Modal Parameter Estimation of Model Steel Bridge Using System Identification Methods

ÖZÇELİK Ö., Gundogan M., KAHRAMAN S.

TEKNIK DERGI, vol.24, no.3, pp.6471-6478, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 3
  • Publication Date: 2013
  • Journal Name: TEKNIK DERGI
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.6471-6478
  • Keywords: Estimation of modal parameters, steel model bridge, system identification, experimental/operational modal analysis, structural health monitoring
  • Dokuz Eylül University Affiliated: Yes

Abstract

Civil engineering structures are exposed to different external effects which change their dynamic characteristics. The fact that damage can alter stiffness, and/or energy dissipation capacity of a structure which in turn results in detectable changes in its vibration signature is the underlying principle of vibration-based structural health monitoring (SHM). An important step of SHM process is the estimation of modal parameters. In this study, modal parameters of a steel bridge are estimated using ERA and NExT-ERA system identification techniques. A calibrated finite element model of the bridge is obtained using the estimated modal parameters. Accurate damage identification of a structure depends on accurate estimation of modal parameters. The calibrated model in the future can be used to assess the parameters affecting modal parameter estimation therefore accurate damage identification.