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  1. 防災科研関係論文

An acceleration-oriented form of simple piecewise linearisation in time series to assess seismically damaged structures

https://nied-repo.bosai.go.jp/records/3839
https://nied-repo.bosai.go.jp/records/3839
afcde718-4643-468b-a378-f71e3f53d0d1
Item type researchmap(1)
公開日 2024-05-13
タイトル
言語 en
タイトル An acceleration-oriented form of simple piecewise linearisation in time series to assess seismically damaged structures
言語
言語 eng
著者 Ryuta Enokida

× Ryuta Enokida

en Ryuta Enokida

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Koichi Kajiwara

× Koichi Kajiwara

en Koichi Kajiwara

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抄録
内容記述タイプ Other
内容記述 This study presents an acceleration-oriented form of simple piecewise linearisation in time series (SPLiTS) to assess the condition of a seismically damaged structure using only its measured acceleration. Its original form could estimate the physical parameters of nonlinear structures in the time domain using inversions of the displacement and acceleration, based on its piecewise linearisation. However, its reliance on measured displacement limited its application only to structures in heavily monitored environments, such as laboratories. To enhance its feasibility for structures with fewer sensors or improper displacement measurement cases, an acceleration-oriented form is introduced, which does not require displacement measurements. To maintain the procedure’s simplicity, the new form retains the basic signal processing techniques: integrations of acceleration and a multi-pass moving-average filtering technique, to obtain the displacement and velocity responses used in the inversion. Based on the principle of SPLiTS, which minimises the central-point shift components, the average filtering technique removes the distortion generated during integration. The new form was examined by applying it to E-Defense shake table experiments on a three-storey steel structure, which contains an improper displacement measurement case. Although the original and new forms reasonably estimated the physical parameters in proper measurement cases, only the new form was effective in the improper case. The examinations confirmed the effectiveness of the acceleration-oriented form relying on the basic techniques and its applicability to estimating physical parameters of the seismically damaged structure for its condition assessment.
言語 en
書誌情報 en : Frontiers in Built Environment

巻 9, 発行日 2023-01-23
出版者
言語 en
出版者 Frontiers Media SA
ISSN
収録物識別子タイプ EISSN
収録物識別子 2297-3362
DOI
関連識別子 10.3389/fbuil.2023.1129403
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