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

2016 Fiscal Year Final Research Report

• 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
• Keywords: 高減衰ゴム / 温度依存性 / 自己発熱 / 免震設計

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.

Free Research Field

構造工学