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Strength deterioration of circular CFT columns with constant cyclic deflection

Research Project

Project/Area Number 19K04715
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 23010:Building structures and materials-related
Research InstitutionThe University of Kitakyushu

Principal Investigator

Kido Masae  北九州市立大学, 国際環境工学部, 准教授 (10453226)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords鋼・コンクリート合成構造 / 長周期地震動 / 構造性能 / 耐力劣化 / 構造工学
Outline of Research at the Start

超高層事務所建築物に多用されている,コンクリート充填円形鋼管柱を対象とし,長周期地震動のように多数回繰返し変位振幅を受けた場合の,耐力劣化挙動に及ぼす,圧縮軸力の大きさ(軸力比),揺れの大きさ(変位振幅),断面寸法(径厚比)の影響を定量的に明らかにし,耐力劣化メカニズムを明らかにすることで,長周期地震動に対する安全性の検討を行うための適用範囲の広い耐力劣化性状評価法を提案することを目的としている.

Outline of Final Research Achievements

The purpose of this research is to clarify the effects of the compressive axial force (axial force ratio), the amplitude of the deformation (rotation angle of the member) and the proportion of cross-section (section depth-thickness ratio) on the strength deterioration of concrete filled circular steel tube columns subjected to cyclic loading like the long-period ground motion.
In the case of the section depth-thickness ratio 37, the relationship between the rotation angle and the limit number of repeated cycles is linear on the logarithmic axis based on the results of this research and previous studies. This relationship was formulated by the least-squares method, and we investigated if the Miner’s rule held. The formula evaluated the experimental value conservatively. In the case of the section depth-thickness ratio 45, the strength deteriorated more than the section-depth-thickness ratio 37.

Academic Significance and Societal Importance of the Research Achievements

本研究では,超高層事務所建築物に多用されているコンクリート充填鋼管柱(以後CFT柱と称す)のうち,断面形状が円形の場合を対象とし,南海トラフを震源域とした大地震により起こる長周期地震動を想定した多数回繰返し実験を,柱部材を取り出したモデルにより行い,耐力劣化挙動に及ぼす軸力比,揺れの大きさ,断面寸法の影響を明らかにした.円形CFT柱に関する実験的研究は少なく,耐力劣化挙動に及ぼす影響は定性的にしかわかっていなかったが,本研究により定量的に明らかにすることができた.本研究成果は,長周期地震動も考慮した設計に役立てることができる点で社会的意義がある.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (20 results)

All 2022 2021 2020

All Journal Article (15 results) (of which Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (5 results)

  • [Journal Article] 円形CFT 断面の累加強度と終局強度の比較2022

    • Author(s)
      薄 拓己,城戸將江
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 87

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 円形CFT 断面の終局強度に関する研究2022

    • Author(s)
      薄拓己,城戸將江
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 61 Pages: 337-340

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 変動変位振幅繰返し載荷を受ける円形CFT 長柱の曲げせん断実験2022

    • Author(s)
      久島俊也,城戸將江,薄拓己
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 61 Pages: 357-360

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 一定変位振幅繰返し載荷を受ける円形CFT 長柱の曲げせん断実験2022

    • Author(s)
      久島俊也,城戸將江,薄拓己
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 61 Pages: 361-364

    • Related Report
      2021 Annual Research Report
  • [Journal Article] STABILITY INDEX AND EFFECTIVE LENGTH FACTOR2021

    • Author(s)
      KIDO Masae、TSUDA Keigo
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 86 Issue: 786 Pages: 1259-1270

    • DOI

      10.3130/aijs.86.1259

    • NAID

      130008080425

    • ISSN
      1340-4202, 1881-8153
    • Year and Date
      2021-08-30
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] COMPARISON BETWEEN SIMPLE SUPERPOSED STRENGTH AND GENERALIZED SUPERPOSED STRENGTH OF CFT CROSS SECTION ABOUT ALLOWABLE STRENGTH2021

    • Author(s)
      KIDO Masae、TSUDA Keigo
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 86 Issue: 784 Pages: 1014-1025

