Introduction. The analysis of foreign studies of seismic resistance of frame-sheathing partitions with a frame made of cold-formed galvanized steel sections with a frame made of cold-formed galvanized steel sections and sheathing panels made of gypsum-based sheet materials is performed. The relevance of the study is shown and the problems of standardization limiting the widespread use of frame-sheathing partitions in seismically hazardous areas are identified. This article is the first in a series of articles devoted to the study of seismic resistance of frame-sheathing partitions with a frame made of cold-formed galvanized steel profiles and sheathing panels.

Materials and methods. The designs of the samples were adopted based on the stated goal and objectives of the experimental studies and the results of the review and analysis of modern scientific, technical, regulatory, and methodological literature. The experimental samples reproducing the most common design solutions for frame-sheathing partitions used in construction practice were taken as a basis. Experimental studies included testing of frame-sheathing partitions with a frame made of cold-formed galvanized steel sections, sheathed with plasterboard panels, under the action of quasi-static alternating cyclic loads simulating seismic effects.

Results. Within the framework of this work, experimental studies of the seismic resistance of frame-sheathing partitions with a frame made of cold-formed galvanized steel sections and sheathing panels made of gypsum-based sheet materials were carried out.

Based on the results of experimental studies, destructive loads were determined, damage and failure patterns of samples were established, limiting values ​​of distortions were determined, and the nature of sample failure under alternating quasi-static loads simulating the stress-strain state of the partition arising from seismic effects was established.

Conclusions. The test results confirm the seismic resistance of the tested structures of frame-sheathing partitions. The obtained data can be used for the development and updating of regulatory and technical documents, as well as for the design and construction of frame-sheathed partitions with a steel cold-formed galvanized profile frame and sheathing panels made of gypsum-based sheet materials in seismic regions.

Introduction. The article considers the behavioral features, identifies the advantages and disadvantages of steel-timber composite floor structures based on multilayer cross-laminated timber panels. The relevance of the study is shown and the problems limiting the widespread use of steel-timber composite floor structures in seismically hazardous areas are identified.

Materials and methods. A systematic review and analysis of domestic and foreign studies of the seismic resistance of steel-timber composite floor structures based on multilayer cross-laminated timber panels was performed. The article uses systematization, structural, comparative and contrastive analyses, theoretical generalization of materials obtained from the analysis of domestic and foreign regulatory and technical documents, as well as literary sources containing information on the results of studies of the seismic resistance of steel-timber composite floor structures based on multilayer cross-laminated timber panels.

Results. The article reviews and summarizes the results of experimental studies of seismic resistance of steel-timber composite floor structures based on multilayer cross-laminated timber panels. Current achievements, current problems and promising areas for further research are demonstrated. The analysis results confirm that steel-timber composite floor structures based on multilayer cross-laminated timber panels provide a competitive and effective solution for the construction of buildings in seismically hazardous areas. The study results confirm that the effective interaction of steel beams and multilayer cross-laminated timber panels provides an optimal balance between rigidity and ductility of the combined steel-reinforced concrete metal-wood floor structure, which is especially important for resisting seismic loads and ensuring the reliability and mechanical safety of the building. However, the lack of regulatory documents governing the design of steel-timber composite floor structures based on multilayer cross-laminated timber panels for buildings erected in seismic zones limits their widespread implementation in construction practice.

Conclusions. The need for theoretical and experimental research, development and improvement of regulatory and technical documents is confirmed, which will expand the use of steel-timber composite floor structures based on multilayer cross-laminated timber panels, ensuring the reliability and mechanical safety of buildings erected using them, including in seismic zones.

The devastating earthquakes that have occurred over the past twenty years on the territory of Russia and many foreign countries have made adjustments to the assessment of the expected magnitude of seismic intensity. Under the current conditions, it is especially important to carry out a set of constructive antiseismic measures in operated buildings. This article provides a review and analysis of scientific, technical, regulatory, methodological Russian and foreign literature on ensuring earthquake resistance of structures of buildings and structures. The procedure for conducting a study of the elastic-plastic work of structural elements of a building using energy absorbers under seismic loads is presented.