From the standpoint of controlling the behavior of steel floor beams during the operation of a structure, the use of elastically compliant joints in the beam support nodes at the construction stage is considered. Elastic joints are an intermediate link between an ideal hinge and an absolutely rigid connection of the beam ends to the main load-bearing structures and can provide an effective structural solution for connecting elements of any materials with a real reduction in their stress-strain state. The use of resilient joints can be an effective solution for running roofs and ceilings, in load-bearing structures of steel frames, multi-span beam structures. This approach, in principle, is also applicable to beam structures of a through section.

Keywords: system behavior control, steel structure nodes, elastic joints, joint stiffness, analytical solution, finite element method, high-strength fiber

The article discusses the importance of using energy-saving and energy-efficient technologies for the purpose of sustainable development of the country's territory. Examples of the introduction of energy-efficient residential complexes in Europe, as well as the experience of using these technologies in Russia are presented.

Keywords: energy efficiency, energy-saving technologies, construction, world experience, energy saving

The article is devoted to the architectural and artistic analysis of the vernacular development of Rostov-on-Don in the second half of the 19th century, to identifying the ways of its formation, determining the regional conditionality and systematization of vernacular elements in residential buildings. The scientific novelty of the article is due to the fact that a detailed study of the vernacular buildings of Rostov-on-Don in the second half of the 19th century is being undertaken for the first time, the identification of vernacular features in an ordinary historical building allows us to consider it as an integral component of the regional identity of the architectural heritage that deserves to be preserved.

Keywords: architecture of Rostov-on-Don in the second half of the 19th century, vernacular buildings, Cossack hut, neo-Renaissance, neo-baroque, neo-rococo

The recycling of industrial waste has always been relevant. In the modern world with the development of technology and the construction industry, it is necessary to find new opportunities for the disposal of industrial waste. One of the disposal options is to obtain synthetic anhydrite. Features of production and the finished product of processing make it difficult to use a binder for housing and civil construction. The study of the process of hardening of anhydrite binder and the properties of the resulting stone allows it to be used in different technologies for the manufacture of various building structures based on this binder.

Keywords: gypsum, anhydrite, synthetic anhydrite, industrial waste.

Natural disasters can cause serious damage to cities and entire regions, which makes it important to improve the efficiency of planning repair and construction work when restoring built-up areas. The article discusses the organizational and managerial aspects of the restoration of territories affected by natural disasters, which is the basis for effective planning and implementation of projects for the reconstruction and restoration of settlements.

Keywords: natural disasters, emergency situation, urban area, advanced planning, infrastructure

3D printing (3DP) is considered an innovation that promotes automation in civil engineering and offers advantages in design, sustainability and efficiency. With its potential to automate, eliminate formwork, reduce construction waste and improve geometric accuracy, 3DP has promising applications in the building construction and civil engineering. 3DP is an effort to put digital manufacturing into practice, enabling a direct transition from building design / modeling (BIM) to 3DP. This article provides various aspects of application in construction, materials and their compositions, as well as examples of the use of 3DP: buildings, structures, polymer sleepers, etc.

Keywords: 3D technologies in civil engineering and construction, materials

According to available literary and graphic sources, the components of urban space, its structural units and their methods of formation are analyzed. The possibility of forming public spaces inside buildings and structures by methods of forming urban spaces is revealed.

Keywords: space, microspace, mesospatial, macrospace, methods of formation, urban structure, public space, levels of spatial organization, public structure, formation of a public complex

