The effective use of high-strength reinforcement in reinforced concrete structures is an important task today. In order to reduce the consumption of materials, especially steel, it is necessary to use high-strength materials more widely in the production of reinforced concrete structures. In recent years, researchers have significantly increased interest in reinforced concrete structures with mixed reinforcement. To determine the effect of the concrete class on the bearing capacity of reinforced concrete columns, a numerical experiment was performed. According to the results of the experiment, it was found that the maximum increase in bearing capacity with all variants of relative eccentricity is observed in racks with previously stretched and non-tensile reinforcement. Thus, the studies showed that the use of columns with mixed reinforcement is advisable. The use of mixed reinforcement in reinforced concrete racks in all cases is more effective than racks with non-tensile reinforcement.

Keywords: concrete, reinforcement, reinforced concrete, prestressing, the relative eccentricity, mixed reinforcement, column, bearing capacity

In the view of most people, the criterion "high-rise buildings" is very blurred. Five or seven storey buildings were considered one or two centuries ago to be tall, but now you will not surprise anyone with a number of storeys over fifty. Russian law sets the maximum possible 75-meter height for residential buildings and 50-meter - for public buildings. The construction of higher facilities is subject to special requirements. The article discusses the development of high-rise buildings of a megalopolis using the example of the city of Rostov-on-Don, presenting famous high-rise buildings in Rostov at present. Along with increasing the number of storeys of buildings, their design features are also changing. The types of structural schemes of high-rise buildings, the materials of the supporting structures of high-rise buildings, their advantages and applications are described. The problems that arise in high-rise construction are described.

Keywords: Rostov-on-Don city, high-rise construction, number of storeys, development, urban planning, zoning, architecture, design, high-strength concrete, high-strength reinforcement

In the work it is proposed to use the principle of zonal placement of materials in prefabricated-monolithic bending structures with the use of light concrete, as well as combined reinforcement. The upper (monolithic) layer is preferably made of light concrete of low strength, and the lower (prefabricated elements) - of steel fibre concrete based on light concrete of higher strength. Rod and fibre reinforcement are located in prefabricated elements, which under operating loads will be in stretched zone of bent elements.The results of experimental studies of crack resistance and deformation of steel-fibre-fluorophobetone (SFTB) prefabricated monolithic bending elements on the basis of shoe filler of Kamenskoe deposit of Kabardino-Balkan Republic are presented in the work. Based on analysis of obtained data correlation dependence is derived and character and degree of influence of various factors on crack resistance and deformability of assembled monolithic combined reinforced bending elements is revealed. The following conclusions have been drawn: reinforcement of prefabricated elements of flexable monolithic structures made of tuphobetone with rods and fibres allows to significantly increase their crack resistance; Parameters of combined reinforcement of prefabricated elements, assignment of their geometrical dimensions, as well as dimensions of sections of bent prefabricated-monolithic structures from tuphobetone as a whole can be assigned taking into account correlation dependencies for evaluation of crack resistance obtained from the results of these studies.

Keywords: Stalefibrotaphobetone, monolithic assembly, zonal arrangement, combined reinforcement, reduced reinforcement, strength of monolithic concrete, correlation dependence, crack resistance, deformability, factors, parameters of combined reinforcement

issues of optimization of the structure of the container pneumatic transport system are considered. The expediency of combining the functions of the equipment included in the transport system is shown. A functional diagram of a universal module that performs the functions of all blocks of a pneumatic transport system is presented. A block diagram of a microprocessor control system that provides the functioning of the mechanisms of a universal module is proposed.

