Basic study on evaluation of residual seismic performance of building structure using acceleration response record

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15142
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Niigata Institute of Technology
• Principal Investigator: Wakui Masaki 新潟工科大学, 工学部, 准教授 (40778205)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 加速度微分 / 構造ヘルスモニタリング / 非線形性

Outline of Final Research Achievements

In this study, the applicability of the method using the second derivative of the acceleration response was examined for the purpose of evaluating the degree of damage to the structure during an earthquake. In the previous studies by the author, the method of differential processing has not been verified when calculating the second derivative of acceleration. Therefore, an acceleration differential sensor was manufactured that performs differential processing with an analog circuit, and examined its applicability by shaking table experiments. As a result, although it was possible to detect the non-linearity that occurs in the load deformation relationship of the structure by the proposed method, it was difficult to identify the damage position.

Free Research Field

建築構造

Academic Significance and Societal Importance of the Research Achievements

地震等による災害が発生した際に、建物の継続使用性や避難の必要性を迅速に判断すること非常に重要である。本研究では加速度応答の2階微分というこれまであまり着目されていなかった物理量を用いることで、地震時に生じる損傷を検出できる可能性を示した。併せて、加速度2階微分を計測できるセンサ開発とその適用可能範囲の検証によって、実用化に向けた基礎的なデータを蓄積することができた。