    • DOI

      10.3130/aijs.86.1014

    • NAID

      130008058801

    • ISSN
      1340-4202, 1881-8153
    • Year and Date
      2021-06-30
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] STABILITY INDEX AND EFFECTIVE LENGTH FACTOR OF PLANE FRAMES2021

    • Author(s)
      KIDO Masae、TSUDA Keigo
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 86 Issue: 782 Pages: 630-641

    • DOI

      10.3130/aijs.86.630

    • NAID

      130008031434

    • ISSN
      1340-4202, 1881-8153
    • Year and Date
      2021-04-30
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 平面骨組の安定性指標と座屈長さ係数2021

    • Author(s)
      城戸 將江,津田 惠吾
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 60 Pages: 353-356

    • Related Report
      2021 Annual Research Report
  • [Journal Article] CFT 断面の許容耐力における単純累加強度と一般化累加強度の比較2021

    • Author(s)
      城戸 將江,津田 惠吾
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 60 Pages: 373-376

    • NAID

      130008058801

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 一定変位振幅繰返し載荷を受ける円形CFT 長柱の曲げせん断実験2021

    • Author(s)
      久島俊也,城戸將江,薄拓己,阿部真士
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 60 Pages: 381-384

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Journal Article] CFT断面の許容耐力における単純累加強度と一般化累加強度の比較2021

    • Author(s)
      城戸將江,津田惠吾
    • Journal Title

      日本建築学会構造系論文集

      Volume: 86 Pages: 1014-1025

    • NAID

      130008058801

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] CFT断面の許容耐力における単純累加強度と一般化累加強度の比較2021

    • Author(s)
      城戸將江,津田惠吾
    • Journal Title

      日本建築学会九州支部研究報告

      Volume: 60 Pages: 373-374

    • NAID

      130008058801

    • Related Report
      2020 Research-status Report
  • [Journal Article] Structural behavior of CFT beam-columns with high strength steel subjected to cyclic loading2020

    • Author(s)
      城戸將江,藤岡大二郎,城崎康太
    • Journal Title

      Proc. of 17th World Conference on Earthquake Engineering, 17WCEE Sendai, Japan

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] EVALUATION OF PΔ EFFECT FOR SYMMETRICAL BRACED FRAMES2020

    • Author(s)
      城戸將江,津田惠吾
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 85 Issue: 771 Pages: 771-778

    • DOI

      10.3130/aijs.85.771

    • NAID

      130007849486

    • ISSN
      1340-4202, 1881-8153
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] EVALUATION OF PΔ MOMENT AND THE EFFECT ON DEFORMATION OF COLUMNS IN SYMMETRICAL FRAMES2020

    • Author(s)
      城戸將江,津田惠吾
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 85 Issue: 767 Pages: 151-157

    • DOI

      10.3130/aijs.85.151

    • NAID

      130007792084

    • ISSN
      1340-4202, 1881-8153
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 一定変位振幅繰返し載荷を受ける円形CFT 長柱の構造性能2022

    • Author(s)
      阿部真士,城戸將江
    • Organizer
      日本建築学会大会学術講演梗概集
    • Related Report
      2021 Annual Research Report
  • [Presentation] 多数回繰返し載荷を受ける円形CFT 柱の曲げせん断実験2021

    • Author(s)
      阿部真士,城戸將江,薄拓己,久島俊也
    • Organizer
      日本建築学会大会学術講演梗概集
    • Related Report
      2021 Annual Research Report
  • [Presentation] 円形CFT 断面の累加強度と終局強度の比較2021

    • Author(s)
      城戸將江
    • Organizer
      日本建築学会大会学術講演梗概集
    • Related Report
      2021 Annual Research Report
  • [Presentation] 多数回繰返し載荷を受ける円形CFT柱の曲げせん断実験2021

    • Author(s)
      久島俊也,城戸將江,阿部真士
    • Organizer
      第14回複合・合成構造の活用に関するシンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 円形CFT断面の累加強度と終局強度の比較2021

    • Author(s)
      薄拓己,城戸將江
    • Organizer
      第14回複合・合成構造の活用に関するシンポジウム
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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