Determining the deformability of the bearing structures of the coating, as an indicator of the use of the stiffness of the cross-section of the elements, is an urgent task, which is aimed at solving the current work. The purpose of the article is a comparative calculation of frame structures under the assumption of a different coating truss solution. The following types of load-bearing roof trusses should be considered: segment truss, trapezoidal truss, triangular truss. The calculation of frames using wood as load-bearing structures for the total effect of permanent and short-term loads causing maximum vertical deformations is given. In this paper, the coefficients of using the rigidity of truss structures using wood are determined and the dependence of the stiffness value on the type of outline of the coating truss is established. A comparison of the calculation results with the normative maximum permissible values allowed us to establish the most effective type of outline of the wooden roof truss.

Keywords: coating truss, modulus of elasticity, stiffness, upper belt, slant, lower belt, computational study, through-hole construction, segmental truss

The modern building material, slurry infiltrated fiber concrete - SIFCON, has not only high compressive and tensile strength, but also flexibility and ductility. These properties allow it to be used in nodes of building structures that perceive dynamic, shock, explosive loads, friction, as well as in the area of penetration of reinforced concrete slabs by columns. The paper describes experimental studies of the mechanical properties of samples from ordinary concrete and SIFCON. A comparison of the test results showed the superiority of SIFCON strength indicators over ordinary concrete by 2-4 times. For a wide range of specialists and students in the field of construction design, production of building materials.

Keywords: slurry infiltrated fiber concrete, steel fibers, cement mortar, flexibility, plasticity, energy absorption, water-cement ratio, superplasticizer, compressive strength, bending strength, splitting strength

The design of medical facilities requires careful coordination between different disciplines, especially when developing the section ""Technological Solutions"" (TS), which describes functional processes, equipment layout and compliance with sanitary standards. A common problem in this process is the lack of ready-made 3D families for specialized medical equipment in BIM systems such as Autodesk Revit. The purpose of this study is to develop an algorithm for creating equipment families based on a single image, which will eliminate time and resource constraints during manual modeling. To achieve this goal, the study examined modern design methods for TS and MEP sections, analyzed existing tools for creating families, and tested five neural network-based web applications capable of generating 3D models from 2D images. The proposed algorithm includes creating a 3D model based on images using artificial intelligence web tools, preprocessing the model in Autodesk 3ds Max, and importing the final geometry into a Revit family template. The algorithm was tested on a real example, an anaesthetic gas supply system, demonstrating the feasibility and effectiveness of the approach. Hyper 3D Rodin has been rated as the most effective tool for generation. The study concludes that integrating artificial intelligence into BIM workflows can significantly streamline the development of unique equipment families, reducing manual labor and improving project coordination.

Keywords: Revit family of equipment, medical equipment, neural network generation, 3D geometry of equipment, BIM, technological solutions

A transient non-linear coupled heat transfer problem with heat conductivity properties being dependent on moisture content has been studied for heterogeneous domain represented by a building exterior structure. Moisture content is considered as a variable parameter linked to material permeability and vapour transfer characteristics as well as amount of moist being condensed and evaporated. The solution to such problem has been obtained by using semi-analytical approach where the governing equations have been discretized by using finite element technique at the spatial domain, and analytically at temporal domain. Picard iteration method has been used for equation linearization. Based on a connection detail of three-layered exterior wall with floor slab, a sample problem has been solved. The results are compared with the results of similar but linear problem.

Keywords: non-linear transient problem, semi-analytical method, heat transfer, evaporation, condensation

The use of methods for strengthening soils with Portland cement makes it possible to increase the physical and mechanical properties of soils: strength, frost resistance, water permeability, etc. A technical understanding of the processes of structure formation in reinforced soils makes it possible to regulate the final properties and quality of the layers of highways. To describe the processes of structure formation, it is possible to use the theory of contact interactions and the theory of DLFO. The final properties of the reinforced soil are influenced by the following factors: mineralogy and specific surface area of the soil, water content, amount of cement, curing time and method of compaction.

