Updating of Finite Element Models using static and dynamic optical strains with application to damage assessment

Graziano, Maria (2016) Updating of Finite Element Models using static and dynamic optical strains with application to damage assessment. [Laurea magistrale], Università di Bologna, Corso di Studio in Ingegneria civile [LM-DM270], Documento full-text non disponibile
Il full-text non è disponibile per scelta dell'autore. (Contatta l'autore)


In the recent years, vibration-based structural damage identification has been subject of significant research in structural engineering. The basic idea of vibration-based methods is that damage induces mechanical properties changes that cause anomalies in the dynamic response of the structure, which measures allow to localize damage and its extension. Vibration measured data, such as frequencies and mode shapes, can be used in the Finite Element Model Updating in order to adjust structural parameters sensible at damage (e.g. Young’s Modulus). The novel aspect of this thesis is the introduction into the objective function of accurate measures of strains mode shapes, evaluated through FBG sensors. After a review of the relevant literature, the case of study, i.e. an irregular prestressed concrete beam destined for roofing of industrial structures, will be presented. The mathematical model was built through FE models, studying static and dynamic behaviour of the element. Another analytical model was developed, based on the ‘Ritz method’, in order to investigate the possible interaction between the RC beam and the steel supporting table used for testing. Experimental data, recorded through the contemporary use of different measurement techniques (optical fibers, accelerometers, LVDTs) were compared whit theoretical data, allowing to detect the best model, for which have been outlined the settings for the updating procedure.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Graziano, Maria
Relatore della tesi
Correlatore della tesi
Corso di studio
Curriculum: Strutture
Ordinamento Cds
Parole chiave
Finite Element Model Updating,vibration-based methods,damage assessment,Fiber Bragg Grating sensors,FBGs,FE models,optical fibers
Data di discussione della Tesi
7 Ottobre 2016

Altri metadati

Gestione del documento: Visualizza il documento