The article considers the issue of modeling joints in thin-walled steel structures, which are actively used in construction, mechanical engineering and other branches of engineering. These structures are characterized by high efficiency and economy, however, their mechanical characteristics and features of the interaction of individual elements require detailed analysis to ensure reliability and durability. Bolted joints are one of the key methods of fixing elements of such structures, as they provide strength, ease of installation and the possibility of replacing components. The research focuses on the development and improvement of numerical models that describe the operation of bolted joints in real operating conditions. The use of numerical methods allows predicting the behavior of joints, assessing their strength and determining factors that affect the accuracy of calculations. Special attention is paid to the analysis of geometric parameters and material characteristics of the connected elements, as well as their impact on the effectiveness of structural solutions. A special place in the study is occupied by the issue of model verification, because the reliability of numerical methods must be confirmed by comparison with experimental data. The article considers the possibilities of using various computational complexes to assess the correctness of models, as well as analyze their compliance with real tests. An important aspect is the consideration of dynamic monitoring of the condition of joints, which allows ensuring the safety of structural operation and preventing potential emergency situations. The results of the study confirm the effectiveness of the applied models and methods, and also open up prospects for further improvement of approaches to design and optimization of structures. The results obtained can be used in practical engineering solutions, which will contribute to increasing the reliability of joints in difficult operating conditions.