Keywords: stabilized soils, structure formation of stabilized soils, stabilization with Portland cement, properties of stabilized soils

The aim of this study was to determine the effect of finely ground filler on the properties of slag-alkali binder based on blast furnace slag. An aqueous solution of sodium silicate and caustic soda (aqueous solution of NaOH) was used as a hardening activator with an alkali modulus (weight ratio SiO2/Na2O) equal to 1.0 and 0.5. The results showed that the introduction of Reftinskaya GRES fly ash into the binder instead of ground blast furnace granulated slag causes an increase in the initial setting time, but does not affect the final setting time. No cracking was detected during hardening in mixtures containing fly ash, provided that a complex based on sodium silicate and an aqueous solution of NaOH was used as a hardening activator. The introduction of alkali into the sodium silicate solution helps to reduce the silicate modulus (the mass ratio of SiO2/Na2O) and reduce the formation of shrinkage microcracks due to the formation of a homogeneous structure and the formation of fly ash and the formation of sodium hydroaluminosilicate (H-A-S-N).

Keywords: cement paste, ground granulated slag, fly ash, hardening activator, setting time, shrinkage, microcracks

The article shows calculation on the arrangement of the embankment and the design of reinforced concrete casings on metal staves for stairs. The dam boundaries are located on the territory of a residential complex with a large difference in height. The ground base is prosaic. Calculation of transfer of the soil from II type of drilling to I type by tamping method, which will ensure the strength and reliability of the body of the fill. Constructive actions to ensure resilience are described. The metal piles with forced connecting link and reinforced concrete coaxes in the form of a beam system have been designed.

Keywords: a mound, drilling ground, improvement, dense urban development, sediment, density of the ground, collapse prism, sliding radius, the method of ramming, sling

The use of ash and slag mixtures of thermal power plants in the structures of road coverings of highways makes it possible to significantly increase the volume of their reuse. One of the promising directions is their application in the compositions of stabilized soils. To assess the effectiveness of the use of these materials, such indicators as the cost of construction and the total thickness of the pavement structure are used. According to the results of the conducted research, it was found that the reduction in the total thickness of road clothing with layers of ash and slag mixtures of CHP compared with layers of traditional materials was up to 48%, the reduction in the cost of building road clothing structures using ash and slag mixtures is up to 21%.

Keywords: stabilized soils, ash and slag mixtures, road clothing, base of road clothing

The current problems of the construction industry are considered and an algorithm for the introduction of modern, flexible management methodologies to improve the efficiency of the management process in construction design organizations is proposed, as well as a variant of an integrated efficiency assessment system taking into account KPIs is being developed.

Keywords: construction, design organizations, KPIs, flexible management, Agile, Lean manufacturing, stakeholders, efficiency

The paper presents the methodology and results of experimental studies of concrete strength under uniaxial and biaxial compression under dynamic impact. The research results are presented in the form of illustrative tables and graphs. The effect of loading rate and the second principal stress on concrete strength is assessed. Ways for further research development are proposed. The studies have shown that under both static and dynamic loading, the type of stress state and the stress level σ2 significantly affect the strength of concrete. The most noticeable increase in strength occurs during the transition from uniaxial compression to biaxial, even with a small value of the second principal stress σ2. With an increase in the level of lateral compression from 0.2Rb to 0.6Rb, the strength of concrete also increases. Thus, the increase in strength at σ2 = 0.6Rb both under statics and dynamics is more than 40% compared to the strength in uniaxial tests with the corresponding loading rate. The type of stress state and the level of lateral compression affect the dynamic hardening coefficient, but to a lesser extent than the loading rate. A slight increase in k_(b,v) (σ_2) compared to kb,v was observed under biaxial compression with a lateral compression level of 0.4Rb and 0.6Rb.

