Seismic soil-structure interaction: Beneficial or detrimental?

Mylonakis, G; Gazetas, G

dc.contributor.author	Mylonakis, G	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T01:50:20Z
dc.date.available	2014-03-01T01:50:20Z
dc.date.issued	2000	en
dc.identifier.issn	1363-2469	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26020
dc.subject	soil-structure interaction	en
dc.subject	earthquake	en
dc.subject	ductility	en
dc.subject	inelastic response	en
dc.subject	seismic regulations	en
dc.subject	bridge	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	BRIDGE COLUMNS	en
dc.subject.other	DESIGN	en
dc.subject.other	PIERS	en
dc.title	Seismic soil-structure interaction: Beneficial or detrimental?	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The role of soil-structure interaction (SSI) in the seismic response of structures is reexplored using recorded motions and theoretical considerations. Firstly, the way current seismic provisions treat SSI effects is briefly discussed. The idealised design spectra of the codes along with the increased fundamental period and effective damping due to SSI lead invariably to reduced forces in the structure. Reality, however, often differs from this view. It is shown that, in certain seismic and soil environments, an increase in the fundamental natural period of a moderately flexible structure due to SSI may have a detrimental effect on the imposed seismic demand. Secondly, a widely used structural model for assessing SSI effects on inelastic bridge piers is examined. Using theoretical arguments and rigorous numerical analyses it is shown that indiscriminate use of ductility concepts and geometric relations may lead to erroneous conclusions in the assessment of seismic performance. Numerical examples are presented which highlight critical issues of the problem.	en
heal.publisher	IMPERIAL COLLEGE PRESS	en
heal.journalName	JOURNAL OF EARTHQUAKE ENGINEERING	en
dc.identifier.isi	ISI:000088906500002	en
dc.identifier.volume	4	en
dc.identifier.issue	3	en
dc.identifier.spage	277	en
dc.identifier.epage	301	en