Analysis of the crisis-deformed state and dynamic operation of reinforced concrete sleepers

Due to the vibration (dynamic) effect on the path of the load from the rolling stock, reinforced concrete sleepers cannot withstand. Hidden and obvious defects appear in them, sometimes leading to their complete destruction. The article presents the results of a computational analysis of prestressed reinforced concrete sleepers performed using finite element mechanical and mathematical modeling in the ANSYS 2021 R2 program. Comparative strength static and dynamic calculations were performed for experimental sleeper samples of “version 1 concrete grade B40” (type Sh-1) and “version 2 concrete grade B50” (type SH-2). The results of laboratory and full-scale (operational) tests of prestressed reinforced concrete sleepers after their installation on experimental sections of the railway line are presented. The purpose of this study was to identify the main causes of cracking and failure of reinforced concrete sleepers, in order to produce improved samples of prestressed concrete sleepers. The economic development of the railways of the Republic of Kazakhstan, as well as the operational safety of passengers and cargo, directly depends on this.