Keywords: concrete, strength, strength criterion, experimental study, uniaxial compression, biaxial compression, dynamic loading, dynamic hardening coefficient

The article discusses the parametric dependencies of cylindrical rod shells in terms of their effect on the state of force and movement of nodes in the grid area. Critical condition factors are analyzed, taking into account the degree of cell filling and the magnitude of the discrepancy between the specified characteristics. The analysis of the formative parameters is carried out and the rational limits of their possible use are established. The factor of taking into account the size of the cell with the location of the rods inside the faces has been introduced. The basic ratios are obtained and the degree of sensitivity of the calculated models to changes in geometric shape is estimated. The limiting angle of the outlined circle has been found, beyond which the operation of the structure is impossible. The level of dangerous increase in the total parameter along the arc at the lowest possible height of the structure has been determined.

Keywords: cylindrical rod shells, mesh area, degree of cell filling, parametric dependencies, force state, stiffness

The article is dedicated to analyzing the changes in museum design in the context of the rapid integration of digital technologies. It examines the ways of integrating multimedia systems, virtual and augmented reality into the architectural structure of museum spaces. Based on the analysis of domestic and foreign examples, new approaches to exhibition formation are identified, built on principles of flexibility, interactivity, and immersiveness. The emphasis is placed on the changes in typological models of museums: from traditionally hierarchical to adaptive, transformable formats. Special attention is given to the evolving role of the architect, acting as a mediator between digital scenarios and spatial expression. As a result, the museum of the future is envisioned as a complex spatial-technological ecosystem, in which architecture becomes an active participant in communication with visitors through digital content and technological interfaces.

Keywords: typology, digitalization, museum, immersiveness, architecture, multimedia, museum of the future, design, digital exhibition, exhibition space

The article provides a review and systematisation of works devoted to the application of machine learning for solving problems of research, calculation and design of reinforced concrete structures. It considers the aspects, which are relevant today, related to calculation, design, as well as assessment of the technical condition of objects with the help of various approaches that implement machine learning schemes, including deep learning, ensemble algorithms. It is shown that nowadays in the world construction science this area is rapidly developing and improving. Thus machine learning algorithms solve problems of prediction of design parameters, problems of identification of these or those parameters, defects, damages on the basis of classification algorithms and others. The materials presented in the article will allow specialists to choose the subject area of research more precisely and determine the directions of adaptation and improvement of their own developments in the field of machine learning.

Keywords: machine learning, reinforced concrete structures, regression equations, identification, approximation, artificial intelligence

The article considers the causes of the formation of defects to be evaluated. The methods of obtaining information about the condition of metal corrugated pipes are presented. The main defects arising during the operation of metal corrugated pipes are shown. The most effective methods of assessing the condition of metal corrugated pipes have been determined.

Keywords: corrugated metal pipes, wear, durability, defects, factors, evaluation

We continue to study the stress-strain state of reinforced concrete bonded and unbonded prestressed beams. In this article, we consider the process of crack formation in such structures, relying on the results of testing experimental reinforced concrete samples of bonded and unbonded prestressed beams, as well as their three-dimensional models created in the Abaqus software complex. The results of calculating prototypes according to current standards are compared with experimental data and calculation of a finite element beam model in the Abaqus complex software complex, on the basis of which recommendations are proposed for calculating the crack resistance of prestressed reinforced concrete bonded and unbonded structures. In the course of the analysis, the following conclusions were made: 1) The real crack resistance exceeds the theoretical and obtained during testing of finite element models. When the effect of reinforcement is taken into account, the discrepancy is considerably reduced, so it should be included in the calculation for a more accurate determination of crack resistance. 2. Unbonded prestressed structures have lower crack resistance compared to classical bonded reinforcement.

Keywords: reinforced concrete beams,prestressed structures, bond, rainforcement, crack resistance

Technical solutions aimed at preventing and eliminating the consequences of emergency situations in tunnel construction practice (in terms of laying utility lines or subways) are defined. Technical solutions are given taking into account their implementation in the conditions of structures under construction and in operation, characterized by a repeatable and predictable nature of occurrence.

