Dynamic impact on the construction of the railway track and on the deformability of the basement

Abstract

The qualitative performance of the track facility in Ukraine depends upon the technical state of rail track structure, which is determined by correspondence of the characteristics to the current Regulations for laying and maintenance the track on railways of Ukraine. And the parameters indicating the rail track stability directly depend on the carrying capacity of the rail base and the stress-strain behavior. The main indicators of the state of the continuous welded rail (in particular, the parameters of the track geometry), deviations from the normative position of the track rails in the profile and in the plan directly depend on the carrying capacity of the under sleeper base, that is, on its deformative properties. In this study, the under sleeper base deformability refers to the ability of the superstructure to operate under conditions of limitation to a certain level of pace (speed) accumulation of the track failures. Determining the level of the dynamic load on the railway track, its effect on the performance of its elements, and the under sleeper base deformability of the continuous welded rail will make it possible to quantify the dynamic effects on the railway track construction and its impact on the under sleeper base deformability.

Using Detailing Concept to Assess Railway Functional Safety

“…The risk assessment of the functional safety [42][43][44][45][46] of any engineering object is associated with the definition of reliability [47][48][49], availability, maintainability, and safety (RAMS) [50,51]. It determines the suitability of objects to perform their functions safely (with defined risk levels at all stages of the life cycle) [25,52,53] and efficiently (with a certain level of costs) under specific operating conditions [54][55][56][57].…”