The influence of a train's critical speed and rail discontinuity on the dynamic behavior of single-span steel bridges

Michaltsos, GT; Raftoyiannis, IG

dc.contributor.author	Michaltsos, GT	en
dc.contributor.author	Raftoyiannis, IG	en
dc.date.accessioned	2014-03-01T01:34:46Z
dc.date.available	2014-03-01T01:34:46Z
dc.date.issued	2010	en
dc.identifier.issn	0141-0296	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20841
dc.subject	Axes frequency	en
dc.subject	Bridge dynamics	en
dc.subject	Moving loads	en
dc.subject	Rail discontinuity	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	A-train	en
dc.subject.other	Bridge dynamics	en
dc.subject.other	Bridge spans	en
dc.subject.other	Combined effect	en
dc.subject.other	Continuous approach	en
dc.subject.other	Critical speed	en
dc.subject.other	Dynamic behaviors	en
dc.subject.other	Eigenfrequency	en
dc.subject.other	Impact force	en
dc.subject.other	Lightweight steel	en
dc.subject.other	Moving load	en
dc.subject.other	Theoretical formulation	en
dc.subject.other	Train speed	en
dc.subject.other	Equations of motion	en
dc.subject.other	Locomotives	en
dc.subject.other	Railroad cars	en
dc.subject.other	Tools	en
dc.subject.other	Steel bridges	en
dc.subject.other	bridge	en
dc.subject.other	dynamic response	en
dc.subject.other	impact	en
dc.subject.other	loading	en
dc.subject.other	numerical model	en
dc.subject.other	steel structure	en
dc.subject.other	theoretical study	en
dc.title	The influence of a train's critical speed and rail discontinuity on the dynamic behavior of single-span steel bridges	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.engstruct.2009.11.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.engstruct.2009.11.002	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	In this paper, the influence of train speed on the dynamic behavior of lightweight steel bridges is studied. Moreover, an existing rail discontinuity is also considered and its combined effect on the dynamic behavior of the bridge is taken into account. In particular, this paper studies first the effect of the axis frequency on the bridge dynamic behavior as trains enter into the bridge span, which is coincident or almost coincident with the fundamental eigenfrequency of the bridge. This entrance frequency of the wheels obviously depends on the axis distance and the train's speed. Secondly, a rail discontinuity is considered and its combined effect on the dynamic behavior of the bridge due to the developing impact forces is studied. The theoretical formulation presented herein is based on a continuous approach and the equations of motion of the bridge are determined through the use of a simple two-degrees-of-freedom model. (C) 2009 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Engineering Structures	en
dc.identifier.doi	10.1016/j.engstruct.2009.11.002	en
dc.identifier.isi	ISI:000274878300020	en
dc.identifier.volume	32	en
dc.identifier.issue	2	en
dc.identifier.spage	570	en
dc.identifier.epage	579	en