Study on the coupling of buckling and fracture of steel structural members

• Project/Area Number: 23246097
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Building structures/materials
• Research Institution: The University of Tokyo
• Principal Investigator: KUWAMURA Hitoshi 東京大学, 工学(系)研究科(研究院), 教授 (20234635)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥39,650,000 (Direct Cost: ¥30,500,000、Indirect Cost: ¥9,150,000); Fiscal Year 2014: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2013: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000); Fiscal Year 2012: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000); Fiscal Year 2011: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
• Keywords: 鋼構造 / 座屈 / 破壊 / 塑性変形能力 / 耐震設計

Outline of Final Research Achievements

The major findings are as follows: a mathematical model for the entire mechanical behaviors of structural steels subjected to large plastic strain reversals was developed; a numerical simulator in which the model was incorporated was established; the simulator was confirmed to reenact the actual post-buckling behaviors by comparing the simulation with experiment; a mathematical model for cracking behaviors was established and its accuracy was verified by material tests; the simulator incorporating the models of plastic behavior as well as cracking behavior was found well follow the actual coupling behaviors of buckling and fracture of steel tubular columns subjected to cyclic loadings; and the simulator installed in a seismic response analysis demonstrated that the ductility or the deformation capacity up to structural failure is decreased when the coupling takes place in comparison with the failure due to buckling alone.

