The used mechanisms of management of the construction complex do not provide the desired result in the field of technical equipment of construction. Management of this line of activity is carried out without effective analysis and further planning. Therefore, the creation of integrated organizational structures, with specific tasks facing them, can provide, in the opinion of the authors, a solution to the existing problems identified in the article. It is proposed to create organizational structures of ""Centers of technical equipment of construction"" of two types, the main purpose of which is to increase the level of security of construction with the necessary machines and mechanisms. The used mechanisms of management of the construction complex do not provide the desired result in the field of technical equipment of construction. Management of this line of activity is carried out without effective analysis and further planning. Therefore, the creation of integrated organizational structures, with specific tasks facing them, can provide, in the opinion of the authors, a solution to the existing problems identified in the article. It is proposed to create organizational structures of ""Centers of technical equipment of construction"" of two types, the main purpose of which is to increase the level of security of construction with the necessary machines and mechanisms.

Keywords: centers of technical equipment of construction, machines and mechanisms, a fleet of construction equipment.

The article considers an experimental study of the stress-strain state of radial beam domes. The maximum stress values are fixed in stretched flexible elements with a peak value of 363.6 MPa. With the calculated resistance of the wire material Bp-I Rs = 410 MPa, there is a 12% load-bearing capacity margin. Note the high level of stresses in other flexible elements with values in the range from 141.4 to 274.72 MPa.

Keywords: radial beam dome, experimental studies, loading, strain gages, deformation

The measures aimed at material and technical support are given, as a result of which high performance in housing construction can be achieved. The performance criterion of material and technical support during the construction and installation works is proposed in the form of a reduction in the duration of a project construction, which results in a reduction in the cost of work and resource savings. As an example, the procedure for calculating economic performance by the material and technical support factor during the construction of a large-panel two-section apartment building of variable number of storeys is shown. The calculation measures are based on reducing the necessary stocks of structures at the construction site, as well as reducing the costs associated with their acquisition and storage. It is shown that as a result of the proposed measures in the material and technical support of construction, based only on the main structural components, it is possible to obtain a noticeable economic effect due to a reduction in the dura-tion of construction and in additional costs in the conditions of the construction site.

Keywords: construction, construction and assembly work, large-panel buildings, logistical support, material resource inventory

The article considers the problem of continuous monitoring of the concentration of dust flow in air ducts at enterprises in the production of building materials. A spectral-timbre methodology for estimating dust concentration based on the analysis of acoustic emission signals is proposed. Two stages of adaptation of the simplified assessment of dust concentration on the bench model and in production conditions were carried out. In the process of adaptation, a piezoceramic sensor is used, an acoustic signal from which using a preamplifier is fed to a recording device called potentiometer with a circular daily diagram . The reference weight method was used to measure the actual dust concentration and simultaneously record the readings of an adapting dust meter.

Keywords: building materials, dust concentration, dust measuring equipment, acoustic methodology, acoustic emission signals, Fourier spectrum

This article discusses the possibility of using ceramic materials with a high coefficient of thermal conductivity as a heat sink material to solve the problem of heat removal in heat-loaded elements of electronic equipment, which will significantly improve the thermal characteristics of the devices and the reliability of their operation.

Keywords: normal thermal mode, heat and mass transfer, high temperatures, thermal conductivity coefficient, ceramics

A monolithic plate is the most reliable type of foundation. The design is selected if the future building or structure will stand on a site with difficult soil. Three variants of organizational and technological solutions are considered - a ribbed foundation plate a solid foundation slab and a box-shaped foundation plate For each technology, two options for reinforcement are considered - steel and fiberglass reinforcement. The analysis of existing technologies for the installation of a monolithic foundation plate carried out in the first section of this work, showed that the use of these technologies is hampered by a number of factors related to the design and technological features of the object being built. The choice of a rational technology for the installation of a foundation plate is carried out by assessing the influence of organizational, technological and design factors. Based on the results of a comparative analysis of the methods for constructing a foundation plate, it was revealed that the most rational in terms of labor intensity and cost for the structure under consideration, a reinforced concrete plate 15.6x544 m, is technology No. 1 - a ribbed foundation plate using MSC formwork and reinforcement with fiberglass reinforcement. The analysis of the dependencies obtained and the calculation of the coefficients showed that the factors affecting the laboriousness of the installation of a monolithic foundation plate can be arranged in the following order in terms of significance: 1) structural characteristics (the presence of ribs, a solid slab or the presence of voids); 2) thickness of the foundation plate; 3) type of reinforcement used for reinforcing the foundation plate; 4) the area of the constructed plates.