This paper studies the effect of recycled fillers on the properties of waterproofing mastics made for the tough climatic conditions in Siberia. Currently mineral powders from carbonate rocks are used for mastics production. However, these rocks are not located in all regions of Russia Federation and the production of mineral filler powders from these rocks is often associated with great production costs. The aim of this study is to develop bitumen mastics with reduced overall production costs that are able to comply with GOST standards. The experiment was conducted to provide insight on the recycled fillers (RF) in reliability, durability, climatic, freezing resistance of bitumen mastics. The method we applied involved in classic (with limestone filler) bituminous mastics comparison with recycled mineral fillers the tailings of neutralization (Norilsk) as well as the waste of barite production (Chernogorsk). A laboratory test method for bituminous mastics was used so what we could ascertain their properties like softening temperature, penetration value, low-temperature extensibility, Fraas breaking point, Modulus of elasticity. Results indicate that the mastics freezing resistance have increased with combined use of the recycled mineral fillers and thermoelastoplastic elastomer (TPE) DST-30. They recognize the possibility of waste utilization as alternative fillers in bitumen mastics that could lead to cost reduction effect. Developed mastic compositions recommended for use in commercial construction which contribute to the goals of waste processing and recycling in the Krasnoyarsk Territory.

Keywords: stone-mastic asphalt concrete, industrial waste, nepheline sludge, mineral powder, stabilizing additive, cord fiber waste, bitumen, road surfaces

The article deals with the need for reconstruction of rehabilitation institutions. The relevance of this issue today is difficult to overestimate, since the vast majority of medical institutions built in the Soviet era are still working, but over the period of operation they have accumulated significant moral and physical deterioration. That is why the issue of their reconstruction is acute, the implementation of which can significantly increase the comfort of incoming patients and ensure the provision of medical care at a high level.

Keywords: reconstruction, construction, operation, rehabilitation institutions

The article outlines the history of the development and formation of the landscape gardening art of Central Asia, which was based on the centuries-old tradition of landscape architecture, and shows that the landscapes of cities did not remain stable over time and depended on water supply and ways of distributing watercourses in the territory. The utilitarian purpose of the open structure of water conduits in the past determined the planning structure of the city. The improvement of the urban environment, where gardens, parks, squares, seedlings of green spaces were formed, boulevards with wide straight paved streets were also created. Such a similarity came from European cities, this urban planning tactic in the conditions of rapid, close construction began to violate the medieval appearance of the city of Khujand, Samarkand, Ura-Tyube, etc.

Keywords: improvement, landscape, Central Asia, urban environment, boulevard, urban planning, architecture, gardening art, architecture

This article attempts to consider some of the features of the calculation and operation of light trusses from rolling corners. Is given brief information about the history of the use of trusses from single corners, their advantages and some disadvantages, as well as the prospects for the use of structures of this type in modern construction practice. Based on the analysis of the design documentation for a number of industrial facilities built over the past two decades in the Khabarovsk Territory, are analyzed the most common mistakes that designers make when developing roof structures using trusses from single rolling angles.

Keywords: farm from single rolling corners; corrosion resistance of elements; eccentricity of the acting effort; loading nodal moment; the value of the coefficient of working conditions; farm support node; additional forces in compressed rods

The sedimentation analysis method is based on the measurement of the deposition rate of suspended solids depending on their equivalent diameter. The use of sedimentation for disperse systems is limited by their size, as microscopic dust particles have low deposition rates and are difficult to analyze. Therefore, for finely dispersed systems, the authors propose a method of sedimentation analysis using portable cameras that record the deposition process and break it down into frames. The images obtained frame by frame are translated with the help of a graphic editor into binary (black and white) format, which is able to process the software. The experimental data obtained are presented in the form of tables and distribution functions.

Keywords: sedimentation, dispersion, dust, binary photography, equivalent diameter, cement dust, distribution function

Studies of building control issues are one of the most topical for industries and human life. The construction industry is one of those. The problem of safe and high-quality unique buildings is closely related to quality construction control.The article discusses the main stages of the documents regulating construction control in the implementation of unique objects, their systematization is given. The schemes of interaction of the main construction participants at the stage of construction and installation works with the obligatory involvement of experts in scientific and technical support of construction for the purpose of further study are presented.

