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Author(s):	Ruge, P.; Widarda, D. R.; Birk, C.
Title:
Abstract:	Dieser Beitrag gilt dem Problemkreis “Abtragung von Längskräften auf Eisenbahnbrücken mit durchgehend geschweißtem Gleis”. Im Mittelpunkt stehen dabei die zusätzlichen Beanspruchungen zu den jahreszeitlichen Temperaturveränderungen, die sich bei der Zugüberfahrt infolge des Steifigkeitswechsels der Kopplung zwischen Gleis und Brückentragwerk ergeben. Dieses Phänomen wird zunächst an einem einfachen Ersatzsystem mit zwei Freiheitsgraden beschrieben und rechnerisch dargestellt. Statische und dynamische Parameterstudien an einem realitätsnäheren Gleis-Tragwerk-Modell zeigen die Entwicklung der Schienenlängsspannungen und horizontalen Brückenauflagerkraft für die Lastfolge jahreszeitlicher Temperaturwechsel - Biegung des Tragwerks - Wechsel der Koppelsteifigkeit unter Einbeziehung der Verformungsgeschichte. Longitudinal rail forces on railway bridges during passing of trains. This paper is devoted to the field of longitudinal forces on railway bridges with continuously welded rails. Here, the focus is placed on stresses additional to those from seasonal temperature change due to the sudden change of the coupling stiffness between track and bridge when a train is running along the bridge. This phenomenon is first explained and realized numerically by means of a simplified two degree of freedom system. Parameter studies, statically as well as dynamically, for a more realistic track-bridge model demonstrate the development of the longitudinal rail stresses and the horizontal bridge-support forces for the loading sequence seasonal temperature change - bending of the bridge - change of coupling stiffness with paying attention to the deformation history.
Source:	Bautechnik 86 (2009), No. 11
Page/s:	677-694
Language of Publication:	German

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