Keywords: monolithic foundation plate, steel and fiberglass reinforcement, factorial analysis, labor intensity and cost of construction, work performance

This paper presents, developed by the authors of this scientific article, a method for calculating the strength of reinforced concrete out-of-center compressed racks according to the current regulatory methodology according to SP 63.13330.2018. The peculiarity of this technique is the condition that when calculating the strength, an external force is unknown, in turn, the normative methodology, on the contrary, is focused on calculating the cross-sectional area of metal reinforcement, provided that an external force is known in advance. The inverse problem is not provided for by the norms, since it is used mainly for scientific purposes. Consequently, the methodology developed by us is of great value for research work, where an important factor is the determination of the strength of samples for subsequent comparison with the strength of the corresponding reference samples and the development of new proposals for calculation methods. For the convenience of the reader, the developed calculation method is presented as an example of calculating the strength of one off-center compressed reinforced concrete sample, with explanations and references to the formulas of the normative literature. The calculated sample was actually manufactured and tested in the laboratory of the Department of Housing and Communal Services of DSTU and all its characteristics were found experimentally, therefore, the calculation method is based on comparison with the results of experimental studies.

Keywords: steel, heavy concrete, reinforced concrete, test, rack, eccentricity, strength, off-center compression

The design of energy-efficient buildings is based on the analysis of the external climatic effects on buildings for various purposes, the parameters of the air environment inside which are well defined. Climate systems of buildings should neutralize the negative impact of the external environment, in particular wind exposure. It determines both the temperature regime of the room and the purity of the air inside them. The complexity of both theoretical research and the organization of field experiments or blowing models of buildings in a wind tunnel makes it necessary to resort to mathematical modeling of the wind impact on the school building based on the StarCCm+ program. Velocity fields were obtained for different directions of wind load, the excess heat loss of the building in certain directions was determined. The possibility of conducting such studies in a wider range of initial and boundary conditions is shown.

Keywords: aeration of residential buildings, mathematical modeling

The article discusses the various stages of the study of quarry sand as a component of the cement-sand mixture. Two large-scale stages are designated: drying and sieving. The drying stage for different layers (upper, middle, lower) of quarry sand is given. The results of moisture content of sand weighing from 100 to 5000 g for different layers are given. The screening stage for various layers of quarry sand is given. The granulometric (grain) composition of various layers of quarry sand was determined experimentally according to the normative methodology. The results of partial and total residuals for each layer of sand are given. Size moduli are calculated for different layers of sand. The equipment used for drying and screening quarry sand is illustrated. The experimentally theoretical necessity of the preliminary stages of preparation (drying and sifting) of quarry sand before using it as an integral part of the cement-sand mixture for the production of bricks has been confirmed experimentally.

Keywords: quarry sand, drying, drying, sifting, screening, cement-sand mixture, humidity, granulometric composition, particle size modulus

An analysis of existing ceramic materials for high-temperature thermal insulation is presented. The possibility of obtaining a composite based on zeolite-containing raw materials from the Sakhaptinsky deposit with additives for thermal insulation of industrial aggregates is shown. The results of the effect of additives (clay, microsilica, burnable additives and foam-forming emulsion) on the physical-mechanical and firing properties of the resulting products are presented. The main characteristics of the resulting porous ceramics were studied and the optimal limits for the use of the additives used were determined in accordance with the requirements of GOST 2694-78 for the analogical foam-diatomite brick. The effect of clay content in composites on the density, strength and additional linear shrinkage of samples was determined.An optimal composition has been obtained containing microsilica and burnable additives (sawdust) in the manufacture of porous ceramics used for high-temperature thermal insulation with the lowest density and appropriating the requirements of GOST for strength and additional linear shrinkage.

