o:8703 Requirements for Train-Track-Bridge Dynamic Interaction Analysis en The analysis of the dynamic interaction between the train, track, and bridge is crucial for ensuring the performance of railway infrastructure and the safety of railway traffic, especially on high-speed rail systems. This paper examines the key requirements for analyzing the dynamic interaction between the train, track, and bridge, with particular emphasis on the guidelines outlined in UIC Code 776-2. The analysis includes the structural strength of the bridge, passenger comfort, and the overall safety of railway traffic, ensuring a comprehensive evaluation of the entire railway system. Specifically, the paper examines the impact of continuously welded rails, which are widely used in modern railways due to their improved performance and reduced maintenance needs. The dynamic behavior of the train, track, and bridge is analyzed to confirm the structural integrity of the system, mitigate vibrations, and enhance passenger comfort. UIC Code 776-2 serves as a key reference for understanding the design and performance requirements for analyzing train-track-bridge dynamic interaction, guaranteeing that safety standards are met while optimizing efficiency. By evaluating the dynamic performance of the train, track, and bridge components, potential risks can be assessed, and strategies can be developed to mitigate them. This research contributes to the development of more resilient railway systems, ensuring the safety of both passengers and infrastructure. Railway Infrastructure, Continuously Welded Rail, Railway Traffic Safety, Bridge Structural Strength, Passenger Comfort, Engineering Application 1552099 10.62683/SINARG2025.020 1552100 978-86-82810-15-5 2025-12-12T09:35:53.875Z 44 no 46 Nikola Mirković Jaroslav Cerni Water Institute, Belgrade, Serbia 0000-0002-5980-3049 Dušan Stevanović Jaroslav Cerni Water Institute, Belgrade, Serbia person Uroš Mirković Jaroslav Cerni Water Institute, Belgrade, Serbia person 0000-0001-6781-5798 application/pdf 2051194 https://unilib.phaidrabg.rs/o:8703 no yes 1 70 92000004 71A04 Proceedings of the International Conference Synergy of Architecture and Civil Engineering 2025 SINARG2025, 11-12 September 2025, Niš, Serbia 141 151 Faculty of Civil Engineering and Architecture, University of Niš; Serbian Academy of Sciences and Arts – Branch in Niš 2025