2023 Fiscal Year Final Research Report
| Project/Area Number |
22K20468
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0304:Architecture, building engineering, and related fields
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| Research Institution | Kansai University |
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Principal Investigator |
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| Project Period (FY) |
2022-08-31 – 2024-03-31
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| Keywords | 法隆寺 / 慶長修理 / 貫補強 / 地震対策 / 耐震補強 / 補強効果 / 歴史地震 |
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| Outline of Final Research Achievements |
This study examines the reinforcement in the repair of buildings in the Horyu-ji, which was carried out after the Keicho Fushimi Earthquake in 1596. This reinforcement added a lot of Nuki (beams that pierced the columns they connected). As a result of data investigation, field survey, and numerical analysis, they were revealed that the construction productivity and reinforcement effect were very high.
In addition, a reduced-scale model of the Kairo (Corridor) of To-in (East Temple) of Horyu-ji was used to reproduce the conditions before and after the reinforcement, and loading and vibration tests were conducted. The results showed that the corridor may have two vibration modes during an earthquake: the first one, in which the center is convex in the plane, and the second one, in which the center and both ends are in opposite direction. The reinforcement was found to be highly effective in increasing the natural frequency of the first mode.
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| Free Research Field |
建築保存工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、文化財建造物の歴史地震の直後に行われた構造補強を考察した。当該補強の設計方法や施工方法を明らかにしつつ、その補強効果を構造計算や模型実験を行うことで定量的に評価した。これまで、文化財建造物の建設後に行われた構造補強は当初の姿を損なう改変とみなされ低く評価されることが多かったが、本研究ではこれを建築構造学の観点から見直すことで、今後の地震対策に有用な知見を提供するとともに、当時の災害対応として積極的に評価することができた。災害国日本における文化財建造物保護に新しい視点を提供できたと考える。
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