Development for reduction technique of thermal stress induced in structural members strengthened by carbon-fiber

• Project/Area Number: 24656269
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Kyoto University
• Principal Investigator: KAWANO Hirotaka 京都大学, 経営学研究科, 教授 (80344018)
• Co-Investigator(Kenkyū-buntansha): ISHIKAWA Toshiyuki 京都大学, 大学院工学研究科, 助教 (00423202)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 熱応力 / 炭素繊維 / アルミニウム合金 / 線膨張係数 / 固有値解析 / 温度 / はく離 / 接着剤

Research Abstract

In the structural members strengthened by bonding carbon-fiber reinforced polymer, CFRP, thermal stresses are introduced when the temperature changes because the linear thermal expansion coefficients of conventional structural materials, e.g. steel or concrete, and CFRP are mismatched. With this in mind, we proposed a technique to reduce the thermal stress in structural members strengthened by CFRP, which involves bonding aluminum alloy plates with CFRP. The thermal test results showed the effectiveness of proposed method for reduction of thermal stress in structural members. Furthermore, the evaluation method for debonding of CFRP from structural members was proposed.

Research Products

• [Journal Article] Energy Release Rate for Debonding of Patch Plate Adhered onto Steel Member (2013)
  • Author(s): 清水優,大倉慎也,石川敏之,服部篤史,河野広隆
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) Volume: 69 Issue: 2 Pages: I_701-I_710
  • DOI: 10.2208/jscejam.69.I_701
  • NAID: 130004557401
  • ISSN: 2185-4661
  • Peer Reviewed
• [Journal Article] Reduction of thermal stress induced in steel plate strengthened by bonding CFRP plate on one side, Asia-Pacific Conference on FRP in Structures (2013)
  • Author(s): Ishikawa, T., Nagao, T., Kobayashi, A., Shimizu, M., Hattori, A. and Kawano, H
  • Journal Title: APFIS, Melbourne Volume: No.8
  • Peer Reviewed
• [Journal Article] Simple equations of shear and normal stresses at the ends of CFRP plate bonded onto steel member (2013)
  • Author(s): Shimizu, M., Ishikawa, T., Hattori, A. and Kawano, H
  • Journal Title: Asia-Pacific Conference on FRP in Structures, APFIS, Melbourne Volume: No.17
  • Peer Reviewed
• [Journal Article] Reduction of thermal stress induced in steel plate strengthened by bonding CFRP plate on one side (2013)
  • Author(s): Ishikawa, T., Nagao, T., Kobayashi, A., Shimizu, M., Hattori, A. and Kawano, H
  • Journal Title: Asia-Pacific Conference on FRP in Structures, APFIS Volume: APFIS Melbourne会議
• [Journal Article] Simple equations of shear and normal stresses at the ends of CFRP plate bonded onto steel member (2013)
  • Author(s): Shimizu, M., Ishikawa, T., Hattori, A. and Kawano, H
  • Journal Title: Asia-Pacific Conference on FRP in Structures, APFIS Volume: APFIS, Melbourne会議
• [Journal Article] Reduction of thermal stress induced in steel members by bonding CFRP plate on one side (2012)
  • Author(s): 石川敏之,冨田貴大,服部篤史,河野広隆,長尾隆史,小林朗
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) Volume: 68 Issue: 2 Pages: I_703-I_714
  • DOI: 10.2208/jscejam.68.I_703
  • NAID: 130004557317
  • ISSN: 2185-4661
  • Peer Reviewed
• [Journal Article] Reduction technique of thermal stress induced in steel plate strengthened with CFRP plates (2012)
  • Author(s): Ishikawa, T., Hattori, A., Kawano, H., Nagao, T. and Kobayashi, A
  • Journal Title: 9th German-Japan Bridge Symposium Volume: 4A-05 Pages: 159-160
• [Journal Article] CFRP板が片面に接着された鋼部材に生じる熱応力の低減 (2012)
  • Author(s): 石川敏之，冨田貴大，服部篤史，河野広隆，長尾隆史，小林 朗
  • Journal Title: 土木学会論文集A2（応用力学） Volume: Vol.68，No.2（応用力学論文集Vol.15） Pages: 703-714
  • NAID: 130004557317
  • Peer Reviewed
• [Presentation] 鋼部材に接着された当て板のはく離に対するモード別エネルギー解放率の提案 (2013)
  • Author(s): 清水優,大倉慎也,石川敏之,服部篤史,河野広隆
  • Organizer: 土木学会第68回年次学術講演会概要集第1部
• [Presentation] 鋼部材に接着された当て板のはく離に対するモード別エネルギー解放率の提案 (2013)
  • Author(s): 清水 優
  • Organizer: 土木学会第68回年次学術講演会
  • Place of Presentation: 日本大学（船橋）
• [Presentation] CFRP板が片面に接着された鋼板に生じる熱応力の低減効果 (2012)
  • Author(s): 石川敏之,服部篤史,河野広隆,冨田貴大,長尾隆史,小林朗
  • Organizer: 土木学会第67回年次学術講演会概要集共通セッション
• [Presentation] CFRP板が片面に接着された鋼板に生じる熱応力の低減効果
  • Author(s): 石川敏之
  • Organizer: 土木学会第67回年次学術講演会概要集共通セッション
  • Place of Presentation: 名古屋大学
• [Remarks]
  • URL: http://csd.kuciv.kyoto-u.ac.jp/
• [Remarks] 河野研究室 研究紹介
  • URL: http://csd.kuciv.kyoto-u.ac.jp/introduction.html