Introduction. As an example, an object of cultural heritage of federal significance is considered, which is one of the main objects forming the general appearance of the territory of the VDNH. The main purpose of the study is to analyze the results of historical, architectural and field studies of the facility, as well as to analyze data on the condition of materials and structures of the building obtained during restoration work on the facility under the supervision of the author. Description of the differences between design solutions and solutions implemented during construction.

Materials and methods. The study was conducted on the basis of work with archival information and the selection of analogues, as well as on the basis of research directly at the cultural heritage site as part of the author’s team of the restoration workshop.

Results. Conducting field studies during the production of works allowed us to introduce clarifying architectural and constructive solutions into the project. This made it possible to supplement the restoration and adaptation project, to take into account additional volumes of materials when drawing up estimates

Conclusions. When carrying out restoration work, it is extremely important to conduct scientific guidance, as well as for designers to conduct active authorial supervision, as it is not possible to perform a 100 % inspection of building structures at the stage of building inspection. The presence of hidden defects in cultural heritage sites is a constant phenomenon. The following defects were identified on the object given as an example, which affected the decision-making process.

Introduction. The tactics of accelerating the pace of civilizational development of the Republic of Côte d’Ivoire through the implementation of a continuing education programme localized in integrated architectural and urban complexes of existing universities are considered.

Materials and methods. The conceptual basis of the paper is a functional and spatial synthesis of a three — phase learning system: primary general education, vocational secondary level and higher level — materialized by a complex architectural solution. Such an association is planned to be held in Ivory Coast for the first time. Therefore, the study is focused on the search and analysis of the methodology of the organization of continuing education, which has developed in other countries, and the projection of their experience on the educational system of Côte d’Ivoire.

Results. The socio-economic and ethnic circumstances, both historical and modern, are summarized. Based on the materials provided by the Ministry of Education of the Republic, a preliminary programme has been prepared for the organization of a network of educational centres for continuing education (CCE), which is now recognized as the leading one in the education and upbringing system at all age levels of students in many countries. The programme takes into account the main parameters and ethnic specifics of the contingent of trainees, the distribution of centres in the country, based on the specific needs of general and vocational education. For the first time, variants of architectural and compositional solutions of the centres are proposed, including both the main areas of study and housing, as well as infrastructure facilities that take into account the localization of complexes in the structure of cities.

Conclusions. The fundamental differences between the CCE and the planning structure and architectural solutions of existing university campuses are revealed, but the similarity of some structural elements that allow these objects to be mutually adapted is not excluded. The success of the implementation of the programme for the creation of continuing education centres in Côte d’Ivoire will make it possible to transfer the experience into the practice of neighbouring countries experiencing similar problems.

Introduction. Currently, according to the new territorial development strategy, the development of the Russian Arctic in general and the development and optimization of the structure of the ports of the Northern Sea Route (NSR) in particular is one of the most important national priorities. The growing demand for infrastructure equipment for the ports of the Arctic Ocean region, the growing interest in offshore deposits in the Arctic Council countries and the need for socio-economic development of the surrounding areas require a comprehensive approach, in particular the development and implementation of a three-stage long-term development model, which includes a master plan for a settlement, an architectural and urban planning group and a standard architectural model. The objective of the study is to identify the characteristics and problems of the design of the architectural structure of the seaports of the North Sea coast in a new geopolitical phase, the development of Arctic architectural clusters based on the logistics core (seaport) and the construction of typical architectural models within the cluster based on the prevailing typology.

Materials and methods. The study is based on the application of a systematic and comprehensive approach to the design of architectural objects of seaports within the framework of clusters, an analytical analysis of documents on the spatial development of the Russian Federation for the period up to 2030 with a forecast up to 2036, an SWOT analysis of the potential of the proposed architectural and urban planning models, and analog modeling.

Results. Regional features and problems of forming the architectural structure of NSR seaports at a new historical stage are identified. Three architectural and urban planning models of Arctic clusters based on the port of the Northern Sea Route are developed. Typical architectural models within the cluster are proposed, based on the prevailing typology. A SWOT analysis of the use of the cluster approach is conducted. Weaknesses and strengths, opportunities and threats are determined.

Conclusions. The need to supplement the new Strategy for the development of the Arctic zone of the Russian Federation until 2035 is justified by the application of a three-stage long-term urban development model, which includes: a master plan for a settlement, an architectural and urban development cluster, and a standard architectural model based on the prevailing typology.