Keywords: zeolite, clay,microsilica, foam-forming emulsion, burnable additives, chemical composition, firing properties, physico-mechanical properties, porous ceramics, waste products, high temperature insulation

The Kama River is the natural axis of the Kama agglomeration and its main link. The development of connectivity of the urbanized territories of the cities of Naberezhnye Chelny, Yelabuga and Nizhnekamsk with their embankments is the key to improving their intra-agglomeration links. The way to strengthen the interaction of cities lies through the analysis of existing problems of embankments, as well as the creation on this basis of a general agglomeration plan for their solution and development of coastal areas. The main purpose of the work is to analyze the current state and identify the problems and opportunities for the development of coastal areas of the cities of the Kama agglomeration, as well as to make proposals for the modernization of the existing urban planning structure of the embankments to improve intra-agglomeration links. The following tasks have been identified: analysis of proposals for the transformation of embankments; study of graphic materials of the master plans of the studied cities in part of the coastal territories in order to identify the main directions of development of their street and road structure and functional zoning; development of proposals to strengthen intra-agglomeration ties by solving existing urban planning problems of coastal areas. The research area is determined by the coastal areas of the Kama agglomeration in the three city boundaries of Naberezhnye Chelny, Nizhnekamsk, Yelabuga. The main problems of coastal areas are poor ecology, low connectivity of transport communications, irrational use of embankments. To achieve the main goal of the Agglomeration Development - the unification of the three cities into a single social and urban structure and strengthening their intra-agglomeration links - it is proposed to build new and re-equip existing ports, develop connectivity of the city's road network with its coastal areas and modernize riverside recreations.

Keywords: agglomeration, Yelabuga, Nizhnekamsk, Naberezhnye Chelny, Kama, embankments, zoning, problems, development, links

The article discusses the various proportions of the components of the cement-sand mixture for the production of bricks for the construction of private houses. Particular attention is paid to the values ​​of the draft of the cone, as one of the indicators of the mixture. Tables are given with a description of the different composition of the mixture for each component. The results of an experiment to study the effect of different ratios of components are presented. The equipment for manual and automatic molding and creation of finished products from the resulting mixture is illustrated. A conclusion is given on the possibility of using a specific mixture in the production of bricks.

Keywords: brick, cement, sand, water, cement-sand mixture, cement mortar, water-cement ratio, composition selection, construction, production

The use of information modeling at all stages of the life cycle of a construction object requires a revision of existing approaches to organizing the work of specialists, a more thorough study of the processes of information exchange, the search for new more effective ways of managing information and organizing the use of models. By the period of operation of the constructed object, a significant amount of various data and documents is generated, and during the operation of the building or structure there is a need to collect and analyze significant amounts of information. Damage detection and prediction of structural behavior, search for the current location of a building element can take a lot of time, and a systematic approach to information flow management will ensure an increase in the efficiency of operation services by reducing costs during unscheduled repairs and increasing the life of buildings. This article discusses a model of the integration process of data received or transmitted by Radio Frequency Identification technology tags and data stored and used in an information model. Tags can be placed on critical structures, in complex nodes or on cracks to monitor their disclosure. The approaches to managing information flows depending on the tasks solved at the operational stage, taking into account the preventive maintenance of building elements, are given.

