Development of design procedure for high damping rubber bearings under low temperatures and modeling of Mullins' effect

• Project/Area Number: 26289140
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Saitama University
• Principal Investigator: OKUI Yoshiaki 埼玉大学, 理工学研究科, 教授 (40214051)
• Co-Investigator(Kenkyū-buntansha): 党 紀 埼玉大学, 理工学研究科, 助教 (60623535) ; 松本 泰尚 埼玉大学, 理工学研究科, 教授 (90322023) ; 佐藤 京 国立研究開発法人土木研究所, 寒地基礎技術研究グループ, 研究員 (30414171) ; 岡田 慎哉 国立研究開発法人土木研究所, 寒地土木研究所, 主任研究員 (50414173)
• Research Collaborator: IMAI Takashi ゴム支承協会, 技術委員長
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000); Fiscal Year 2016: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2014: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
• Keywords: 高減衰ゴム / 温度依存性 / 自己発熱 / 免震設計 / 耐震設計 / ゴム支承 / 構造工学・地震工学 / 免震 / 橋梁免震 / Mullins効果

Outline of Final Research Achievements

The temperature dependence of mechanical characteristics of high damping rubber bearings (HDRBs) was investigated through cyclic loading tests under different ambient temperatures, especially sub-zero environment. The ambient temperatures and temperatures inside HDRBs during cyclic loading were
different due to self hating, and it is found that mechanical behavior of HDRBs is governed by the inside temperatures. A simple method to estimate the inside temperature was developed on the basis of the cyclic loading tests and thermal conductivity analyses results. Previous cyclic loading tests results at different ambient temperatures were reexamined based on the inside temperatures to estimate temperature dependence of HDRBs.

Research Products

• [Journal Article] TEMPERATURE DEPENDENCE OF MECHANICAL BEHAVIOR OF HIGH DAMPING RUBBER BEARINGS CONSIDERING SELF HEATING (2017)
  • Author(s): 奥井 義昭, 尾上 修浩, 佐藤 京, 今井 隆
  • Journal Title: A1 Volume: 73 Issue: 1 Pages: 165-173
  • DOI: 10.2208/jscejseee.73.165
  • NAID: 130005243655
  • ISSN: 2185-4653
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] An improved rheology model for the description of the rate-dependent cyclic behavior of high damping rubber bearings (2015)
  • Author(s): D.A. Nguyen, J. Dang, Y. Okui, A.F.M.S. Amin, S. Okada, T. Imai
  • Journal Title: Soil Dynamics and Earthquake Engineering Volume: 77 Pages: 416-431
  • DOI: 10.1016/j.soildyn.2015.06.001
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nonlinear Viscosity Law in Finite-Element Analysis of High Damping Rubber Bearings and Expansion Joints (2015)
  • Author(s): A. F. M. S. Amin, A. R. Bhuiyan, T. Hossain, and Y. Okui
  • Journal Title: J. Eng. Mech., ASCE Volume: 141
  • DOI: 10.1061/(asce)em.1943-7889.0000888
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Rate dependency behavior of high damping rubber bearings in low temperature and rheology model (2015)
  • Author(s): Dang, J., Nguyen, D., Okui, Y., Imai, T., Okada, S.
  • Organizer: IABSE Nara spring conference
  • Place of Presentation: Nara, Kasugano International Forum, Japan
  • Year and Date: 2015-05-13
  • Int'l Joint Research
• [Presentation] Self-heating of high damping rubber bearings and its effects on bridge seismic performance (2014)
  • Author(s): Yoshiaki Okui, Dung Anh Nguyen Takashi Imai, Shinya Okada
  • Organizer: Proc. of 9th International Conference on Short and Medium Span Bridges
  • Place of Presentation: Calgary, Canada
  • Year and Date: 2014-07-15 – 2014-07-18