Introduction. It is necessary to ensure that by 2030 the Russian Federation is among the top 25 leading countries in the world in terms of robotization density. The solution of this most important task should contribute to increasing the competitiveness of the Russian industry in the global market and accelerating the technological development of the country. Robotization has been identified as one of the directions of development of wooden house building. The condition for the introduction of automation and robotization is the creation of a continuous digital environment, starting from design, manufacturing, operation and disposal of building structures, covering all stages of the life cycle of construction products.

Materials and methods. There is an active growth of scientific papers devoted to robotics in the construction sphere.  In terms of the number of published papers Russia ranks 6th out of the total number of 61 countries considered. The efficiency of construction robotization is assessed from the point of view of economic efficiency of construction as a long-term investment process. The introduction of robotization depends to a large extent on the type of materials and production operations used. Currently, specimens of a new generation of domestic automated and robotized construction and assembly equipment are being developed and introduced into construction. Construction using wooden structures is one of the most promising areas for robotization.

Results. The experience of robot production of wooden arch coverings made of standardized calibrated solid timber bars of Japanese cypress wood with the use of single-type joints is considered. On the basis of production indicators of the operating enterprise LPC “Almas” LLC in Yakutsk the estimation of the reduction in the cost price of wooden panel constructions by 17.48 % was made when automating their production. An expert assessment of labour cost reduction in construction and installation works of large-panel buildings, as a correct analogue of a multi-storey building made of wooden CLT-panels, by 25 % in machine-shifts and man-days was carried out.

Conclusions. A prerequisite for the implementation of robotization is the creation of BIM of a high level of detail. The introduction of automation and robotization in construction with wooden structures has an effect on the stages of the factory production process and construction and assembly work.

Introduction. The studies of the processes of deformation of shells are mainly carried out using computational algorithms that implement the application of various numerical methods. These algorithms must ensure obtaining accurate results and high speed of calculations, and must also be resistant to changes in input parameters (geometry, material). The purpose of this work is to develop a computational algorithm for calculating the stress-strain state (SSS) and buckling of shells, based on the application of the Ritz method and the Newton method, ensuring high productivity and stability of the solution.

Materials and methods. The deformation of shell structures is described by a geometrically nonlinear mathematical model of the Timoshenko – Reissner type, which considers transverse shears and orthotropy of the material. The mathematical model is written as a functional of the total potential energy of deformation of the shell. The study of the stress-strain state and buckling of the structure is reduced to finding the minimum of the functional. Using the Ritz method, this problem is reduced to solving a system of nonlinear algebraic equations. The solution of the resulting system is carried out using the Newton method. A distinctive feature of this algorithm is the use of an adaptive step by load when solving a system of nonlinear algebraic equations.

Results. Calculations of structures were performed: shallow shells of double curvature and cylindrical panels made of isotropic and orthotropic materials. The obtained values of critical loads have good agreement with the results of other authors: for shallow shells of double curvature, the maximum discrepancy of results was 8,05 %, and for cylindrical panels 7,29 %.

Conclusions. A computational algorithm for calculating the stress-strain state and buckling of shells that is stable to changes in geometry and material of the structure has been developed. High performance of the algorithm is ensured by using an adaptive step by load when solving a system of nonlinear algebraic equations. The possibility of using this algorithm when studying shallow shells of double curvature and cylindrical panels has been substantiated.

Introduction. At slab-column joints, where significant force is concentrated on a relatively small area of the support, punching shear failure of the slab may occur. This type of failure is accompanied by formation of the spatial failure surface called punching cone. The main factors influencing punching shear capacity are: energetic size effect, percentage of longitudinal reinforcement in the tensile zone of the slab, span to depth ratio, column perimeter to depth ratio. Lack of consideration for these factors in a calculation method may result in low accuracy. The purpose of this work is to develop a calculation method which takes into account the main factors affecting the punching shear capacity of the slab.

Materials and methods. The paper presents a comparison of the punching shear strength obtained in laboratory tests with domestic (CP 63.13330) and foreign (Eurocode 2, ACI 318-11, Model Code 2010) building codes. It is important to develop a more accurate method for calculation of punching shear strength of a slab. Coefficients of the method can be obtained by the least squares regression analysis using Levenberg – Marquardt algorithm based on the experimental data.