Keywords: radio frequency identification, building information modelling, building maintenance, digitalization, internet of things, industry foundation classes, maintenance and repair, building condition analysis

The article is the result of an analytical study of the development of structures of medium and small businesses in the engineering implementation of the stages of survey, preparation in the production of building materials, semi-finished products, sections of projects, as well as participants in the commissioning of facilities for 2012-2022. During this period, the number of small and medium enterprises in the territory of the Russian Federation increased by 224 thousand units. In the Central Federal District (which includes the Tula Region), the increase was 31.8%. At the same time, their growth in construction amounted to 6.39%. However, the trend has changed from 2019 to 2022. the number of entrepreneurs significantly decreased by 457 thousand. In this regard, the authors in their studies solved the problem of analyzing the state, dynamics of changes in the number and content of the activities of structures of medium and small businesses in construction; developing proposals to improve development efficiency. The main attention is paid to specialization, the reasons for curbing the growth of business services and the economic results of their work.

Keywords: business planning, specialization, planning, project management, building complex

The article presents a review of research on the subject of the special limiting state, which are of interest for the development of theory and practical applications. The results of the main works, which have not lost their relevance, are briefly presented. Perspective directions of development for improvement of the theory of the special limiting state are distinguished: 1) Taking into account in calculations the stiffness of nodal couplings, individual elements of structures. 2) Consideration of joint operation of prefabricated and prefabricated-monolithic structures, including shear stiffness of compound sections. 3) Consideration of temporal and spatial nature of impact. 4) Work on extension of application of the theory beyond calculations for progressive collapse.

Keywords: special limitstate, special effects, reinforced concrete, deformability, special limit state criteria

The article analyzes the survey results of standard curtain walls with air space (hereinafter – CWs), used in construction industry in the city of Moscow. Despite a large number of advantages, curtain wall ventilated systems have a number of disadvantages, resulting, on the one hand, from the design solution of the CW: heterogeneity, shrinkage and deformation of the insulation layers, water penetration through the lining cracks, etc. On the other hand, failure to meet the CW technology and insufficient development of regulatory support for the design, installation and maintenance of CWs lead to a decrease in their quality. For a number of survey objects, a discrepancy between design and technical solutions was revealed: for the material of the supporting structures; for the material of the brackets; for the material of self-tapping screws; for the material of facing plates. Based on the survey results, it was revealed that it is inappropriate to use facing elements made of fiber cement boards in order to prevent their collapse and ensure the safety of people near the wall systems. Also, it is not advisable to use ""TYVEK House Wrap"" (1060) wind and hydroprotective membranes for installation from the outer surface of the thermal insulation of buildings due to their fire hazard.

Keywords: hinged facade systems, ventilated, facing plates, fasteners, defects, testing, displacement, cracks, chipping, deformation

The results obtained during experimental studies of deflections of reinforced concrete struts of two flexibilities λh = 10 and 20 tested at three load application eccentricities e0=0; 2.0cm (0.16h) and 4.0cm (0.32h) are considered.Theoretical calculations of deflections were performed according to the current set of rules (SP 63.13330.2018). Based on experimental data and calculation results, it was found that the values of theoretical deflections differ significantly from experimental ones. The influence of the eccentricity of the load application and the flexibility of the samples on the convergence of the theoretical and experimental values of the deflections of the images was analyzed, possible causes of the discrepancy were considered and proposals for improving the calculation methodology were developed.

Keywords: "concrete, reinforced concrete, compressed elements, flexibility, eccentricity, the second group of limit states, deflection "

A modernized approach to project management using calendar and network planning is proposed, in particular, the issue of managing schedules in conditions of uncertainty is touched upon. The proposed approach allows us to take into account the factors influencing the timing of the project and, based on their consideration, take appropriate measures to ensure that we do not deviate from the specified construction deadlines. The proposed approach is based on the methods of Eisenhower matrices, which allow taking into account the degree of influence (vertically) and importance (horizontally) of each of the criteria, and the methods of subject-oriented management, which allow to exclude subjectivism in conditions of uncertainty by excluding manipulations of the external environment, and also include procedures for ranking and selecting factors influencing expert decision-making.

Keywords: project management, construction period, calendar and network schedule, risk, uncertainty conditions, subject-oriented management, project, group of factors, approach, solution

The Russian Federation is one of the leaders in the production and processing of oil, gas and petroleum products. Literally 100 years ago, mankind did not know how to properly, and most importantly carefully, store petroleum products. The construction of vertical steel tanks is different from the construction of ordinary (civil) buildings and structures. The specifics of the construction of reservoirs are discussed in this article.

