Rapid evaluation of structural soundness of steel frames using a coupling coefficient (CC)-based method
Project/Area Number |
22KF0221
|
Project/Area Number (Other) |
22F22371 (2022)
|
Research Category |
Grant-in-Aid for JSPS Fellows
|
Allocation Type | Multi-year Fund (2023) Single-year Grants (2022) |
Section | 外国 |
Review Section |
Basic Section 22020:Structure engineering and earthquake engineering-related
|
Research Institution | Kyoto University |
Principal Investigator |
倉田 真宏 京都大学, 防災研究所, 准教授 (70624592)
|
Co-Investigator(Kenkyū-buntansha) |
SHEN SHAODONG 京都大学, 防災研究所, 外国人特別研究員
|
Project Period (FY) |
2023-03-08 – 2025-03-31
|
Project Status |
Granted (Fiscal Year 2023)
|
Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2024: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2023: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2022: ¥100,000 (Direct Cost: ¥100,000)
|
Keywords | 地震被災 / 構造ヘルスモニタリング / 残存性能 / 鋼構造 |
Outline of Research at the Start |
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.
|
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.
|
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,
|
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.
|
Report
(1 results)
Research Products
(1 results)