Damage assessment of base-isolated building using subspace identification approach

A. Mita, R. Yoshimoto

Research output: Contribution to journalArticlepeer-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
JournalWIT Transactions on the Built Environment
Publication statusPublished - 2003

ASJC Scopus subject areas

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction
  • Automotive Engineering
  • Transportation
  • Safety, Risk, Reliability and Quality
  • Arts and Humanities (miscellaneous)
  • Safety Research
  • Computer Science Applications


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