Structural health assessment under uncertainty

Hasan Katkhuda, Achintya Haldar

Research output: Chapter in Book/Report/Conference proceedingChapter


A generalized system identification procedure is presented to identify structural stiffness parameters at the element level using only limited noise-contaminated response information and completely ignoring the excitation information. The authors called it a GILS-EKF-UI method. The structures are represented by finite elements. The procedure detects defects by tracking the changes in the stiffness property of each element. The method can identify defect-free and defective structures even in the presence of relatively large amount of noise in the responses. Defects could be minor in nature. The method is very robust and can identify defects caused by different types of loadings including seismic loading. The research team at the University of Arizona is in the process of developing a nondestructive defect assessment procedure for existing structures and the GILS-EKF-UI procedure will be an essential component of that effort.

Original languageEnglish (US)
Title of host publicationRecent Developments in Reliability-Based Civil Engineering
PublisherWorld Scientific Publishing Co.
Number of pages2
ISBN (Electronic)9789812707222
ISBN (Print)9812564195, 9789812564191
StatePublished - Jan 1 2006

ASJC Scopus subject areas

  • Engineering(all)


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