| Project/Area Number |
17K06632
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Building structures/Materials
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| Research Institution | Chiba University |
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Principal Investigator |
Shimada Yuko 千葉大学, 大学院工学研究院, 准教授 (90586554)
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| Project Period (FY) |
2017-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 定着部 / せん断力伝達 / アンカーボルト破断 / ルーズホール / 水平二方向載荷 / 屋根定着部 / 構造解析 / 長孔 / 実験 / 摩擦係数 / 振動実験 / 速度依存性 / 側方破壊 / 接合部 / ローラー支承 / 二方向載荷 / 動的摩擦 |
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| Outline of Final Research Achievements |
The behavior of a loose-hole type roller bearing, which is often used in the bearing section of a vertical truss roof, was investigated by elemental experiments and finite element analysis simulating the specimen to determine how the bearing fails under seismic input from two directions and how the component elements are related to each other. The results show that when the maximum sliding velocity is less than 100 mm/s, the velocity dependence is weak; when the maximum velocity exceeds 100 mm/s, the frictional resistance decreases linearly with increasing velocity; when the base plate slides at an angle, the friction coefficient increases by about 0.1; and when the anchor bolts contact the sides of the base plate in the two-directional horizontal loading, the friction resistance increases by about 1.0. In the case of two-directional horizontal loading, the anchor bolts contacted the sides of the base plate, which then deformed and stopped sliding.
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| Academic Significance and Societal Importance of the Research Achievements |
他のすべり支承より安価で簡単に施工でき，立体トラスを有する既存建物で一般的に用いられているルーズホール形式のローラー支承について，これまで検討がほとんどなされてこなかった水平二方向入力や動摩擦力の影響を含めた検討により，よりリアルな支承部の挙動と特徴を明らかにできた．本研究の成果は，即時に実務に直結できる内容であり，新築建物のみならず，既存建物に対して耐震補強を行う場合，更には被災した建物を復旧させる場合においても，ルーズホール設置型のローラー支承を安全かつ最大限に活用できるようになる面で，耐震工学に大きな貢献をもたらすものである．
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