Investigation on low cycle fatigue behavior of concrete-filled steel members

• Project/Area Number: 22760339
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Nagoya University
• Principal Investigator: HANJI Takeshi 名古屋大学, 工学研究科, 准教授 (80452209)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 低サイクル疲労 / コンクリート充填部材 / 溶接継手 / き裂発生 / 疲労強度向上 / コンクリート充填柱 / 疲労き裂 / 角割れ / 局部座屈 / 耐震補強 / 局部ひずみ / 弾塑性有限要素解析

Research Abstract

This study investigated the low cycle fatigue failure mechanism of the concrete-filled steel members and verified the fatigue strength improvement methods. The low cycle fatigue tests revealed that cracks were initiated from the base joints of the specimen in the early stage of loading, meaning that the low cycle fatigue can be a final failure mode of the concrete-filled members. Besides, it was indicated that the weld toe treatment techniques can improve the low cycle fatigue strength of the steel members.

Research Products

• [Journal Article] 溶接止端処理による鋼製橋脚基部の極低サイクル疲労強度向上法 (2011)
  • Author(s): 判治剛, 永松直樹, 舘石和雄
  • Journal Title: 鋼構造年次論文報告集 Volume: 第19巻 Pages: 355-360
  • Peer Reviewed
• [Presentation] Experimental Study on Low Cycle Fatigue Behavior of Concrete-filled Steel Bridge Piers (2012)
  • Author(s): J. E. Park, T. Hanji and K. Tateishi
  • Organizer: The 9th German-Japanese Symposium on Steel, Composite and Concrete Bridges
  • Place of Presentation: Kyoto University, Japan
  • Year and Date: 2012-09-10
• [Presentation] 溶接止端処理による鋼製橋脚基部の極低サイクル疲労強度向上法 (2011)
  • Author(s): 判治剛,永松直樹,舘石和雄
  • Organizer: 日本鋼構造協会鋼構造シンポジウム2011
  • Place of Presentation: 東京ファッションタウンビル(東京都)
  • Year and Date: 2011-11-17
• [Presentation] 溶接止端処理による鋼製橋脚基部の極低サイクル疲労強度向上法 (2011)
  • Author(s): 判治剛
  • Organizer: 日本鋼構造協会鋼構造シンポジウム2011
  • Place of Presentation: 東京ファッションタウン(東京都)
  • Year and Date: 2011-11-17
• [Presentation] グラインダー処理による鋼製橋脚基部の極低サイクル疲労強度向上効果 (2011)
  • Author(s): 永松直樹,判治剛,舘石和雄
  • Organizer: 土木学会平成23年度第66回年次学術講演会
  • Place of Presentation: 愛媛大学(愛媛県)
  • Year and Date: 2011-09-09
• [Presentation] Improvement in Extremely Low Cycle Fatigue Strength of Steel Bridge Piers by Weld Toe Grinding (2011)
  • Author(s): N. Nagamatsu, T. Hanji and K. Tateishi
  • Organizer: The 11th Korea-Japan Joint Symposium on Steel Bridges
  • Place of Presentation: Jeju National University, Korea
  • Year and Date: 2011-08-25
• [Presentation] Improvement in Extremely Low Cycle Fatigue Strength of Steel Bridge Piers by Weld Toe Grinding (2011)
  • Author(s): Naoki Nagamatsu
  • Organizer: The Eleventh Korea-Japan Joint Symposium on Steel Bridges
  • Place of Presentation: International Center, Jeju National University (Korea)
  • Year and Date: 2011-08-25