Health monitoring of bridge-like structures using state variable models

Javier Valentín-Sívico, Vittal S. Rao, Leslie R. Koval

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


A global damage detection method for civil engineering structures is proposed. This method provides the capability of determining the reduction in both stiffness and damping parameters of the structural elements. The proposed method uses the state-space representation of the structural dynamics to make the diagnosis of structural integrity. Given that the state-space representation of any system is not unique, the damage detection procedure is developed for the physical coordinates of the state-space representation. A transformation matrix to get any arbitrary state-space representation into the physical coordinates is also utilized. The feasibility of the proposed method is verified on a numerical example as well as on a simulated three-bar truss structure with 3 degrees-of-freedom.

Original languageEnglish
Pages (from-to)156-168
Number of pages13
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - May 23 1997
EventSmart Structures and Materials 1997: Smart Systems for Bridges, Structures, and Highways - San Diego, United States
Duration: Mar 3 1997Mar 6 1997


  • Damage detection
  • Health monitoring
  • Structural integrity


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