ABSTRACT
This chapter describes a static track model that has been developed to predict rail roll deflections resulting from the wheel/rail forces exerted by a number of adjacent trucks. A particular problem of rail rollover derailments with articulated cars is discussed in order to provide a background to the reason for the model development. Details of the model are described followed by predictions of rail head lateral deflections and fastener vertical loads. The rail roll model has a number of non-linearities. The model was used to predict the lateral rail head deflections and fastener vertical loads resulting from five car articulated and conventional cars. The primary objective of this study was to determine how many adjacent trucks were required to create the conditions necessary for rail rollover. Predictions from the model have shown the importance of the number of adjacent trucks that are exerting overturning moments on the rail.
