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Article: Analytical determination of equivalent modal damping ratios of a composite tower in wind-induced vibrations

TitleAnalytical determination of equivalent modal damping ratios of a composite tower in wind-induced vibrations
Authors
Issue Date1996
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/compstruc
Citation
Computers And Structures, 1996, v. 59 n. 2, p. 311-316 How to Cite?
AbstractWe present two methods to determine the equivalent modal damping ratios of a composite tower under wind-induced vibrations. Different damping characteristics arise from the construction of the tower with two materials; for the lower main part, say of reinforced concrete and an upper part, say of steel. The first method employs a detailed numerical integration procedure in which the static condensed stiffness matrices are established by the transfer matrix method. The damping matrices of the upper and the lower substructures are modelled with the Rayleigh damping formulation. The second method makes use of a simplified approximation of two lumped masses. Computation using the two methods is demonstrated with a numerical example for a composite T.V. tower of a total height 459 m. Results show that, while the detailed method gives good accuracy but demands intensive computation, the approximate method involves simple calculations and produces data of enough precision for engineering applications.
Persistent Identifierhttp://hdl.handle.net/10722/150073
ISSN
2015 Impact Factor: 2.425
2015 SCImago Journal Rankings: 1.710
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHuang, BCen_US
dc.contributor.authorLeung, AYTen_US
dc.contributor.authorLam, KMen_US
dc.contributor.authorCheung, YKen_US
dc.date.accessioned2012-06-26T06:01:24Z-
dc.date.available2012-06-26T06:01:24Z-
dc.date.issued1996en_US
dc.identifier.citationComputers And Structures, 1996, v. 59 n. 2, p. 311-316en_US
dc.identifier.issn0045-7949en_US
dc.identifier.urihttp://hdl.handle.net/10722/150073-
dc.description.abstractWe present two methods to determine the equivalent modal damping ratios of a composite tower under wind-induced vibrations. Different damping characteristics arise from the construction of the tower with two materials; for the lower main part, say of reinforced concrete and an upper part, say of steel. The first method employs a detailed numerical integration procedure in which the static condensed stiffness matrices are established by the transfer matrix method. The damping matrices of the upper and the lower substructures are modelled with the Rayleigh damping formulation. The second method makes use of a simplified approximation of two lumped masses. Computation using the two methods is demonstrated with a numerical example for a composite T.V. tower of a total height 459 m. Results show that, while the detailed method gives good accuracy but demands intensive computation, the approximate method involves simple calculations and produces data of enough precision for engineering applications.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/compstrucen_US
dc.relation.ispartofComputers and Structuresen_US
dc.titleAnalytical determination of equivalent modal damping ratios of a composite tower in wind-induced vibrationsen_US
dc.typeArticleen_US
dc.identifier.emailLam, KM:kmlam@hku.hken_US
dc.identifier.emailCheung, YK:hreccyk@hkucc.hku.hken_US
dc.identifier.authorityLam, KM=rp00134en_US
dc.identifier.authorityCheung, YK=rp00104en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0045-7949(95)00258-8en_US
dc.identifier.scopuseid_2-s2.0-0030129559en_US
dc.identifier.hkuros11665-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030129559&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume59en_US
dc.identifier.issue2en_US
dc.identifier.spage311en_US
dc.identifier.epage316en_US
dc.identifier.isiWOS:A1996TZ17100010-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHuang, BC=7403681875en_US
dc.identifier.scopusauthoridLeung, AYT=7403012697en_US
dc.identifier.scopusauthoridLam, KM=7403656958en_US
dc.identifier.scopusauthoridCheung, YK=7202111065en_US

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