Keywords: building structures, technology, repair work, underground utilities, tunnel, metro construction

The features of the calculation of nodal joints of frame buildings made of cold-formed steel profiles are considered. The connection of elements of frame buildings made of cold-formed steel profiles for the perception of acting forces is made on bolts using low-carbon steel shapes, the profiles themselves are made of thin-sheet galvanized rolled products. But there are no requirements for the thickness of the shapes and specific thickness values depending on the applied forces in the regulatory documentation, since these compounds are poorly studied in Russia. The calculation of frame buildings made of cold-bent steel profiles and the analysis of nodes with bolted connections was carried out and a method for determining the number of bolts in nodes in two design cases depending on the thickness of the shape was proposed, the need to introduce these requirements into the regulatory documentation for thin-walled structures was shown.

Keywords: cold-formed profile, hot-dip zinc-coated steel sheet, frame building, node, single-bolt connection, shape, crumple, truss, thin-walled structures

The article considers the prospects for the development of modular construction of buildings and structures in the North Caucasus, analyzes the stages of formation and development of this direction in the light of modern trends. Modular technology in construction is a modern method that involves assembling buildings from prefabricated modules. This approach can significantly reduce the time of construction of buildings, improve their quality and reduce costs. In the conditions of the Stavropol Territory, where there is an increase in the population and the need for housing, such technologies can play a key role in solving the problem of providing citizens with comfortable and affordable housing. This article considers the possibilities of using modular technology in house building. The advantages of this technology are considered in terms of quality, savings, time and environmental friendliness, as well as the flexibility of designs and safety both in the production process and during installation at the construction site. The disadvantages of modular construction are also mentioned, such as the complexity of transporting modules, the need for coordination between production and construction, as well as the high cost of production and standardization. The North Caucasus has unique natural and climatic conditions, which opens up opportunities for the use of modular technologies. Modular housing construction is a fairly efficient construction technology that leads to a reduction in waste and ensures greater precision in the manufacture of components.

Keywords: modular technology in construction, construction production, construction technologies, architecture, environment, module, frame buildings, ergonomics, volumetric modular design, modular construction

The article presents a study of the hydrophysical properties of modified cement concretes, namely frost resistance and water resistance. The compositions of modified concretes for research are determined. It is established that the use of mineral fertilizer production waste in combination with the superplasticizer "Osnovit Safescreen SPP1" allows to increase the frost resistance, water resistance and strength of concrete composites.

Keywords: heavy concrete, hydrophysical properties, frost resistance, water resistance, strength, porosity, organomineral modifier, waste, plasticizer

The study is devoted to improving the methodology of calculation of structures for the impact of explosive loads, including aerial shock waves in UAV attacks. Modern modeling methods are analyzed, a calculation algorithm using non-linear dynamic approaches is proposed. It is shown that the use of spherical discrete elements allows a more accurate assessment of debris destruction and formation. The calculations presented confirm the effectiveness of the proposed approach.

Keywords: Explosive loads, air shock wave, unmanned aerial vehicles, dynamic calculation, destruction of structures, simulation of explosive effects, application of spherical discrete elements, calculation algorithm, formation of debris, non-linear methods

Bamboo as a building material has its own characteristics. It works well in stretching and bending. Bamboo has only longitudinal fibers that are prone to splitting, however these fibers are twisted in a knot. This phenomenon reduces the tensile strength. The mechanical properties of bamboo describe its reaction to physical influences. In general, bamboo has a high tensile strength parallel to the fibers. This article describes the mechanical properties of a bamboo rod depending on the loads, as well as modulus of elasticity of various types of bamboo. This article summarizes the experience of building buildings made of bamboo elements.

Keywords: bamboo, fibers, knot, joint, strength, construction, deformation, stretching, mechanical properties, anisotropic material

Finding ways to improve the efficiency of the production process at precast concrete plants is a relevant area in production management. It is necessary to take into account the specifics of the entire production process. Identifying opportunities to improve the production process management system is critical for any organization seeking to increase efficiency, reduce costs, and improve overall productivity. Production process management involves taking into account many variables, such as labor, equipment, raw materials, workflow, and more. Production management is aimed at optimizing production and finding a balance between the quality and productivity of manufactured goods, as well as the time and resources spent on their production. When studying ways to improve the production process, managers focus on two key parameters: productivity and product cost. When setting goals to reduce costs and increase productivity, managers must take into account these closely interrelated elements. But despite the obvious connection between productivity and cost, attempts to improve these parameters are often made separately. The purpose of the article is to identify approaches to optimizing the production process management system at an enterprise. The study is practically significant due to the fact that the development of approaches to optimization of the production process management system at the enterprise will help to use these approaches in the production process management system.

