Effect of base uplift on dynamic response of SDOF structures

Psycharis Ioannis, N

dc.contributor.author	Psycharis Ioannis, N	en
dc.date.accessioned	2014-03-01T01:08:20Z
dc.date.available	2014-03-01T01:08:20Z
dc.date.issued	1991	en
dc.identifier.issn	0733-9445	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10421
dc.subject	Dynamic Response	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Earthquake Resistance--Analysis	en
dc.subject.other	Mathematical Techniques--Numerical Methods	en
dc.subject.other	Structural Analysis--Dynamic Response	en
dc.subject.other	Base Uplift	en
dc.subject.other	Single Degree of Freedom Structures	en
dc.subject.other	Foundations	en
dc.title	Effect of base uplift on dynamic response of SDOF structures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-9445(1991)117:3(733)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-9445(1991)117:3(733)	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	The effect of base uplift on the maximum response of single-degree-of-freedom (SDOF) structures is examined in this paper. A parametric investigation performed for the case of a rigid foundation and a harmonic excitation shows that the maximum deformation is greatly affected by the ratio of the period of the structure to the period of the excitation, while the effects of the amplitude of the excitation, the slenderness of the structure, and its damping are much less. Based on these results an empirical formula for the estimation of the peak response is established. Using this formula and the classical response spectrum, derived for the fixed-base system, an approximate method is proposed for the estimation of the maximum earthquake deformation with base uplift. The simplified method can also be applied to the case of a flexible foundation, under certain substitutions, based on the classical theory of soil-structure interaction. Using modal decomposition, the response of multi-degree-of-freedom systems can also be predicted. The results show that uplift is beneficial to the structure for a wide range of natural periods but leads to a larger response for short periods.	en
heal.publisher	ASCE-AMER SOC CIVIL ENG	en
heal.journalName	Journal of structural engineering New York, N.Y.	en
dc.identifier.doi	10.1061/(ASCE)0733-9445(1991)117:3(733)	en
dc.identifier.isi	ISI:A1991EZ15600007	en
dc.identifier.volume	117	en
dc.identifier.issue	3	en
dc.identifier.spage	733	en
dc.identifier.epage	754	en