Modal Parameter Estimation of Model Steel Bridge Using System Identification Methods

ÖZÇELİK Ö., Gundogan M., KAHRAMAN S.

TEKNIK DERGI, cilt.24, sa.3, ss.6471-6478, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 3
  • Basım Tarihi: 2013
  • Dergi Adı: TEKNIK DERGI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.6471-6478
  • Anahtar Kelimeler: Estimation of modal parameters, steel model bridge, system identification, experimental/operational modal analysis, structural health monitoring
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

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.