Abstract:

In this study, the railway track stiffness and the effect of the flexural modulus of sleepers on track stiffness were investigated. For this purpose, an extensive literature review, simplified examples, and comparative tests were used. During the tests, standard B70 type prestressed concrete railway sleepers, and the new LCR type sleepers which have been developed in Türkiye, were used. As a result of the study, it has been seen that the new type of sleepers provides an optimum solution in terms of mass and flexural modulus, combining the optimum flexural modulus advantage of wooden sleepers and the high mass and environmental durability advantages of concrete sleepers. In addition, it has been examined whether it can maintain this optimum modulus throughout its service life, and it has been observed that the new type of sleepers largely maintains its flexural modulus during repeated loading steps. In addition, plastic deformations occurring even at high load levels are at least as low as seen in prestressed competitors.

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