Keywords: construction control, unique buildings, scientific and technical support of construction, construction quality, Camunda BPM

At various stages of the life cycle - during manufacture, transportation, installation and operation, defects and damages may occur that affect the stress-strain state of structures. Some examples of survey the technical conditions of load-bearing structures of enterprises in the city of Ivanovo are given in the article. Defects and damages in operated bending structures are revealed. The results of experimental studies of reinforced concrete beams with initial cracks are presented. The tables show: the beam loading scheme, defect parameters, the location of initial cracks, the main characteristics of materials, as well as experimental data in the form of the relative moment Mult / Mtest, where Mult is the breaking moment of a beam with initial cracks, Mtest is the breaking moment of a similar beam without defects. The degree of influence of defects on the bearing capacity of beams is determined. Empirical coefficients are calculated that take into account the type and parameters of cracks, the cross-section reinforcement coefficient and concrete strength of the beams. A formula for determining stresses in concrete compression zones for beams with cracks is derived based on the theory of destruction mechanics and using experimental coefficients. A method for calculating of reinforced concrete bending structures bearing capacity with defects and damages is proposed. An analysis of experimental and theoretical studies confirming the correctness of this technique is made.

Keywords: reinforced concrete bending elements, beams with cracks, load-bearing capacity, calculation method

This work highlights the architectural and urban planning structure development of Rostov-on-Don in the first half of the twentieth century. The article reflects the main problems identified by architects in the 1920s and 1930s and attempts to solve them in the pre-war and post-war periods. The stages and conditions of restoration of the destruction of the city caused by two occupations during the Great Patriotic War are presented. The restoration concept of 15 RSFSR cities is described. The principles of restoration and their implementation on the example of Rostov-on-Don are considered. The evolution of the city’s architectural appearance is presented. The Triumph of Victory over the Nazi occupiers is shown.

Keywords: urban planning, restoration, architectural appearance, Rostov-on-Don, history of architecture, reconstruction, planning structure, general plan, urban landscaping structure, post-war restoration, preservation of architectural heritage

Reconstruction of industrial enterprises is a complex, time-consuming and expensive process. When implementing it, a number of significant problems arise that must be taken into account at the design stage. This will allow us to find approaches to solving the problems of reconstruction of industrial production carried out under various conditions and significantly reduce the costs of construction work. Reconstruction also has three main directions, covering certain tasks and differing in the scale of reconstruction activities. One of these areas is revitalization. When there is a need to solve problems focused on the socio-cultural life of the population on the territory of the existing urban development, revitalization becomes the optimal and modern way of solving. The result of the reconstruction should be an increase in production capacity and profitability of enterprises, a reduction in the negative impact on the environment, as well as an increase in social comfort in residential areas of cities.

Keywords: reconstruction, technical support, re-profiling, revitalization, production area, production capacity, radical reconstruction

This article discusses the features of the pitched roof for typical residential buildings. The design of gable space-roof structures is carried out within the framework of the application of the constructive system of coverage of panel residential buildings with longitudinal load-bearing walls. The formation of the structural form of the cover is solved by the sequential development of the modular system of blocks. The modular system is based on the regular block, which consists of a double-slope deck of bent sheet profiles, fused by folded joints, and a supporting spatial-rod load-bearing system. The design and calculation provisions for the modular unit are presented, taking into account the peculiarities of the layout of the structural form of the cover. The main findings on the use of double-slope roofs are given. The conclusion gives the prospects for the development of the double-slope roofs with the deck of the bent sheet thin-walled profiles. The use of lightweight structure of the roof allows to expand the possibilities of designing the reconstruction of residential buildings of typical construction with a shallow sloping roof without a significant increase in the load on the foundation. The structural solution makes it possible to implement at the construction site an enlarged assembly of the gable roofing, minimizing the use of multiple hand labor and increasing the safety of construction work.

Keywords: configuration of the gable roof, modular block, bent-sheet thin-walled profile, folding seam assembly, spatial rod system

The article provides an overview of construction technologies for the construction of multi-storey residential buildings, taking into account the speed of construction and the quality of structures. A summary table of various types of construction is presented, advantages and disadvantages are identified.

