| Project/Area Number |
22K14362
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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 23010:Building structures and materials-related
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| Research Institution | Hiroshima University |
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Principal Investigator |
Chen Xingchen 広島大学, 先進理工系科学研究科(工), 助教 (00816564)
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 減衰ヒンジ接合 / ダンパー / エネルギー吸収 / 変形性能 / 静的載荷実験 / 有限要素解析 / 動的応答解析 / damped-pin joint / cyclic loading test / numerical analysis / theoretical evaluation / multi-hazard / resilience / structural system / strong spine |
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| Outline of Research at the Start |
This research aims to enhance resilience of the typical strong-spine system against various natural hazards, and establish the evaluation and design methods.Damped beam-to-column pin joints will be developed to reduce the damage concentration at the collector ends. To reduce column base damage, several solutions will be proposed and design suggestion using normalized stiffness index will be proposed.The evaluation and design methods of the proposed system will be established by using the simplified multi-degree-of-freedom models and verified by numerical analysis and tests.
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| Outline of Final Research Achievements |
This research developed two innovative types of damped pin joints designed for building structures where the formation of plastic hinges is permitted. Unlike traditional plastic hinges, these damped pin joints offer the advantage of easy repair by simply replacing the dampers, thereby enhancing the resilience of building structures suffering from natural disasters.
The research includes theoretical analysis of the mechanical properties of the proposed joints, followed by cyclic loading tests conducted on specimens with various parameters. The test results demonstrated stable hysteresis performance and desired characteristics. Additionally, numerical analysis models were developed to simulate the hysteretic behavior of the joints, with comparison against the test results to verify accuracy. Finally, dynamic analyses were performed on steel frame structures with varying numbers of stories, revealing that the proposed joints effectively reduce the structural responses.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究ではエネルギー吸収性能を持つ革新的なヒンジ接合を提案している。、提案ヒンジ接合は一般性に優れてあり、従来のラーメン構造から心棒構造等まで適用可能である。載荷実験と有限要素解析、地震応答解析を通じて幅広いパラメトリックスターを行い、提案接合の特性を十分検討したことなど学術的意義が高い。本研究で得られた知見は建物の主要構造部の損傷低減およびレジリエンス向上に有用になり、社会的に意義のある研究成果である。
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