Keywords: foundation, reservoir, oil, petroleum products, construction, frost heaving, permafrost, installation

The development of algorithms for solving problems of urban transport system management is an actual scientific and practical task. The absence of socio-economic facilities in the area of urban residents contributes to an increase in the of the cars use intensity. This situation contributes to traffic congestion. The article considers the methodic for assessing the infrastructure deficit for the transport districts of the city. The methodic provides for the development of dynamic maps, which are obtained on the basis of a survey of the city's population throughout the year. The information is generated and structured in the database, and if there is a request, it is processed and displayed as an infographic. For example, on the city map, the objects of interest are indicated by a symbol, pedestrian and transport accessibility to these objects for residents of a particular section of the city is marked in different colors.

Keywords: urban transport system, assessment methodology, questionnaire, data analysis, socio-economic object

The paper proposes a theoretical model of self-oscillators based on resonant tunneling diodes. Numerical modeling of the synchronization band of the oscillator was carried out on its basis. The effect of spreading resistance and resonator inductance on the synchronization band is analyzed. It is shown that at a low quality factor, as well as taking into account the nonlinearity of the capacitance and auto-bias, the frequency characteristics of the self-oscillator will be asymmetric and the instability regions of synchronous stationary oscillations will have a complex shape.

Keywords: theoretical model, numerical simulation, quality factor of an oscillatory system, synchronization bandwidth, capacitance nonlinearity, auto-bias, frequency characteristics, instability region, spreading resistance, resonator inductance

The article considers the solution of the scientific and practical problem of reducing the intensity of the use of personal passenger transport. To do this , the search for reserves of urban mobility is carried out . Cities with a population of no more than one million people are considered. It is assumed that the urban public transport system is represented only by bus transport. A practical method of searching for reserves of urban mobility is proposed, in which municipalities, business communities, science, production, and education are supposed to be involved. The proposed solutions are based on logistics methods. Examples of solutions: development of Internet aggregators for renting bicycles and personal mobility equipment, organization of storage facilities for personal mobility equipment, and more. Based on this method, you can create a module for an automated workplace of the transport division specialist of the city administration.

Keywords: urban transport system, urban mobility, smart mobility, mobility reserve, urban logistics

This article discusses a new method for adjusting the ground speed of a multicopter-type unmanned aerial vehicle and the initial, previously planned trajectory of its movement, taking into account horizontal stationary wind flows. The use of this technique for local rescheduling of the trajectories being worked out makes it possible to reduce the probability of loss of stability and controllability of such a device, as well as to reduce energy costs when driving in conditions of significant winds with an acceptable deviation from the initial trajectory. The developed algorithm is the basis for the synthesis of more accurate algorithms for local correction of the initial trajectory of motion in a complex field of wind speeds. The efficiency of the algorithm is confirmed by the physical correctness of the simulation results.

Keywords: unmanned aerial vehicle, wind load, stability and controllability of the vehicle, local adjustment of the planned trajectory, reduction of energy costs

The results of clinical trials are the main source of information in the implementation of medical activities in accordance with the principles of evidence-based medicine. At the moment, there are no information systems that would allow a doctor to select clinical studies within the framework of nosology that best match the profile of a particular patient, in order to further analyze their results and select therapy. The aim of the study was to improve the existing process of searching for clinical trials by using the prioritization method according to the inclusion criteria set by the doctor during the selection. To achieve this goal, the following tasks were implemented, namely, the process of selecting and searching for clinical trials by doctors was studied and the method of searching for clinical trials by doctors and the allocation of the necessary criteria was worked out. The team of authors proposed an algorithm for searching for clinical trials according to inclusion criteria, which in turn will significantly increase the effectiveness and reduce the time for searching and choosing therapy.

Keywords: clinical studies, criteria search algorithms, criteria search methods, including factors, search for the nearest class, services