Damage assessment of base-isolated building using subspace identification approach

A. Mita, R. Yoshimoto

Research output: Contribution to journalConference articlepeer-review


This paper proposes a damage detection algorithm of structural health monitoring (SHM) systems for a base-isolated building. The proposed algorithm mainly consists of the multiple-input multiple-output (MIMO) modal analysis and the physical parameter identification. Story stiffnesses as direct damage indices of the structure are identified using complex modal properties obtained by subspace identification. This algorithm is tuned for base-isolated buildings using model reduction to a single-degree of freedom (SDOF) system. The isolation layer and the superstructure are treated as separate substructures as they are distinctly different in their dynamic properties, so that the damage scenario for a base-isolated building is much simpler and more accurate than for a conventional building. Our strategy is to maximize the benefit of this simplicity. The effectiveness is verified through the numerical analysis and experiment.

Original languageEnglish
Pages (from-to)179-189
Number of pages11
JournalAdvances in Earthquake Engineering
Publication statusPublished - 2003
EventFourth International Conference on Earthquake Resistant Engineering Structures, ERES IV - Ancona, Italy
Duration: 2003 Sept 222003 Sept 24

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology


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