This article presents data on the impact of non-loadbearing structures on the amplitude-frequency characteristics of frame buildings during dynamic tests using low-intensity loads. On the basis of experimental studies, it is proposed to introduce a correction factor to the experimentally determined period of the building’s natural oscillations. In addition, proposals are made in which cases it is advisable to conduct dynamic tests using lowintensity loads.

Investigated the influence of the external reinforcement system by composite materials based on carbon fibers on the carrying capacity of construction with walls of brick masonry under seismic loading. Defined the mechanism of working of the reinforced samples and identified basic construction requirements, which helps increase seismic stability. The method of calculation of carrying capacity of brick masonry reinforced composite materials is presented.

According to the existing practice of composite structure design, shear connectors, which provide an interaction of supporting steel beams and reinforced concrete slabs, can be considered as ductile or non-ductile. Taking into account the ductility of connectors allows designer to create an optimal structure from an economic point of view and increase its earthquake resistance. Within the framework of this study, the results of push-testing composite specimen conducted by the authors earlier are considered. The powder-actuated shear connectors had been used for providing interaction between the steel and reinforced concrete parts. In conclusion, the assessment of the ductility and expediency of using powder-actuated shear connectors for earthquake-resistant construction is given.

The purpose of this work is to study the load-bearing capacity, deformability, and energy intensity of compressed reinforced concrete structures with spiral reinforcement. Experimental and theoretical studies have shown that the use of reinforced concrete structures with spiral reinforcement will significantly increase their deformability and energy intensity. This paper presents the results of an analysis of experimental studies of the stress-strain state of samples of 100x100x400 mm prisms made of concrete of classes B20 and B40 with spiral reinforcement with different pitches of turns and diameter of the reinforcement.

Increasing the seismic resistance of structural systems of buildings and structures, as well as the bearing capacity of structures subjected to high-intensity dynamic impacts, is an important task. At the moment, there are traditional methods of protection against such impacts that ensure the reliability and safety of both individual structures and buildings as a whole by increasing mainly the geometric and strength properties of the material of load-bearing structures. However, the use of such methods leads to an increase in the cost and material intensity of construction.

The purpose of this work is to further study the stress-strain state of reinforced concrete structures with spiral reinforcement. In this article, in addition to the results given in [2], the results of experimental studies of samples of prisms 100 x 100 x 400 mm and 200 x 200 x 800 mm made of concrete of classes B20 and B40 reinforced with spirals with different pitch turns and diameter are presented.

This article presents the results of the analysis of previously conducted studies of the stress-strain state of bent reinforced concrete structures with reinforcement of the compressed zone with spirals with a pitch of turns of 30, 50, 75, 100 and 150 mm. In addition, data on numerical studies of bent beams with rod and spiral reinforcement of the compressed zone using the finite element method in the Ansys Mechanical software package are presented. The obtained results due to the work of concrete in spirals in a complex stressed state can significantly increase the seismic resistance of buildings, as well as the bearing capacity of monolithic and precast reinforced concrete structures under the action of high-intensity dynamic loads.