چكيده به لاتين
The amount of loads transferred from the rail to the underneath slab is the main parameter in the design of railway concrete slabs. Despite several investigations made into the rail seat load distribution in the ballasted railway tracks, there is a lack of sufficient studies into the loads transferred from the rail to the underneath slab in the railway ballast-less tracks. In response to this need, a comprehensive experimental investigation was conducted in this research. The effects of the main influencing parameters including rail bending modulus, track stiffness, train speed, and wheel load on the amount of rail seat loads were investigated. The result obtained were analyzed, leading to develop a mathematical expression for the rail seat load as a function of train speed, wheel load and track stiffness. The load distribution pattern of the rail seat loads on the concrete slab was derived. The reliability and accuracy of the currently used rail-seat load expressions in the analysis and design of concrete railway slabs were evaluated, leading to practical suggestions for improvement of the current practice.
Keywords: Rail seat load, Concrete slab, Track stiffness, Train speed, Rail bending modulus, Wheel load