Research Products

• [Journal Article] Ductile Fracture Simulation of Structural Steels under Monotonic Tension (2014)
  • Author(s): JIA, Liang-Jiu, and KUWAMURA, Hitoshi
  • Journal Title: Journal of Structural Engineering, ASCE Volume: 140(5) Pages: 1-12
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Experimental and Numerical Study of Postbuckling Ductile Fracture of Heat-Treated SHS Stub Columns (2014)
  • Author(s): JIA, Liang-Jiu, KOYAMA, Tsuyoshi, and KUWAMURA, Hitoshi
  • Journal Title: Journal of Structural Engineering, ASCE Volume: 140(7) Pages: 1-13
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Prediction of Cyclic Behaviors of Mild Steel at Large Plastic Strain Using Coupon Test Results (2014)
  • Author(s): JIA, Liang-Jiu, and KUWAMURA, Hitoshi
  • Journal Title: Journal of Structural Engineering, ASCE Volume: Vol.140, No.2
  • Peer Reviewed
• [Journal Article] 繊維方向荷重を受ける単一ボルト接合部木材の破壊形式 (2013)
  • Author(s): 桑村 仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 78 Pages: 529-538
  • Peer Reviewed
• [Journal Article] 木材の応力緩和試験における技術的問題と対策 (2012)
  • Author(s): 桑村 仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 77 Pages: 937-946
  • Peer Reviewed
• [Journal Article] 木材の支圧応力緩和における異方性と圧密効果 (2012)
  • Author(s): 桑村 仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 77 Pages: 1429-1436
  • Peer Reviewed
• [Journal Article] 木材の縦圧縮クリープ限度 (2012)
  • Author(s): 桑村 仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 77 Pages: 1691-1700
  • Peer Reviewed
• [Journal Article] ボルトと木材の摩擦係数-鉄骨木質構造の研究その11- (2012)
  • Author(s): 桑村仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 77(673) Pages: 407-416
  • NAID: 130004508133
  • Peer Reviewed
• [Journal Article] 合板の割裂強さを担う二軸配向と接着層の役割-鉄骨木質構造の研究その8- (2011)
  • Author(s): 桑村仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 76(663) Pages: 969-978
  • NAID: 130004752446
  • Peer Reviewed
• [Journal Article] 高接触圧における木材と鋼材の摩擦係数-鉄骨木質構造の研究その9- (2011)
  • Author(s): 桑村仁
  • Journal Title: 日本建築学会構造系論文集 Volume: 76(666) Pages: 1469-1478
  • NAID: 130004508062
  • Peer Reviewed
• [Presentation] ノンダイアフラム円形鋼管柱－梁フランジ接合部の弾塑性挙動に関する解析的研究 (2014)
  • Author(s): 佐藤恵治，桑村 仁
  • Organizer: 日本建築学会大会学術講演梗概集（近畿）
  • Place of Presentation: 神戸大学
  • Year and Date: 2014-09-12 – 2014-09-14
• [Presentation] 局部座屈と延性破壊が連成する角形鋼管柱の地震応答 (2014)
  • Author(s): 齋藤剛寛，小山 毅，桑村 仁
  • Organizer: 日本建築学会大会学術講演梗概集（近畿）
  • Place of Presentation: 神戸大学
  • Year and Date: 2014-09-12
• [Presentation] 地震動を受ける角形鋼管の耐力劣化に対する局部座屈と延性破壊の影響に関する解析 (2014)
  • Author(s): 齋藤剛寛，小山 毅，桑村 仁
  • Organizer: 2013年度日本建築学会関東支部研究発表会
  • Place of Presentation: 日本大学
• [Presentation] Ductile Fracture Model for Structural Steels under Monotonic Loading (2013)
  • Author(s): JIA, Liang-Jiu, and KUWAMURA, Hitoshi
  • Organizer: 日本建築学会大会学術講演梗概集
  • Place of Presentation: 北海道大学
• [Presentation] Modified Yoshida-Uemori model to predict metal plasticity using only coupon test (2013)
  • Author(s): 賈 良玖
  • Organizer: 日本建築学会関東支部研究発表会
  • Place of Presentation: 東京都・建築会館
• [Presentation] Prediction of Cyclic Plasticity of Prestrained Steel by Chaboche Model (2012)
  • Author(s): Jia Liang-Jiu
  • Organizer: 日本建築学会大会
  • Place of Presentation: 愛知県・名古屋大学
• [Presentation] 角形鋼管に角錐をはめ込んだ接合構法に関する研究 その９角筒の剛性が角錐の圧縮終局荷重と崩壊モードに与える影響 (2012)
  • Author(s): 小山 毅
  • Organizer: 日本建築学会大会
  • Place of Presentation: 愛知県・名古屋大学
• [Presentation] 鉄骨木質構造の発展に向けた木材の粘弾性に関する研究(その1.繊維方向の静的圧縮・高速圧縮・塑性流動試験) (2012)
  • Author(s): 桑村仁
  • Organizer: 2011年度日本建築学会関東支部研究報告会
  • Place of Presentation: 建築会館(東京)
• [Presentation] Selected Plasticity Models for Structural Steel under Cyclic Large Strain (Cyclic Stress-Strain Behavior to Fracture of Structural Steel, Part 1) (2012)
  • Author(s): JIA Liangjiu
  • Organizer: 2011年度日本建築学会関東支部研究報告会
  • Place of Presentation: 建築会館(東京)
• [Presentation] Uniaxial True Stress-True Strain Behavior to Fracture (Cyclic Stress-Strain Behavior to Fracture of Structural Steel, Part 2) (2012)
  • Author(s): JIA Liangjiu
  • Organizer: 2011年度日本建築学会関東支部研究報告会
  • Place of Presentation: 建築会館(東京)
• [Presentation] Prediction of Cyclic Plasticity Using Monotonic Coupon Test Results (Cyclic Stress-Strain Behavior to Fracture of Structural Steel, Part 3) (2012)
  • Author(s): JIA Liangjiu
  • Organizer: 2011年度日本建築学会関東支部研究報告会
  • Place of Presentation: 建築会館(東京)
• [Presentation] ランダム振幅を受ける鋼部材の破断予測手法 (2011)
  • Author(s): 小山毅
  • Organizer: 日本建築学会大会(関東)
  • Place of Presentation: 早稲田大学(東京)
• [Book] 建築構造 (2013)
  • Author(s): 桑村 仁
  • Total Pages: 271
  • Publisher: 実教出版
• [Remarks] 鋼構造研究室
  • URL: http://stahl.arch.t.u-tokyo.ac.jp/index-j.html
• [Remarks]
  • URL: http://stahl.arch.t.u-tokyo.ac.jp/index-j.html