000013322 001__ 13322
000013322 005__ 20161114160336.0
000013322 04107 $$aeng
000013322 046__ $$k2009-06-22
000013322 100__ $$aRibeiro C., A.
000013322 24500 $$aDynamic analysis of transition zones on high speed railway lines by explicit analysis methods

000013322 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013322 260__ $$bNational Technical University of Athens, 2009
000013322 506__ $$arestricted
000013322 520__ $$2eng$$aAlong the track there are zones of abrupt changes in track stiffness such as those at transitions from embankment to bridge, between distinct types of railway, from track in an embankment to track in an excavation or in zones with lower unlevelled crossings [1]. Changes in the vertical stiffness of the track induce important variations in the wheel-rail interaction forces, which can put the stability of the wheel-rail contact at risk while contributing to a faster degradation of the track. In this work, a dynamic analysis of the train-tracksoil system is presented for the case of the passage of an ICE2 train through a track stiffness transition induced by stiffness moduli ratios of the foundation soils equal to 5, 10 and 20. For that purpose, a 3D finite element model was developed in the commercial program LS-DYNA in which the differential equations of motion are numerically integrated by explicit analysis methods. The obtained results showed a very significant increase of the dynamic effects at the transition zone with the increase of the speed and of the ratio of the elastic moduli of the foundation soil.

000013322 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013322 653__ $$aHigh speed railways, transition zones, train-track interaction, dynamic analysis, explicit methods Abstract. Along the track there are zones of abrupt changes in track stiffness such as those at transitions from embankment to bridge, between distinct types of railway, from track in an embankment to track in an excavation or in zones with lower unlevelled crossings [1]. Changes in the vertical stiffness of the track induce important variations in the wheel-rail interaction forces, which can put the stability of the wheel-rail contact at risk while contributing to a faster degradation of the track. In this work, a dynamic analysis of the train-tracksoil system is presented for the case of the passage of an ICE2 train through a track stiffness transition induced by stiffness moduli ratios of the foundation soils equal to 5, 10 and 20. For that purpose, a 3D finite element model was developed in the commercial program LS-DYNA in which the differential equations of motion are numerically integrated by explicit analysis methods. The obtained results showed a very significant increase of the dynamic effects at the transition zone with the increase of the speed and of the ratio of the elastic moduli of the foundation soil.

000013322 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013322 720__ $$aRibeiro C., A.$$iDahlberg, T.$$iCalcada, R.$$iDelgado, R.
000013322 8560_ $$ffischerc@itam.cas.cz
000013322 8564_ $$s400873$$uhttps://invenio.itam.cas.cz/record/13322/files/CD470.pdf$$yOriginal version of the author's contribution as presented on CD, section: Dynamic effects on high-speed railway tracks - iii (MS).
000013322 962__ $$r13074
000013322 980__ $$aPAPER