Keywords: construction production, optimization, constructive solution, method of construction of buildings, block, panel, large-block, monolithic frame, monolithic, modular, comparison, analysis, advantages, disadvantages

The article provides a solution to the problem of optimizing air ducts with a rectangular cross-section for ventilation and air conditioning systems. Based on the use of the methodology for optimizing air ducts according to the above costs, the optimal proportions of the sides of the rectangular cross-section of the duct are determined, depending on the amount of material costs for the duct device and the cost indicators of its operation. The obtained optimal aspect ratios of the cross sections of the ducts are universal and do not depend on the location of the duct relative to the system fan. These conditions allow, at the design stage of the ventilation system, to assess the degree of optimality of the decisions made on the choice of the dimensions of the cross-sections of the ducts and, if necessary, to make appropriate changes to the design solutions of the ventilation system. The obtained optimality conditions allow them to be included in the calculation programs of the air.

Keywords: fan, air heater, ventilation system, heating and ventilation system, energy, power, energy efficiency, energy conversion, mechanical power flow, thermodynamic system

in the article, based on an analysis of some examples of interactive architecture, possible trends in its development are identified. As an example, modern media objects are considered, like Times Square in New York; Iluma Complex in Singapore, Kunsthouse in Graz, Austria, Harpa Concert Hall in Reykjavik; innovation center "Hypercube" (HyperCube) in Skolkovo; Rostov-Arena Stadium In Rostov-on-Don. Described are distinctive features of investigated objects, as well as its formation on the basis of computer and multimedia technologies. The influence on the appearance of the urban environment and the social activities and communication between people that take place in it is investigated.

Keywords: interactivity, media architecture, information technology, dynamic, trends, development, perspectives, urban environment

The article provides an analysis of the possibility of using carbon fiber-based external reinforcement systems to strengthen the load-bearing structures of beam arches along steel beams. The main conclusions based on the results of previously conducted laboratory studies on full-scale samples, as well as the results of the work performed on reference objects are presented. As a result, general conclusions have been drawn regarding the calculation and design, as well as recommendations for further research on the calculation and design of these systems.

Keywords: vaults, prussian vaults, monier arch, external reinforcement, carbon fiber, reinforcement, restoration

When developing the final qualifying paper the problem of choosing the optimal structural concept for bearing and enclosing structures. To solve it, normative technical and economic indicators, variant comparison (trial design) and other methods can be used. The objective of the present study, which is carried out as part of the final qualifying paper, is to search for and develop an algorithm that is understandable for practical use for choosing an effective (in terms of specific consumption) structural concept for a steel truss.

Keywords: optimization, specific consumption, cost value, steel truss, steel structure design, STARK ES, analysis of trusses, optimal structural concept, changing the section type, selection of an effective structural concept

The article presents the issues of the introduction of active energy complexes into the Russian energy system as an element of distributed generation for commercial and industrial consumers. In 2020, a pilot project was launched in Russia to create micro–energy systems for commercial and industrial consumers - active energy complexes. This form makes it possible to increase the efficiency of the Unified Energy System of Russia due to the possibility of optimizing the external network infrastructure and will allow businesses to reduce the cost of energy supply. The prerequisites for the development and implementation of the concept of active energy complexes in Russia were the increase in the cost of energy supply to enterprises, as well as the development of distributed generation and digital technologies.

Keywords: digital transformation of the electric power industry, active energy complexes, small generation, micro-energy system, gas-piston power plant

This study presents two different designs of the ankle-foot orthosis (AFO): the adjustable hinged and the modified static, polypropylene and steel models. The ankle-foot orthosis test is performed in a patient with an ankle fracture as a result of a sports injury. Analysis of AFO models for calculating von Mises stress and fatigue safety margin is demonstrated. Interference, force, and pressure between the AFO contact area and the foot were measured for all subjects using the F-Socket probe, which was used to measure force applied to the ankle joint, for numerical analysis using ANSYS V.R15. Where we can see that the ankle joint has the greatest concentration of load. The stresses and margin of safety in the AFO adjustable joint are 418.9 MPa and 2.4, respectively. Whereas in the modified static AFO the stress and safety margin reached 192.8 MPa and 0.447, respectively.

Keywords: force, pressure, ankle joint, mobile joint, modified statics, ankle-foot orthosis