pipe pile foundations. There is a problem in applying the design method constructed for piers with steel pipe pile foundations to those with high rigid foundations; the behavior of the pier during earthquakes differs because of the difference in the foundation rigidity, and the effect of the ground passing through between piles during massive earthquakes cannot be sufficiently considered by the present design method.
In this study, seismic resistance of piers with highly rigid foundations such as caisson foundations was examined by laboratory experiment and analysis.

Academic Significance and Societal Importance of the Research Achievements

高剛性基礎式桟橋を現在の設計法で設計すると,基礎の高剛性さを適切に考慮できないため,過大な設計となってしまう.これは工費の不適切な増加につながる.さらに,高剛性基礎の耐震設計法は,半世紀近く昔の実験結果を,その合理性を再検証することなく使い続けている項目があり,これも合理的な耐震設計法の構築という観点から問題がある.本研究の成果を活用することにより,高剛性基礎式桟橋の合理的な耐震設計を行うことが可能になる.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019 2018

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] An Experimental Study on the Way Bottom Widening of Pier Foundations Affects Seismic Resistance2020

    • Author(s)
      Nagao T.
    • Journal Title

      Engineering, Technology & Applied Science Research

      Volume: 10 Issue: 3 Pages: 5713-5718

    • DOI

      10.48084/etasr.3590

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of Foundation Width on Subgrade Reaction Modulus2020

    • Author(s)
      Nagao T.
    • Journal Title

      Engineering, Technology & Applied Science Research

      Volume: 10 Issue: 5 Pages: 6253-6258

    • DOI

      10.48084/etasr.3668

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Code verification of soil dynamics simulations: A case study using the method of numerically manufactured solutions2020

    • Author(s)
      Chen Jian、Takeyama Tomohide、O-tani Hideyuki、Yamanoi Kazuki、Oishi Satoru、Hori Muneo
    • Journal Title

      Computers and Geotechnics

      Volume: 117 Pages: 103258-103258

    • DOI

      10.1016/j.compgeo.2019.103258

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental Study of the Lateral Spreading Pressure Acting on a Pile Foundation During Earthquakes2019

    • Author(s)
      T. Nagao and D. Shibata
    • Journal Title

      Engineering, Technology & Applied Science Research

      Volume: Vol. 9, No. 6 Pages: 5021-5028

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Toward a numerical-simulation-based liquefaction hazard assessment for urban regions using high-performance computing2019

    • Author(s)
      Chen Jian、O-tani Hideyuki、Takeyama Tomohide、Oishi Satoru、Hori Muneo
    • Journal Title

      Engineering Geology

      Volume: 258 Pages: 105153-105153

    • DOI

      10.1016/j.enggeo.2019.105153

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Application of Partitioned Iterative Coupling Approach to Multi-physics2019

    • Author(s)
      Takeyama Tomohide、Tachibana Shinya、Kitanoi Tomoki、Iizuka Atsushi
    • Journal Title

      Journal of Civil Engineering and Construction

      Volume: 8 Issue: 1 Pages: 13-18

    • DOI

      10.32732/jcec.2019.8.1.13

    • NAID

      120006708252

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 部拡幅ケーソン基礎式桟橋の基礎幅と地盤反力度に関する実験的検討2021

    • Author(s)
      長尾 毅,津田葉涼太,小宅知行,倉知禎直
    • Organizer
      土木学会年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 側方流動による地盤変位と杭基礎に作用する土圧に関する水平載荷実験2019

    • Author(s)
      柴田大介,長尾 毅
    • Organizer
      土木学会年次学術講演会
    • Related Report
      2019 Research-status Report 2018 Research-status Report
  • [Presentation] 粒子法による土水連成解析の定式化と多次元解析による検証2019

    • Author(s)
      中道洋平,杉江茂彦,竹山智英
    • Organizer
      土木学会年次学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Earthquake response of open-type wharf with pneumatic caisson foundation2018

    • Author(s)
      Shibata D. and Nagao
    • Organizer
      SUSI2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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