Study of detection method to based on high-order time derivative of acceleration response.

2017 Fiscal Year Final Research Report

• Project/Area Number: 16H07236
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Building structures/Materials
• Research Institution: Niigata Institute of Technology (2017); Tokyo University of Science (2016)
• Principal Investigator: Wakui Masaki 新潟工科大学, 工学部, 助教 (40778205)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Keywords: 加速度の高次微分 / 損傷評価 / 構造ヘルスモニタリング

Outline of Final Research Achievements

When the steel structure experiences a strong earthquake, damage such as yielding, fracture, buckling in structure members may occurs. These phenomena appear as nonlinearity caused by changing the stiffness in the load-displacement relationship.
This study presents a method which is capable of detecting changes in the stiffness of structure using high-order time derivative of acceleration response. The proposed method was validated to the estimation accuracy from earthquake response analysis and shaking table tests. The results show that it is possible to detect and estimate damage for both the analysis result and shaking table tests.

Free Research Field

建築構造