Study on mechanical properties of corroded bridge wires and repair methods

• Project/Area Number: 18560470
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Tokai University
• Principal Investigator: NAKAMURA Shunichi Tokai University, 工学部, 教授 (40297198)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥4,060,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥660,000); Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
• Keywords: 橋梁ケーブル / 腐食 / 疲労 / 補修 / 耐久性 / bridge wires / cable corrosion / galvanized wires / corrosion fatigue / hydrogen embrittlement / artificial notch wires / Bridge Wires / Cable Corrosion / Galvanized Wires / Corrosion Fatigue / Hydrogen Embrittlement / Brjdge Wires / Coriosion Fatigue

Research Abstract

腐食した橋梁ケーブルの破断原因は、米国の研究者が主張している水素ぜい化が主要因ではなく、腐食・繰り返し応力・水素が複合的に作用したメカニズムであることを見出した。腐食したケーブルに対して種々の補修法を提案し、その優劣を比較検討した。その結果、ケーブル内部にエポキシ樹脂またはジンク塗料を充填した補修法が有望であった。これらの成果は、一流技術雑誌に2編、学会にて3編の論文を発表した。また、3編の論文を投稿中である。

Research Products

• [Journal Article] Hydrogen embrittlement and corrosion fatigue of bridge wires (2009)
  • Author(s): Shunichi Nakamura, Keita Suzumura
  • Journal Title: Journal of Constructional Steel Research Vol.64, No.2 Pages: 247-252
  • Peer Reviewed
• [Journal Article] Hydrogen embrittlement and corrosion fatigue of bridge wires (2009)
  • Author(s): Shunichi Nakamura Keita Suzumura
  • Journal Title: Journal of Constructional Steel Research Vol. 64 No. 2 Pages: 247-252
  • Peer Reviewed
• [Journal Article] 腐食した橋梁用亜鉛めっき鋼線の疲労特性 (2006)
  • Author(s): 鈴村恵太、中村俊一、樽井敏三
  • Journal Title: 土木学会論文集A No.62, No.3 Pages: 614-622
  • Peer Reviewed
• [Journal Article] 腐食した橋梁用亜鉛めっき鋼線の疲労特性 (2006)
  • Author(s): 鈴村恵太, 中村俊一, 樽井敏三
  • Journal Title: 土木学会論文集A No.62,No.3 Pages: 614-622
• [Journal Article] Fatigue and Fracture of Corroded Bridge Wires, (2006)
  • Author(s): Shun-ichi Nakamura, Keita Suzumura
  • Journal Title: First International Conference on Fatigue and Fracture in the Infrastructure Vol.1 Pages: 1-14
• [Journal Article] 腐食した橋梁用亜鉛めっき鋼線の拡散性水素濃度について (2006)
  • Author(s): 鈴村恵太, 中村俊一
  • Journal Title: 鋼構造年次報告集 Vol.14 Pages: 219-224
• [Presentation] Strength of corroded bridge wires and repair methods (2008)
  • Author(s): Shunichi Nakamura Keita Suzumura
  • Organizer: 17th Congress of IABSE
  • Place of Presentation: Chicago USA
  • Year and Date: 2008-09-18
• [Presentation] Strength of corroded bridge wires and repair methods (2008)
  • Author(s): Shunichi Nakamura, Keita Suzumura
  • Organizer: 17th Congress of IABSE
  • Place of Presentation: Chicago
• [Presentation] Fatigue and Fracture of Corroded Bridge Wires (2006)
  • Author(s): Shunichi Nakamura, Keita Suzumura
  • Organizer: First International Conference on Fatigue and Fracture in the Infrastructure, Vol.1, 1-14
• [Presentation] 腐食した橋梁用亜鉛めっき鋼線の拡散性水素濃度について (2006)
  • Author(s): 鈴村恵太、中村俊一
  • Organizer: 鋼構造年次報告集Vol.14