Features of the application of combined steel-reinforced concrete floors based on lightweight steel thin-walled structures in seismic-prone regions

Introduction. The article is devoted to the study of the features of the use of combined steel-reinforced concrete floors made on the basis of lightweight steel thin-walled structures in the construction of buildings in seismic areas. These structures are lightweight, have a high load-bearing capacity relative to their own weight and accelerate the construction process. Together, these properties make them a competitive alternative to traditional technologies used in the construction of buildings erected in seismic areas. The aim of the study is to review, demonstrate the current progress, problems and future directions of research, features of the use of combined steel-reinforced concrete floors of buildings based on lightweight steel thin-walled structures in seismic areas. Materials and methods. A systematic review and analysis of domestic and international studies on the seismic resistance of composite steel-reinforced concrete floors based on lightweight steel thin-walled structures were conducted. The study used systematization, structural, comparative, and correlational analyses, as well as theoretical generalization of materials obtained from normative and technical documents and research literature regarding the seismic performance of these floors. Results. The findings of experimental studies on the seismic resistance of composite steel-reinforced concrete floors based on lightweight steel thin-walled structures were reviewed and summarized. Current achievements, pressing challenges, and future research directions were demonstrated. The analysis confirms that these floors offer a competitive and effective solution for construction of buildings being erected in regions prone to seismic activity. The synergy between the steel frame, profiled decking, and concrete layer ensures an optimal balance of stiffness and ductility, which is critical for resisting seismic loads and ensuring structural reliability and mechanical safety. However, the lack of normative documents regulating the design of such floors in seismic regions hinders their broader adoption in construction practices. Conclusions. The study confirms the necessity for theoretical and experimental research, as well as the development and refinement of normative and technical documents. These efforts will facilitate the wider application of composite steel-reinforced concrete floors based on lightweight steel thin-walled structures, ensuring the reliability and mechanical safety of buildings constructed with their use, particularly in regions prone to seismic activity.