Аңдатпа
The railway transport of the Republic of Kazakhstan is a unique system operating in extremely diverse natural and climatic conditions. Ensuring safe functioning of this system is a complex and multifaceted task. Track facilities are an important part of railway transport. The main task of track facilities is the current maintenance and repair of railroad track and artificial structures. Condition of railway track and artificial structures is a priority object of track facilities management, the main result of its activity. The maintenance of artificial constructions and subgrade in a condition that ensures its operation without any restrictions, under their normal operation and possible extreme effects on the object is one of the most important tasks. The purpose of this study was to ensure the reliable operation of artificial structures, and bringing them into conformity with the requirements of the Rules of technical operation of railroads of the Republic of Kazakhstan. The paper presents the results of determining the stresses and dynamic coefficients of the girder bridges from the effects of static and dynamic loads, obtained by using the hardware-software complex, which implements the interpretation and processing of the digital record of the primary transducers based on tensometry tools. The dependences of the stressed state of girder spans of railway overpasses of various designs under the static loading from the rolling stock have been obtained. The diagrams of the dynamic coefficients change at the passage of the rolling load along the span in different speed modes are given. The results of the study are recommended to be used for examinations and tests of the typical girder spans of the bridges, as well as in case of monitoring of their technical state under the increasing operational loads.