振動モードとセンサ特性を考慮した構造物の並列処理型損傷同定

概要

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Prior knowledge in modal parameters is used to enhance a parallel system identification technique that is aimed at estimating the story stiffness and damping of a building structure. The modal parameters are used to decide the pass band for band-pass filters to improve the data quality by selecting the reliable signals confined in the vicinity of modal frequencies. The enhanced identification technique is successfully applied to a five-story steel model structure to find the effectiveness and reliability. Introducing the contribution factor considering the accuracy of sensors and the signal power, data reliability is carefully examined. Finally, it is pointed out that the story stiffness has positive co-relationship with the modal frequency due to larger curvatures in the higher modes. This finding suggests a great potential to improve accuracy of the current damage identification technique.
一般社団法人日本建築学会の論文
2002-03-20