| 研究課題/領域番号 |
22KF0221
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| 補助金の研究課題番号 |
22F22371 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分22020:構造工学および地震工学関連
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| 研究機関 | 京都大学 |
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研究代表者 |
倉田 真宏 京都大学, 防災研究所, 准教授 (70624592)
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| 研究分担者 |
SHEN SHAODONG 京都大学, 防災研究所, 外国人特別研究員
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| 研究期間 (年度) |
2023-03-08 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,100千円 (直接経費: 2,100千円)
2024年度: 900千円 (直接経費: 900千円)
2023年度: 1,100千円 (直接経費: 1,100千円)
2022年度: 100千円 (直接経費: 100千円)
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| キーワード | 鉄骨建物 / 健全性評価 / ひずみ計測 / 地震被災 / 構造ヘルスモニタリング / 残存性能 / 鋼構造 |
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| 研究開始時の研究の概要 |
The proposed CC method provides a mean to evaluate the structural soundness of buildings immediately after an earthquake, which is essential for determining the action of reoccupation or evacuation before subsequent aftershocks,repair or reinforcement schemes,and other aspects.
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| 研究実績の概要 |
The proposed the coupling coefficient (CC) method provides a mean to evaluate the structural soundness of buildings immediately after an earthquake. This year, the influence of concentrated damage on column bases were formulated by modifing the original CC methods with known force demands at the first story columns.The force demands are assumed to be obtained by strain gauge data of the columns in thebottom storey.The modified CC provides information to classify the degree of damage by estimating the residual capacity of the MRF (moment-resisting frames) and predict the future seismic response under hypothetical earthquakes. Finite element analyses were conducted to validate the proposed method. Further, the limit values of CC were obtained by solving the deduced equations. The degree of damage was classified according to these limit values. The equations showed an accuracy of 87 % based on the analysis results. The method was also applied to the dataset of a four-storey MRF tested at the E-Defense shaking table facility for evaluating the accuracy.The CC exhibited an upward trend in general for huge quakes, with successively increasing degrees of damage to the ECBs during earthquakes, with some fluctuations. The dispersion of CC was caused by the diversity of the hysteresis path.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The scheduled research tasks were accomplished and the obtained outcomes were published in one of the top international journal.
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| 今後の研究の推進方策 |
The next year will focus on the threshold evaluation for structural integrity assessment using the proposed CC and modified CC methods.To analyize the relationship between CC values and the extent of structural and nonstructural damage,a supervised learning model will be explorered and the sensitivity analysis will be conducted to prepare a large dataset.
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