Längskraftabtragung auf Eisenbahnbrücken - Teil 2: Hintergründe des Nachweises

Track-bridge-interaction - Part 2: backgrounds of the verification method

Track-bridge-interaction has a major influence on the structural design of railway bridges. In the first part of this paper (see Vol. 93 (2016), No. 2) a brief overview describing the historical development of the consideration of the interaction effects has been given. Furthermore, basic principles of the calculation model as well as recommendations on how to deal with the results of the calculation has been presented. The aim of the second part of this article is to show the backgrounds of the verification scheme and especially to explain where the limit values for the additional rail stresses and deformations come from. It becomes apparent, that most rules contained in national and international codes are based on investigations carried out in the 1980s. An actualisation and further development of the codes is necessary, but can only be achieved if the well-proven methods and limits used so far are well understood. This part of the article describes the actual status quo based on a literature research and gives outlines for future research needs.