Identification of weak non-linearities in cables of cable-stayed footbridges

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Tipo di pubblicazione: Articolo su rivista
Tipologia MIUR: Contributo su Rivista > Articolo in rivista
Titolo: Identification of weak non-linearities in cables of cable-stayed footbridges
Autori: Kumar A., Zanotti Fragonara L.
Autori di ateneo:
Editore: Inderscience Publisher Enterprises Ltd
Volume: 1
Numero: 3
Intervallo pagine: pp. 292-313
Numero di pagine: 22
ISSN: 2043-8648
Abstract: A time-frequency identification technique for the non-linear identification of a cable element was proposed in this paper. A polynomial form of non-parametric method was used. A long cable of a newly constructed cable-stayed footbridge was modelled in the ANSYS structural software. The model was reduced to a SDoF system, by applying a harmonic force in the first modal frequency and the first mode shape. A good match between the identified and numerical data was obtained. Some interesting non-linear phenomena were observed: only a cubic type of non-linearity was identified. Moreover, the values of the damping and cubic parameters stabilised at higher load amplitudes. However, parameter relevant to linear-frequency was increasing with the loading amplitude showing a typical hardening behaviour of cable structures. Superharmonics were present in the response at higher loading amplitudes. Therefore, the identification procedure was found to be effective at higher load amplitudes
Data: 2013
Status: Pubblicato
Lingua della pubblicazione: Inglese
Parole chiave:
Dipartimenti (originale): DISEG - Dipartimento di Ingegneria Strutturale, Edile e Geotecnica
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    Data di deposito: 03 Dic 2013 12:02
    Data ultima modifica (IRIS): 07 Gen 2014 11:51:33
    Data inserimento (PORTO): 31 Ott 2014 10:41
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