Studies on a design method for fatigue strength of seismic control devices for girder bridges at the ordinary and seismic times

• Project/Area Number: 26420469
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Setsunan University
• Principal Investigator: Zui Hiroshi 摂南大学, 理工学部, 教授 (30236062)
• Co-Investigator(Kenkyū-buntansha): 田中 賢太郎 摂南大学, 理工学部, 准教授 (50529724) ; 松村 政秀 京都大学, 工学研究科, 准教授 (60315976)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 桁橋 / 制震装置 / 桁間衝突 / 低サイクル疲労強度 / 疲労損傷評価 / 桁の温度伸縮 / 活荷重 / 桁橋制震装置 / 軸方向疲労強度 / 軸直角方向疲労強度 / 曲げ疲労強度 / アルミ合金製ベローズ / テーパー加工 / 非線形時刻歴応答解析 / 軸方向疲労 / 軸直角方向疲労 / 曲げ疲労 / 板曲げ加工

Outline of Final Research Achievements

Fatigue experiments of steel bellows as one of seismic devices for steel girder　bridges were carried out and SN curves were obtained covering a wide range from the low cycle to the very low cycle for deformations due to temperature expansions of girders and L2 earthquakes. SN490 Steel materials with the stipulated upper and lower limit points of yield strength are used aiming manufactures. Fatigue strength is improved by means of residual stress relieving (SR) regarding the conventional Omega shape bellows having a large and two small cylinders. However, the new type U shape bellows consisted only a large cylinder have the same fatigue strength even for wituout SR as the stress relieved Omega shape bellows if the ratio of the radius of the cylinder and thickness is over 5.

Research Products

• [Journal Article] 低サイクル疲労試験によるＵ型鋼製ベローズの疲労強度 (2016)
  • Author(s): 田中 賢太郎・頭井 洋・松村 政秀・佐合大・新名裕
  • Journal Title: 第24回鋼構造年次論文報告集 Volume: 24 Pages: 598603-598603
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 地震動と温度伸縮の影響を受けるエネルギー吸収型桁連結装置（新型鋼製ベローズ）のFEM解析による形状検討 (2015)
  • Author(s): 頭井洋・田中賢太郎・松村政秀・佐合大・新名裕
  • Journal Title: 第18回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集 Volume: 2015 Pages: 97-102
  • Open Access / Acknowledgement Compliant
• [Presentation] 橋桁制震ダンパーベローズへのアルミ合金の適用性 (2016)
  • Author(s): 頭井 洋・田中賢太郎 ・ 斉藤栄徳
  • Organizer: 土木学会第72回年次学術講演会講演概要集
  • Place of Presentation: 東北大学 仙台市
  • Year and Date: 2016-09-07
• [Presentation] 低低サイクル疲労試験とFEM解析によるＵ型鋼製ベローズの疲労強度 (2016)
  • Author(s): 田中 賢太郎・頭井 洋・松村政秀・佐合大・新名裕
  • Organizer: 土木学会第72回年次学術講演会講演概要集
  • Place of Presentation: 東北大学 仙台市
  • Year and Date: 2016-09-07