Operational Modal Analysis: the CEME Skywalk at UBC, Vancouver

Capraro, Ilaria (2012) Operational Modal Analysis: the CEME Skywalk at UBC, Vancouver. [Laurea magistrale], Università di Bologna, Corso di Studio in Civil engineering [LM-DM270], Documento ad accesso riservato.
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Slender and lighter footbridges are becoming more and more popular to meet the transportation demand and the aesthetical requirements of the modern society. The widespread presence of such particular structures has become possible thanks to the availability of new, lightweight and still capable of carrying heavy loads material . Therefore, these kind of structure, are particularly sensitive to vibration serviceability problems, especially induced by human activities. As a consequence, it has been imperative to study the dynamic behaviour of such slender pedestrian bridges in order to define their modal characteristics. As an alternative to a Finite Element Analysis to find natural frequencies, damping and mode shape, a so-called Operational Modal Analysis is a valid tool to obtain these parameters through an ambient vibration test. This work provides a useful insight into the Operational Modal Analysis technique and It reports the investigation of the CEME Skywalk, a pedestrian bridge located at the University of British Columbia, in Vancouver, Canada. Furthermore, human-induced vibration tests have been performed and the dynamic characteristics derived with these tests have been compared with the ones from the ambient vibration tests. The effect of the dynamic properties of the two buildings supporting the CEME Skywalk on the dynamic behaviour of the bridge has been also investigated.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Capraro, Ilaria
Relatore della tesi
Correlatore della tesi
Corso di studio
Curriculum: Structural engineering
Ordinamento Cds
Parole chiave
footbridge, dynamics, vibration, human-induced, ambient vibration test, resonance, natural frequency, mode shape, damping, dynamic characteristics, operational modal analysis, modal analysis, modal testing
Data di discussione della Tesi
5 Ottobre 2012

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