Keywords: enterprise, production process, management system, approaches, optimization

A comparative analysis of the lighting conditions of school premises was carried out based on design solutions for lighting devices from three Russian lamp manufacturers. All projects were carried out using lighting devices based on recommendations to manufacturers to use their range of lamps to illuminate various school premises. The design was carried out using the DIALux program. Each of the three manufacturers is widely known to specialists and has established itself as a reliable manufacturer of domestic lighting products, ready to offer a full range of lamps for various school premises. A technical and economic comparison of the total present costs for all lighting installations (using the example of one entire school) made it possible to conduct a comparative analysis and determine the most profitable options. An analysis of the current state of the Russian market of lighting devices recommended by manufacturers for classroom lighting has been carried out, their characteristics have been reviewed, and their compliance with current energy efficiency requirements has been assessed. Conclusions and forecasts have been made for the further development of lighting equipment with LEDs for lighting classrooms, based on the need to constantly improve the modern range of lighting devices in terms of their energy efficiency and competitiveness.

Keywords: technical and economic comparison, levelized cost method, comparative analysis, school lighting, lighting device, lighting modeling, energy efficiency

In this article, the authors consider the main aspects of maintaining the temperature and relative humidity of the premises of library collections and archive repositories using specialized engineering equipment. The preservation and preservation of material assets is designated as one of the priority tasks of preserving the cultural heritage of Russia. Conservation includes all types of activities and engineering support to guarantee the physical safety of any objects intended for long-term storage, such as library and museum. Currently, both the national program for the preservation of cultural values and the strategy for the development of librarianship have been adopted, including engineering methods for maintaining microclimate parameters for storage facilities and archives of various types: library, museum and federal purposes. Previously, the authors studied the reports provided on the preservation of library collections in Russia and abroad. It has been revealed that in a significant number of cases, the conditions for the preservation of both paper and other funds intended for storage and use as necessary to work with them are not provided. The authors conducted a study and analyzed changes in microclimate parameters when using central air conditioners of various configurations serving two separate sections of one library storage, which is a single-tier room type. The disadvantages of using a simplified basic modification of the central air conditioner based on the results of temperature and relative humidity control in each of the rooms, performed daily from January to June 2022, were confirmed. Variants of changing the configuration of engineering equipment with insufficient functionality with a limited area of the ventilation chamber are proposed.

Keywords: library, engineering equipment, central air conditioning, preservation of funds, conservation, microclimate, storage

The article discusses the results of the analysis of the stress-strain state of the junction of the column and the beam of a monolithic reinforced concrete frame - in particular, the cornice nodes of the outer columns, which have an L-shape. In these nodes, part or all of the tensile (upper) reinforcement of the beam, bending along a certain radius R, passes into the column. The subject of the study is the stress state of concrete in the frame node, as well as the features of the operation of the curvilinear section of the tensile reinforcement. The study of the features of the concrete operation was carried out by setting up a computational experiment. Modeling was performed in the Lira-SAPR software package. The characteristics of the model (finite element scheme) and the main results of the calculation are given - the distribution and numerical values ​​of stresses. To assess the actual work of the tensile reinforcement of the node, an analysis was made of the influence of the loading history of the reinforcement bar - its plastic bending to give the required outline. It was established that the stress state of concrete of a bisecting section differs fundamentally from the stress-strain state of concrete in normal cross-sections of a beam and a column. Taking into account the loading history of the reinforcing bar (preliminary inelastic bending) allowed us to conclude that, with the same tensile force, the deformations of a pre-bent bar exceed the deformations of a rectilinear bar. Obviously, this circumstance leads to an increase in the crack opening width.

Keywords: ramny node, reinforced concrete, reinforcement, stresses, deformations, bisector section, normal section, plastic bending, bending radius, loading history, finite element, Lira-SAPR