000021739 001__ 21739
000021739 005__ 20170622131302.0
000021739 04107 $$aeng
000021739 046__ $$k2017-06-15
000021739 100__ $$aKaewunruen, Sakdirat
000021739 24500 $$aDYNAMIC AMPLIFICATION FACTORS FOR RAILWAY TURNOUT BEARERS IN SWITCHES AND CROSSINGS

000021739 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021739 260__ $$bNational Technical University of Athens, 2017
000021739 506__ $$arestricted
000021739 520__ $$2eng$$aRailway infrastructure is nonlinear by nature, scientifically proven by its behaviours, geometry and alignment, wheel-rail forces and operational parameters such as tractive efforts. It is often found that most train-turnout interaction models do not consider the time dependent ballast degradation. Such ballast degradation later causes differential settlement and aggravates impact forces acting on partial and unsupported sleepers and bearers. Furthermore, localised ballast breakages underneath any railseat increase the likelihood of centre-bound cracks in railway sleepers and bearers due to the unbalanced support. This paper presents a numerical simulation of a standard-gauge concrete bearer at crossing panel, taking into account the tensionless nature of ballast support. The finite element model was calibrated using static and dynamic responses using past experiments. In this paper, the influences of topologic asymmetry on dynamic amplification behaviours of crossing bearers under impact loading are firstly investigated. In addition, it is the first to demonstrate the effects of sleeper length on the design consideration of turnout bearers in crossing panel. The outcome of this study will improve the railway turnout construction and maintenance criteria in order to improve train-turnout interaction and ride comfort.

000021739 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021739 653__ $$aRailway, Turnout bearers, Railroad bearers, Prestressing, Impact Analysis, Dynamic Responses, STRAND7.

000021739 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021739 720__ $$aKaewunruen, Sakdirat$$iYou, Ruilin$$iJaneliukstis, Rims$$iNgamkranong, Chayut
000021739 8560_ $$ffischerc@itam.cas.cz
000021739 8564_ $$s268338$$uhttps://invenio.itam.cas.cz/record/21739/files/17734.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS32] Extreme Dynamics
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000021739 962__ $$r21500
000021739 980__ $$aPAPER