Abstract
The article presents a numerical dynamic analysis of the stress-strain state of a railway bridge under load from a moving train. The aim is to evaluate the reaction of reinforced concrete superstructures to dynamic loads from rolling stock with increased axial loads, which is a development of previous static studies. A spatial finite element model has been created in the MIDAS Civil environment that takes into account geometry, material properties, boundary conditions, and the interaction of elements. Loads from a moving train were modeled using dynamic scenarios based on locomotive-wagon configurations, speed, and axial distances. The analysis of the dynamic response revealed the influence of dynamic effects on the stress-strain state, with an increase in stress levels compared to static scenarios. The study highlights the importance of dynamic analysis for the safe operation of railway bridges under conditions of increased loads and speeds, and can be used to evaluate, monitor, design, and improve computational approaches.