Application of Composite Sleepers on Railway Bridge Approaches

Abstract

Laying composite sleepers on the approach to the bridge is a scientifically based and proven method of dealing with transitional rigidity. The main effect is achieved by smoothing the jump in elasticity and increased damping, which prolongs the life of the entire structure. The assessment of cyclic strength, elastic and damping properties of composite sleepers under the influence of a variable load simulating the passage of wheelsets was carried out in the loading mode: 60-80 kN (span 20 kN) with frequencies of 5, 10 and 15 Hz. Number of cycles: up to 5000. The results showed that the material is subject to cyclic strengthening. Initial instability (0-200 cycles) is replaced by stable strengthening.