Keywords: microprocessor system, pneumatic transport system, transport container, stations of the transport system, control algorithm, structure of the transport system, transport pipeline

An idea is introduced of the directing structures of the director and reflex types that contribute to the formation of air flows, which in a given way contribute to an increase in mechanical power on the shaft of its rotor. These structures can be used to amplify the moment on the rotor shaft by increasing its useful interference with the stator. Qualitative considerations about the influence of the introduced guide structures are confirmed by the introduction and numerical aerodynamic calculations of two modernized designs of a promising vortex wind power installation, considered in the previous works of the authors. The most optimal variant of rotor modernization was selected, which made it possible to increase the power on its shaft by an average of 45% relative to the corresponding power for the design of a wind turbine with an initial rotor shape in the operating range of wind speeds from 1 to 12 m / s. The materials of this article can be used to design the optimum aerodynamic power criterion for the rotor of wind power plants, their stations, as well as integrated power power plants, including a wind power plant as one of the renewable sources of energy.

Keywords: wind power installation, airflow structuring, director-type guide structure, reflex-type guide structure, vortex structure, rotor aerodynamic torque, aerodynamic optimization by the criterion of maximum power, numerical aerodynamic calculation, sliding gr

This article discusses such technology as the Internet of Things and the network control system for remote identification of RFID tags. In the course of the work, the most popular microcontrollers to date were considered, a comparative characteristic was carried out, and the efficiency of use was evaluated, during which the most optimal option for further work was selected. As a result, a system for remote identification of RFID tags was developed, namely, the design of the system and application software, with the ability to obtain information on RFID tags from both PC and smartphones, and the results of use on different operating systems are presented.

Keywords: Internet of Things, microcontroller, NFC module, Arduino, protocol, MQTT, RFID tag, software, data transmission, identification

This article reviews the process of glider motion control system development based on position-trajectorial controller, developed by V.Pshikhopov. A mathematical model of an underwater glider is reviewed briefly, this model uses variable buoyancy for movement. Control system uses position-trajectorial controller which uses two controll variables for straight gliding and turning. The article contains results of modelling the motion control system in various modes such as straight gliding, gliding with turning and following a set of points. A brief description of practical usage of the control system is given.

Keywords: glider, control system, position-trajectorial controller, motion control, mathematical modelling

The article deals with technologies that work with the Internet of things, and their implementation in various industries. The Internet of Things is considered as a higher level automation, therefore, it becomes possible to make automated complex logical decisions related to the choice of the structure of the process and operations, the assignment of technological bases and other similar tasks. A model based on a universal primitive called Actor for concurrent and distributed computing is considered. Covered issues of implementing an agent-based approach for applications of the Internet of things. The necessary condition for the implementation of the IoT model has been established; this is the possibility of scalability and the availability of fault tolerance configuration. To meet the real need for scalability, as well as fault tolerance, Akka provides comprehensive functions in routing, clustering, edging, and retaining agents. The use of the Akka framework for agent implementation has been analyzed.

Keywords: automation, management, technology, analysis, Internet of things, agent, primitive, implementation, toolkit, scalability, Akka, IoT

Today, catalysts based on zeolites containing transition metal ions are being intensively developed, ensuring the selectivity of the reaction of direct oxidation of methane to methanol. In current work, the X-ray absorption spectroscopy complimented with the structural models obtained in frames of the density functional theory were used to study the dependence of the local atomic structure of copper centers in mordenite type zeolites synthesized by solid-phase ion exchange using CuCl and H-MOR, upon the annealing temperature at different stages of synthesis. The typical Cu – O interatomic distances and the corresponding coordination numbers are determined. The dependence of the fraction of copper ions on the zeolite on the annealing temperature was established.

Keywords: EXAFS, DFT, zeolites, solid-phase synthesis, methanol synthesis

The problem of calculating rods for vector perturbations consisting of five components is solved: 1. kinematic transverse vibrations of the left end; 2. kinematic transverse vibrations of the right end; 3. dynamic bending moment at the left end; 4. dynamic bending moment at the right end; 5 dynamic uniformly distributed lateral load along the length of the rod. The transfer functions from each disturbance are obtained separately. Using these functions, we obtained the elements of the spectral matrix for stationary random processes, taking into account their correlation. The most common types of processes are considered: exponentially correlated random process; process with latent periodicity (with characteristic frequency); truncated white noise. The formula for obtaining the dispersion of displacement of sections is shown.

