2022 Fiscal Year Annual Research Report
修正CC法を用いた地震被災鉄骨建物の耐震健全度判定手法
| Project/Area Number |
22F22371
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| Allocation Type | Single-year Grants |
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| Research Institution | Kyoto University |
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Principal Investigator |
倉田 真宏 京都大学, 防災研究所, 准教授 (70624592)
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| Co-Investigator(Kenkyū-buntansha) |
SHEN SHAODONG 京都大学, 防災研究所, 外国人特別研究員
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| Project Period (FY) |
2022-11-16 – 2025-03-31
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| Keywords | 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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| Outline of Annual Research Achievements |
A method for evaluating the post-earthquake condition of steel frame structures based on the coupling coefficient (CC) has been developed. The CC is an index that reflects each story's internal force distribution and damage mechanism in frames, computed with the drift distribution at the maximum structural response estimated from limited monitoring data and the design drawings of the target structure.
Preliminary finite element analyses showed that the CC contains some important information that is not obvious in displacement responses, such as the structure's global and local working modes. Useful information is whether the damage to each story is mainly distributed on the beams or columns. An incremental dynamic analysis with an 18-story steel frame tested at the E-Defense shaking table facility confirmed that the identified structure's condition by the CC-based method corresponds to the damage information reported by visual inspection.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The verfication of the proposed CC method against 18-story steel building test data, originally planned in FY2023, had been completed in FY2022,
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| Strategy for Future Research Activity |
The original method assumed buildings with fixed column bases. In FY 2023, we modify the method for widely applications,including frames with semi-rigid column bases. The modified method assumes bending moment measurements at the first-story columns. The modified method will be verified against the experimental data on 4-story steel frame with weak-column-base-strong-column design, tested at the E-Defense shaking table facility in December 2022. Further, we verify the method by extensive FE analyses using the high-end computational environment and abundant seismic records.
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