Soil-structure interaction effects on base-isolated buildings founded on soil stratum

Spyrakos, CC; Maniatakis, ChA; Koutromanos, IA

dc.contributor.author	Spyrakos, CC	en
dc.contributor.author	Maniatakis, ChA	en
dc.contributor.author	Koutromanos, IA	en
dc.date.accessioned	2014-03-01T01:31:56Z
dc.date.available	2014-03-01T01:31:56Z
dc.date.issued	2009	en
dc.identifier.issn	0141-0296	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19983
dc.subject	Base isolation	en
dc.subject	Multistory building	en
dc.subject	Seismic response	en
dc.subject	Soil-structure interaction	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Buildings	en
dc.subject.other	Earthquakes	en
dc.subject.other	Equations of motion	en
dc.subject.other	Piles	en
dc.subject.other	Seismic design	en
dc.subject.other	Seismic response	en
dc.subject.other	Seismology	en
dc.subject.other	Soil structure interactions	en
dc.subject.other	Stiffness	en
dc.subject.other	Tall buildings	en
dc.subject.other	Base isolation	en
dc.subject.other	Building structures	en
dc.subject.other	Elastic soils	en
dc.subject.other	Frequency-domain (FD)	en
dc.subject.other	Ground motions	en
dc.subject.other	Inertia properties	en
dc.subject.other	Multistory building	en
dc.subject.other	Soil stratum	en
dc.subject.other	Soil-structure interaction	en
dc.subject.other	Soil-Structure Interaction (SSI) effects	en
dc.subject.other	Structure interactions	en
dc.subject.other	Soils	en
dc.subject.other	damping	en
dc.subject.other	ground motion	en
dc.subject.other	multistorey building	en
dc.subject.other	seismic isolation	en
dc.subject.other	seismic response	en
dc.subject.other	soil-structure interaction	en
dc.subject.other	stiffness	en
dc.title	Soil-structure interaction effects on base-isolated buildings founded on soil stratum	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.engstruct.2008.10.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.engstruct.2008.10.012	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The present Study investigates the effects of soil-structure interaction (SSI) on the response of base-isolated multistory buildings founded on all elastic soil layer overlying rigid bedrock and subjected to a harmonic ground motion. Initially a four-degree-of-freedom system (4-DOF) is developed and the equations of motion are formulated in the frequency domain. Frequency independent expressions are used to determine the stiffness and damping coefficients for the rigid surface foundation on the soil-stratum underlined by bedrock at shallow depth. Assuming the foundation mass to be negligible, all equivalent two-degree-of-freedom (2-DOF) system is derived. The first mode of motion of the equivalent 2-DOF system appears to be sufficient to describe the response of the overall system for all ranges of stiffness and inertia properties of the structure and its isolation. An extensive parametric study demonstrates that SSI effects are significant, primarily for squat, light structures, founded on soil-stratum of low stiffness. The methodology could serve as a means to perform a preliminary seismic design of base-isolated building structures founded on homogenous soil-stratum over bedrock. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Engineering Structures	en
dc.identifier.doi	10.1016/j.engstruct.2008.10.012	en
dc.identifier.isi	ISI:000263664000012	en
dc.identifier.volume	31	en
dc.identifier.issue	3	en
dc.identifier.spage	729	en
dc.identifier.epage	737	en