Keywords: rod, harmonic oscillations, natural frequency, kinematic disturbances, dynamic disturbances, transfer function, correlation matrix, random process, delta-correlated random process, latent periodicity, truncated white noise

When developing any technology of repair it is necessary to conduct research mikrolitrazhnyh worn parts of assemblies using metrological equipment. At the moment to improve the accuracy of research the repair company should use the latest measuring system, allowing to carry out a full complex of works on profileration surfaces of worn parts. Such devices include for example profilograph profilometer English company "Taylor Hobson", which allowed to determine the amount of allowance for machining the body of the power steering distributor. As a result, using the data obtained, the technology of repairing the power steering of KAMAZ vehicles was developed.

Keywords: metrological equipment, profilograph-profilometer, micrometer, power steering, repair technology, recovery, wear, distributor, shaft

The article provides an overview and analysis of the best available techniques (BAT) for reducing dust to the atmosphere from enterprises of various industries (mining, fuel industry, ferrous and nonferrous metallurgy, building, livestock production). Dust has the property to settle and adsorb, affects the state of the environment and human health. These factors determine the importance of introducing dust reduction technologies. Methods generated applicable and branch, as well as the main factors limiting the applicability of technologies. Recommendations proposed to improve the implementation of the best available techniques.

Keywords: atmospheric air, dust, best available technique, industry, dust removal equipment

Fibroenothobetons with the use of sawing volcanic tuff were investigated. The compositions of fibropenot phobetons with the use of nylon and basalt fibers have been developed, which allow to significantly reduce shrinkage deformations and increase the strength characteristics of foam phobeton. The maximum increase in compressive strength by 38% and during bending by 110% is observed in samples of fibroenophoto concrete with a reinforcement of 0.6% by volume with basalt fibers. The combination of nylon and basalt fibers is more effective for reducing the shrinkage of foam photon concrete compared to mono-reinforced samples.

Keywords: portland cement, tuff sawing waste, Neopor 400 frother, nylon and basalt fiber, polyheating, foam concrete, fibroenote sand concrete, bending and compression strength, shrinkage

Development of electric energy converters with high energy characteristics is an important scientific and technical task. The solution of this problem is impossible without the use of modern methods of computer modeling. To improve the quality of electricity, filter-compensating devices are used. Develop converters with good energy performance. In this paper, we developed a computer model and circuit of the AC voltage regulator with high-frequency pulse modulation of the output voltage. Methods of digital signal processing and computer simulation are used. In the environment of the software product MATLAB, a program synthesizing the form of voltage at the output of the AC voltage regulator. The program uses a variety of algorithms to control the power keys of the AC voltage regulator. The results of harmonic analysis of the output voltage of the regulator are presented. The study of the AC voltage regulator circuit is performed in the environment of the ORCAD software product. The work of the scheme on the active-inductive load is considered. Electromagnetic processes occurring in the circuit of the AC voltage regulator are investigated. The optimization of the scheme elements is performed. Time diagrams of currents and voltages are obtained. The results of computer simulation can be used in the development of electrical energy converters for electrochemical and electro thermal production.

Keywords: computer simulation; AC voltage regulator; algorithm; high-frequency pulse modulation; time diagrams; transistor key; control system; harmonic composition; damping circuit; thyristor; active-inductive load

The article discusses the dynamic characteristics of mineral wool materials (dynamic modulus of elasticity and stiffness, reduced dynamic stiffness) and the effect on them of porosity and relative deformation of the material. The main objective of the study is to determine the value of the dynamic modulus of elasticity, taking into account its change with time under the action of a long-term static load for calculating the impact noise insulation.

Keywords: mineral wool material, dynamic modulus of elasticity, strength of parts of a structure, sound insulation, ultimate states, construction