Use of non-linear localization for isolating structures from earthquake-induced motions

Vakakis, AF; Kounadis, AN; Raftoyiannis, IG

dc.contributor.author	Vakakis, AF	en
dc.contributor.author	Kounadis, AN	en
dc.contributor.author	Raftoyiannis, IG	en
dc.date.accessioned	2014-03-01T01:15:22Z
dc.date.available	2014-03-01T01:15:22Z
dc.date.issued	1999	en
dc.identifier.issn	0098-8847	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13460
dc.subject	Base isolation	en
dc.subject	Non-linear localization	en
dc.subject	Non-linear modes	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Engineering, Geological	en
dc.subject.other	Buildings	en
dc.subject.other	Dynamic response	en
dc.subject.other	Seismic waves	en
dc.subject.other	Stiffness	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Base isolation	en
dc.subject.other	Nonlinear localization	en
dc.subject.other	Earthquake resistance	en
dc.subject.other	earthquake engineering	en
dc.subject.other	multistorey building	en
dc.subject.other	seismic isolation	en
dc.subject.other	seismic response	en
dc.title	Use of non-linear localization for isolating structures from earthquake-induced motions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/(SICI)1096-9845(199901)28:1<21::AID-EQE802>3.0.CO;2-K	en
heal.identifier.secondary	http://dx.doi.org/10.1002/(SICI)1096-9845(199901)28:1<21::AID-EQE802>3.0.CO;2-K	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The dynamic response due to earthquake-induced excitations of multi-storey buildings simulated by a cantilever (with attached concentrated masses) supported on a flexible foundation, is reconsidered when stiffness non-linearities are included. To this end, a suitable non-linear spring-mass device is placed between the ground and the mass of the foundation, which under certain conditions can absorb a significant amount of seismic energy over a large frequency range, thus drastically reducing the seismic response of the foundation. This is achieved by the stiffness non-linearity that gives rise to a localization phenomenon, according to which motions generated by external disturbances remain passively localized close to the point of seismic excitation instead of 'spreading' to the entire structure. The implications of these findings to the design of earthquake-resistant structures are discussed.The dynamic response due to earthquake-induced excitations of multi-storey buildings simulated by a cantilever (with attached concentrated masses) supported on a flexible foundation, is reconsidered when stiffness non-linearities are included. To this end, a suitable non-linear spring-mass device is placed between the ground and the mass of the foundation, which under certain conditions can absorb a significant amount of seismic energy over a large frequency range, thus drastically reducing the seismic response of the foundation. This is achieved by the stiffness non-linearity that gives rise to a localization phenomenon, according to which motions generated by external disturbances remain passively localized close to the point of seismic excitation instead of 'spreading' to the entire structure. The implications of these findings to the design of earthquake-resistant structures are discussed.	en
heal.publisher	John Wiley & Sons Ltd, Chichester, United Kingdom	en
heal.journalName	Earthquake Engineering and Structural Dynamics	en
dc.identifier.doi	10.1002/(SICI)1096-9845(199901)28:1<21::AID-EQE802>3.0.CO;2-K	en
dc.identifier.isi	ISI:000077852500002	en
dc.identifier.volume	28	en
dc.identifier.issue	1	en
dc.identifier.spage	21	en
dc.identifier.epage	36	en