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Dynamic behavior of stay cables with rotational dampers / Impollonia, Nicola in Journal of engineering mechanics, Vol. 136 N° 6 (Juin 2010) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 136 N° 6 (Juin 2010) . - pp. 697-709 Titre : Dynamic behavior of stay cables with rotational dampers Type de document : texte imprimé Auteurs : Impollonia, Nicola, Auteur ; Ricciardi, Giuseppe, Auteur ; Saitta, Fernando, Auteur Article en page(s) : pp. 697-709 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Cables  Damping  Eigenvalues  Modal  analysis  Vibration. Résumé : Vibration reduction in stay cables by means of viscous dampers is of great interest in cable damage prevention and serviceability of structural system supported by such cables. The paper presents a study on the effectiveness, as well as the limits, of rotational viscous dampers and springs inserted at the two ends of a bending-stiff taut cable; influence of rotational stiffness of the springs is also investigated. After a nondimensional expression of the equation of motion has been obtained, as in other cases of nonproportionally damped continuous structures, complex modal analysis is pursued, obtaining complex eigenvalues and eigenfunctions. Comparison with intermediate dampers, widely used in bridge engineering, is performed showing the range of nondimensional parameters for which the proposed approach is of interest. Finally, a numerical technique based on complex mode superposition is presented in order to evaluate time domain responses for transversal distributed excitation. As an example, the procedure is applied to a wind-exposed cable. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...] [article] Dynamic behavior of stay cables with rotational dampers [texte imprimé] / Impollonia, Nicola, Auteur ; Ricciardi, Giuseppe, Auteur ; Saitta, Fernando, Auteur . - pp. 697-709. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 6 (Juin 2010) . - pp. 697-709 Mots-clés : Cables  Damping  Eigenvalues  Modal  analysis  Vibration. Résumé : Vibration reduction in stay cables by means of viscous dampers is of great interest in cable damage prevention and serviceability of structural system supported by such cables. The paper presents a study on the effectiveness, as well as the limits, of rotational viscous dampers and springs inserted at the two ends of a bending-stiff taut cable; influence of rotational stiffness of the springs is also investigated. After a nondimensional expression of the equation of motion has been obtained, as in other cases of nonproportionally damped continuous structures, complex modal analysis is pursued, obtaining complex eigenvalues and eigenfunctions. Comparison with intermediate dampers, widely used in bridge engineering, is performed showing the range of nondimensional parameters for which the proposed approach is of interest. Finally, a numerical technique based on complex mode superposition is presented in order to evaluate time domain responses for transversal distributed excitation. As an example, the procedure is applied to a wind-exposed cable. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...]