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Improving maintenance for steel structures with ultra-high durability mechanical fasteners

Research Project

Project/Area Number 20H02235
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 InstitutionOsaka Metropolitan University (2022-2023)
Osaka City University (2020-2021)

Principal Investigator

Yamaguchi Takashi  大阪公立大学, 大学院工学研究科, 教授 (50283643)

Co-Investigator(Kenkyū-buntansha) 林 厳  大阪公立大学, 大学院工学研究科, 助教 (10869530)
森山 仁志  徳島大学, 大学院社会産業理工学研究部(理工学域), 講師 (50825495)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2021: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywords高力ボルト / 摩擦接合継手 / メカニカルファスナー / 構造工学・地震工学 / 皿型形状 / 高耐久 / 高力ボルト,摩擦接合継手,メカニカルファスナー / 砂時計型
Outline of Research at the Start

本研究は,高力六角ボルトと同等の耐荷性・疲労耐久性を有し,耐腐食性を格段に改善できる突出部が一切ない砂時計型形状のメカニカルファスナーを新たに開発し,それを部材接合部に実装して,鋼構造物のメンテンナンス負荷を大幅に削減するものである.二つのねじを組み合わせて,高強度,高耐久なファスナーとするための機構の検討,材料の選定,鋼構造物への適用性の検討をFEM解析と実験により,高力ボルト接合を専門とする研究者および金属材料の研究者,ボルトメーカーの技術者によって協働して行う.さらに,最終年度にはそれらの成果を踏まえた,実鋼構造物へ実装するための設計・施工ガイドラインも策定する.

Outline of Final Research Achievements

This study aimed to develop a non-projecting, hourglass-shaped bolt set (hereafter referred to as "DSF") that improves the corrosion resistance of steel structures. Tensile, shear, and fastening performance tests were conducted using a prototype DSF, and its applicability to frictional joints was investigated. The results clarified that the DSF can achieve the target performance when 13 or more threads are engaged and the axial force is controlled using the rotation angle method. In addition, the DSF’s structure, which allows the bolt and nut to engage along its entire length, can provide shear strength equivalent to that of an M22-F10T when extended to a longer length

Academic Significance and Societal Importance of the Research Achievements

従来の高力六角ボルトを用いた部材接合部では,ボルト頭部およびナットの角部を起点とした腐食進行が問題となる.I桁のような開断面部材の接合部に,本研究で提案したDSFを適用することで,部材形状に依存しない防食性能を 大幅改善した摩擦接合継手が実現できる.これにより,鋼橋の損傷そのものを減少させることができ,鋼構造物メンテンナンスに関わる人的・物的コストを大幅に削減することができる.

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

    (15 results)

All 2024 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (11 results) (of which Int'l Joint Research: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Numerical exploration of a high strength and durability non-projected and sandglass-shaped bolt for steel structures' connection2023

    • Author(s)
      Tatsuya Hashimoto, Hitoshi Moriyama, Gen Hayashi, Takashi Yamaguchi, Masayori Yoshimi
    • Journal Title

      Steel Construction Engineering

      Volume: 30

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tightening Properties of Non-projected and Sandglass-shaped Bolt with High strength and Durability2023

    • Author(s)
      Masashi TAKAYAMA, Hitoshi MORIYAMA, Masayori YOSHIMI, Tatsuya HASHIMOTO, Takashi YAMAGUCHI, Gen HAYASHI
    • Journal Title

      Proceedings of the Eleventh International Conference on Advances in Steel Structures (ICASS’2023)

      Volume: 65

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 皿型高力ボルト摩擦接合継手に用いる皿型高力ボルトの頭部開き角度がすべり強度に与える影響2021

    • Author(s)
      郎宇,山口隆司,森山仁志,藤林美早,吉見正頼
    • Journal Title

      鋼構造論文集

      Volume: 28巻 Pages: 11-25

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Anticorrosive Performance of High-strength Bolts with Hexagonal, Cup and Countersunk Heads2024

    • Author(s)
      Hitoshi MORIYAMA
    • Organizer
      The 1st Japan-Slovakia Workshop on Maintenance and Health Monitoring for Structures
    • Related Report
      2023 Annual Research Report
  • [Presentation] Exploration of full-flat bolted connections composed of non-projected and sandglass-shaped bolts with high strength and durability2023

    • Author(s)
      Hitoshi MORIYAMA
    • Organizer
      Proceedings of the 14th Taiwan-Japan Workshop on Structural and Bridge Engineering
    • Related Report
      2023 Annual Research Report
  • [Presentation] Slip tests of double-lap joints Consisting of Non-projected and Sandglass-shaped Bolts with High strength and Durability2023

    • Author(s)
      Masashi TAKAYAMA, Hitoshi MORIYAMA, Masayori YOSHIMI, Takashi YAMAGUCHI, Gen HAYASHI
    • Organizer
      Proceedings of the 13th Japanese-German Bridge Symposium
    • Related Report
      2023 Annual Research Report
  • [Presentation] 両端に皿頭を有する高耐久・高強度ボルトセットを用いた摩擦接合継手のすべり挙動2023

    • Author(s)
      橋本達也,森山仁志,林厳,山口隆司
    • Organizer
      第78回土木学会年次学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 両端に皿頭を有する高強度・高耐久ボルトセットの締付実験2023

    • Author(s)
      高山昌士,森山仁志,橋本達也,山口隆司,林厳,吉見正頼
    • Organizer
      第78回土木学会年次学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 両側に皿頭を有する高強度・高耐久ボルトセットの引張実験2023

    • Author(s)
      高山昌士,森山仁志,橋本達也,山口隆司,林厳,吉見正頼
    • Organizer
      令和5年土木学会四国支部年次講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 両側に皿頭を有する高耐久・高強度ボルトセット(ダブルスピンドルファスナー)の締付穴形状の提案2022

    • Author(s)
      橋本達也,森山仁志,林厳,山口隆司
    • Organizer
      第77回土木学会年次学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 双皿型高耐久性高力ボルトセット(ダブルスピンドルファスナー)に使用するねじ形状の検討2021

    • Author(s)
      橋本達也,山口隆司,林厳,森山仁志
    • Organizer
      土木学会 関西支部年次学術講演会
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Presentation] 双皿型高耐久性ボルトセット(ダブルスピンドルファスナー)のナット形状に関する解析的検討2021

    • Author(s)
      橋本達也,山口隆司,林厳,森山仁志
    • Organizer
      土木学会 第76回年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Prototype of no-projected and Sandglass-shaped Bolt with High-Strength and Durability for Efficient Steel Structures Maintenance2021

    • Author(s)
      Tatsuya Hashimoto, Gen Hayashi, Takashi Yamaguchi, Hitoshi Moriyama:
    • Organizer
      IABSE Symposium, Prague
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 双皿型高耐久性ボルトセット(ダブルスピンドルファスナー)のナット形状に関する解析的検討2021

    • Author(s)
      橋本達也,山口隆司,林厳,森山仁志
    • Organizer
      土木学会 年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 締結具及びナット2024

    • Inventor(s)
      山口 隆司,森山 仁志,吉見 正頼
    • Industrial Property Rights Holder
      山口 隆司,森山 仁志,吉見 正頼
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2024-074671
    • Filing Date
      2024
    • Related Report
      2023 Annual Research Report

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

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