Discrete modelling of vertical track-soil coupling for vehicle-track dynamics

Kouroussis, G; Gazetas, G; Anastasopoulos, I; Conti, C; Verlinden, O

dc.contributor.author	Kouroussis, G	en
dc.contributor.author	Gazetas, G	en
dc.contributor.author	Anastasopoulos, I	en
dc.contributor.author	Conti, C	en
dc.contributor.author	Verlinden, O	en
dc.date.accessioned	2014-03-01T01:35:31Z
dc.date.available	2014-03-01T01:35:31Z
dc.date.issued	2011	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21097
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Analytical expressions	en
dc.subject.other	Contact areas	en
dc.subject.other	Dynamic interaction	en
dc.subject.other	Foundation models	en
dc.subject.other	Frequency independent	en
dc.subject.other	Frequency ranges	en
dc.subject.other	Half spaces	en
dc.subject.other	Lumped mass model	en
dc.subject.other	Mass-spring-damper system	en
dc.subject.other	Numerical example	en
dc.subject.other	Railway track	en
dc.subject.other	Reaction forces	en
dc.subject.other	Soil stiffness	en
dc.subject.other	Soil surfaces	en
dc.subject.other	System models	en
dc.subject.other	Vertical dynamics	en
dc.subject.other	Winkler model	en
dc.subject.other	Dynamic analysis	en
dc.subject.other	Railroad tracks	en
dc.subject.other	Railroads	en
dc.subject.other	Soils	en
dc.subject.other	Geologic models	en
dc.subject.other	dynamic analysis	en
dc.subject.other	finite element method	en
dc.subject.other	foundation	en
dc.subject.other	infinite element method	en
dc.subject.other	numerical model	en
dc.subject.other	railway	en
dc.subject.other	soil-structure interaction	en
dc.subject.other	stiffness	en
dc.title	Discrete modelling of vertical track-soil coupling for vehicle-track dynamics	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.soildyn.2011.07.007	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.soildyn.2011.07.007	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	This paper presents a coupled lumped mass model (CLM model) for the vertical dynamic coupling of railway track through the soil. The well-known Winkler model and its extensions are analysed and fitted on the result obtained numerically with a finite-infinite element model in order to validate the approach in a preliminary step. A mass-spring-damper system with frequency independent parameters is then proposed for the interaction between the foundations, representing the contact area of the track with the soil. The frequency range of track-soil coupling is typically under 100 Hz. Analytical expressions are derived for calibrating the system model with homogeneous and layered half-spaces. Numerical examples are derived, with emphasis on soil stiffness and layering. The dynamic analysis of a track on various foundation models is compared with a complete track-soil model, showing that the proposed CLM model captures the dynamic interaction of the track with the soil and is reliable to predict the vertical track deflection and the reaction forces acting on the soil surface. (C) 2011 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Soil Dynamics and Earthquake Engineering	en
dc.identifier.doi	10.1016/j.soildyn.2011.07.007	en
dc.identifier.isi	ISI:000295746200008	en
dc.identifier.volume	31	en
dc.identifier.issue	12	en
dc.identifier.spage	1711	en
dc.identifier.epage	1723	en