Winkler (1871) presented nearly 140 years ago a book on 'Der Eisenbahn-Oberbau' (which can be translated as 'Constructing a Permanent Way of Railroad'). He suggested to analyse a rail as an infinite beam with the stiffness E(r)J ( E(r) Young's modulus, J moment of inertia of the cross-section of the beam) subjected to a single load P at x = 0 and supported by a foundation being a continuous bedding transferring a line load - lew with k being the bedding coefficient and w the displacement of the rail at a position x. Winkler's solution has some shortcomings for the actual wheel/rail/bedding configuration, namely: In reality a rail, represented as an infinite beam, is supported by a halfspace, which means that a threedimensional configuration exists; The real bedding cannot transmit tension forces. time. The main thrust of this work is to present a complete solution relating the bedding concept with the halfspace concept. This topic is of high practical relevance.
Beams on foundation, Winkler bedding or halfspace - a comparison
Gelagerte Balken: Winkler-Lagerung oder Halbraum - ein Vergleich
Technische Mechanik ; 28 , 2 ; 152-155
2008
4 Seiten, 6 Quellen
Article (Journal)
English
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