Localized damage detection of structures subject to multiple inputs using distance measure of autoregressive model

H. Zheng, A. Mita, I. Yokoi

研究成果: Conference contribution

抜粋

In this paper, the distance measure of autoregressive (AR) model is seemed as damage indicator. Two distance measures are discussed: one is the cepstral distance, and the other is the Itakura distance. The distance measures of AR model have been successfully applied in image, speech and neurological signal processing applications. This research explores new applications of two distance measures for damage detection in civil engineering. A five-storey building model is used for performance verification. Verification simulations show efficiencies of both distance-based damage indicators when the excitations are mutually uncorrelated. However, the ability of damage indicators to damage localization is deteriorated when the multiple excitations are mutually correlated as there are strong correlations among them. In practice, the excitations acting on civil engineering structures are mutually dependent and correlated, such as wind and traffic loading or inertial forces induced by earthquake. To overcome this difficulty, a pre-whitening filter is applied to cancellation of correlations of excitations before calculating the damage indicators. To examine the proposed methodology, experiment data from a shake table test have been tested. It can be concluded from the results that, by using the pre-whitening filter, the damage identification ability of the proposed damage indicators improves significantly, especially for damage localization. The damage indicator increases monotonically with damage severity, which provides the potential to damage quantification.

元の言語English
ホスト出版物のタイトルProceedings of the 4th European Workshop on Structural Health Monitoring
ページ1129-1136
ページ数8
出版物ステータスPublished - 2008 12 1
イベント4th European Workshop on Structural Health Monitoring - Cracow, Poland
継続期間: 2008 7 22008 7 4

出版物シリーズ

名前Proceedings of the 4th European Workshop on Structural Health Monitoring

Other

Other4th European Workshop on Structural Health Monitoring
Poland
Cracow
期間08/7/208/7/4

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Safety, Risk, Reliability and Quality

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  • これを引用

    Zheng, H., Mita, A., & Yokoi, I. (2008). Localized damage detection of structures subject to multiple inputs using distance measure of autoregressive model. : Proceedings of the 4th European Workshop on Structural Health Monitoring (pp. 1129-1136). (Proceedings of the 4th European Workshop on Structural Health Monitoring).