2021 Fiscal Year Final Research Report
The hybrid simulation of a seismic isolation bridge under the low temperature environment
| Project/Area Number |
19K15069
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 22020:Structure engineering and earthquake engineering-related
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 高減衰ゴム支承 / 温度依存性 / ハイブリッド実験 |
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| Outline of Final Research Achievements |
In this study, in order to reflect the change of the hysteresis characteristic of the high damping rubber bearings to the seismic response, a hybrid simulation system using experimental equipment capable of loading test at low temperature was developed. The hybrid simulation system was developed by using open source. To enhance the usability of the system, sub-program for static response analysis was also developed for the application of a versatile FEM software. As the results, it was possible to incorporate into the response analysis that the hysteresis loop of the bearing changed as the vibration progressed. And the nonlinear hysteresis characteristic of the pier bottom can be expressed.
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| Free Research Field |
地震工学
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| Academic Significance and Societal Importance of the Research Achievements |
室温を-30℃から+50℃の範囲で制御することができる実験室の載荷装置と，オープンソースプログラムや汎用構造解析ソフトを用いたハイブリッド実験システムを構築した．構築したシステムにより，低温環境下での免震橋梁を対象としてハイブリッド実験を行い，低温による免震ゴム支承の特性の変化を取り込んだ地震応答解析を実現した．これにより，千島海溝沿いで近い将来に発生が懸念されている巨大地震が北海道の冬期に発生した場合の，免震橋梁の地震応答を明らかにした．
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