• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Evaluation of Local, Distortional, and Post Buckling Strength of Ultra Thin and Light Steel Members

Research Project

Project/Area Number 20K14865
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 23010:Building structures and materials-related
Research InstitutionMie University

Principal Investigator

Sato Kosuke  三重大学, 工学研究科, 准教授 (50788510)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords薄板軽量形鋼 / 角形鋼管 / リップ溝形鋼 / 弾性座屈耐力 / 応力再配分 / 座屈後最大耐力 / せん断曲げ相互作用 / 板要素連成効果 / 薄板 / 軽量形鋼 / せん断曲げ / 長方形中空断面部材 / リップ溝形断面部材 / 板要素 / エネルギー法 / 正方形中空断面 / 長方形中空断面 / 弾性局部座屈耐力 / 有限要素法 / 溝形断面 / リップ溝形断面
Outline of Research at the Start

本研究の目的は,板厚が2.3 mm未満と非常に薄い冷間成形された軽量鋼構造部材の角形鋼管とリップ溝形鋼(溝形鋼を含む)を対象として,その大変形挙動を決定する局部座屈・ゆがみ座屈耐力を実際の部材形状(板幅と板厚および材長)と荷重条件(曲げとせん断および圧縮)を考慮して理論的に解明し,座屈後最大耐力を実験と解析で検討して従来よりも合理的に評価することである.

Outline of Final Research Achievements

In this study, ultra thin and light cold formed rectangular steel tube and lipped channel steel members with plate thickness of less than 2.3 mm are targeted. The elastic local buckling of plate elements, distortional buckling strength, and ultimate strength with strength increase due to stress redistribution of post buckling which determine the large deformation behavior are investigated by theoretical analysis, numerical analysis, and structural testing. The buckling strength and post buckling strength are reasonably evaluated including the effects of loading conditions and member shapes which have not been sufficiently considered.

Academic Significance and Societal Importance of the Research Achievements

本研究では,これまで十分に検討されていない薄板軽量形鋼部材の座屈耐力と座屈後耐力に及ぼすせん断曲げ相互作用と板要素連成効果の影響を明らかにし,曲げモーメント勾配と幅厚比と断面及び板要素辺長比に応じた簡便で精度の高い近似式を提案した.現行の構造設計法は板要素の応力状態と境界条件が単純にされた座屈耐力と座屈後耐力に基づいているが,本研究ではより実際に近い現象を扱っており,その成果は今後の座屈設計法の合理化に貢献するものと考えられる.

Report

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

    (8 results)

All 2023 2022 2021 2020

All Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] せん断曲げを受ける長方形中空断面部材の板要素連成弾性局部座屈耐力の導出2023

    • Author(s)
      井上公甫,佐藤公亮
    • Organizer
      日本建築学会東海支部研究集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Derivation of Elastic Local Buckling Strength of Rectangular Hollow Section Members Considering Coupled Effects of Plate Elements2022

    • Author(s)
      Kosuke Inoue and Kosuke Sato
    • Organizer
      International Symposium for Social Infrastructure and Production
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] せん断曲げを受けるリップ溝形断面部材板要素の弾性座屈耐力評価 その1 エネルギー法による解析概要2022

    • Author(s)
      佐藤公亮,斉藤智
    • Organizer
      日本建築学会大会(北海道)学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] せん断曲げを受けるリップ溝形断面部材板要素の弾性座屈耐力評価 その2 エネルギー法による解析結果2022

    • Author(s)
      斉藤智,佐藤公亮
    • Organizer
      日本建築学会大会(北海道)学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] せん断曲げを受ける長方形中空断面部材板要素の弾性座屈耐力評価2022

    • Author(s)
      井上公甫,佐藤公亮
    • Organizer
      日本建築学会大会(北海道)学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 曲げせん断力を受ける長方形中空断面部材板要素の弾性局部座屈耐力2021

    • Author(s)
      佐藤公亮,中野泰我,小橋知季
    • Organizer
      日本建築学会大会学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 曲げせん断力を受ける薄板長方形中空断面部材の座屈後耐力2021

    • Author(s)
      中野泰我,佐藤公亮,小橋知季
    • Organizer
      日本建築学会大会学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 曲げせん断力と軸圧縮力を受ける長方形中空断面部材の弾性局部座屈耐力2020

    • Author(s)
      中野泰我,佐藤公亮,小橋知季
    • Organizer
      日本建築学会大会学術講演会
    • Related Report
      2020 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi