Abstract
Dynamic loads from rolling stock are distributed along the entire length of the bridge spans. Therefore, using a limited number of load cells only in the central (most loaded) zone of the span is not enough. The purpose of this work was to determine the stress–strain state of the load-bearing elements of steel girder superstructures and polygonal trusses of railway bridges during the operation of freight rolling stock with increased axial loads. The authors substantiate the expediency of using software and hardware complexes when measuring stresses in the superstructures of bridges designed and built according to the standards of different periods, allowing to take into account the technical characteristics (weight and speed of the train) of the rolling stock passing over the bridge. The construction of correlational dependencies of these characteristics on the controlled parameters of the stress–strain state is the basis of the decision-making system on the load capacity of the structure. The paper also presents the results of measurements of fiber stresses arising in the transverse and longitudinal beams of the roadway and truss belts from the effects of various types of rolling stock. The analysis of the measured fiber stresses during the operation of superstructures made it possible to identify the most defective superstructure structures for the classification of structures by load-bearing capacity.
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Kosenko, S., Bondar, I., Kvashnin, M., Vorobyev, A., Pokrovskaya, O. (2023). Experimental Assessment of the Railway Bridges’ Metal Spans Bearing Elements Stress State. In: Guda, A. (eds) Networked Control Systems for Connected and Automated Vehicles. NN 2022. Lecture Notes in Networks and Systems, vol 509. Springer, Cham. https://doi.org/10.1007/978-3-031-11058-0_33
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