Results. As a result of the regression analysis, a calculation method for punching was obtained. The comparison of the punching shear strength obtained in laboratory tests with the described method is given.

Conclusions. The comparison showed that the obtained method has a higher compliance with the experimental data than the methods presented in a number of building codes. The developed method can be used to assess the punching shear strength of slabs and foundation with and without transverse reinforcement.

Introduction. Modern studies on the quantitative assessment of the reliability of structures during earthquakes generally do not consider wave effects, the spatial heterogeneity of soil foundations, and the reverse impact of the structure on ground motion. The purpose of this work is to evaluate the reliability of the “structure – multilayer foundation” system, considering factors such as stiffness of the structure, the thickness and density of soil layers, the propagation speed of the transverse seismic wave, and the dominant frequency of seismic action. The reliability measure of the system is taken as the probability of the dynamic coefficient exceeding a specified value.

Materials and methods. A computational model of a horizontally layered medium is used. The structure is considered an element of the layered system with equivalent rigidity characteristics. Seismic loading in the form of a vertically propagating shear wave is modelled as a stationary random process. The output characteristics of the system include the spectral density of acceleration, the amplitude — frequency response, and the dynamic coefficient at any level of each layer and the structure. Based on a series of calculations, the dynamic coefficient is formulated as a nonlinear function of six random arguments. The function is linearized using the experimental design method, and the reliability function is constructed.

Results. Analytical dependencies of the dynamic coefficient function were obtained for two types of foundations with increased and decreased stiffness values of layers, with different orders of their alternation. An assessment of the adequacy of the adopted linear model was conducted. The probabilities of exceeding the normative value of the dynamic coefficient were determined for buildings of varying rigidity, considering the influence of the thickness of the soil foundation layers.

Conclusions. The dynamic coefficient adopted in the standards, which does not exceed 2.5 for all soil categories, cannot ensure the required reliability level of earthquake — resistant buildings and should be determined based on calculations that account for the rigidity of the structure and the characteristics of the multilayer foundation.

Introduction. An overview of modern solutions in the field of recycling of secondary raw materials for the production of small-piece concrete products used in road construction is presented. The current problems of waste disposal associated with human activity and the possibility of their reuse to reduce the environmental burden and save resources are considered. Various types of secondary raw materials suitable for use in concrete mixes, such as construction and demolition waste, rubber, brick chips, etc., are analyzed.

Materials and methods. Based on the analysis, generalization and systematization of information obtained from open domestic and foreign sources, the practical experience of using various secondary raw materials for the needs of the transport and road complex as a filler or additives for small-piece concrete products is considered.

Results. The paper systematizes data on the properties of concretes using recycled materials, examines the effect of various types and amounts of additives on strength, frost resistance, water resistance and other characteristics of small-piece concrete products. The existing standards and regulatory documents regulating the use of recycled materials in road construction are analyzed.

Conclusions. The review demonstrates the significant potential of using recycled materials in the production of small-piece concrete products for road construction. The involvement of secondary raw materials in the production technology of small-piece products makes it possible to reduce the cost of production, reduce the amount of waste sent to burial and contributes to the conservation of primary natural resources. However, further research and development of optimal technological solutions is needed to ensure high quality and reliability of products using recycled materials, taking into account the specifics of climatic conditions and requirements for durability of road structures.

Introduction. The use of mineral additives (MA) for cements and cement-based materials allows not only to give them special properties, but also increases the volume of their production and use, as well as solves the issues of industrial waste utilization. For example, in Perm Krai in the territory of the Kizel coal basin the problem of liquidation of a large amount of coal mining waste (coal gangue) remains unsolved. The aim of the research is to evaluate the possibility and efficiency of using coal gangue as mineral additives in cement systems.

Materials and methods. Portland cement CEM I, self-ignited coal gangue, not ignited coal gangue and also uniform quartz sand were used as raw materials. Not ignited coal gangue was thermal activated at the temperature of 700 °С in muffle furnace during 2 hours. Chemical composition of coal gangue was determined by the fluorescent X-ray spectral method and mineral composition by the method of rapid radiographic quantitative phase analysis. Thermal analysis was conducted by synchronous DSC/TG analysis method. Flexural and compressive strength of cement mortar were determined according to GOST 310.4–81 method.

Results. According to the results of chemical and mineral analysis it was obtained that self-ignited coal gangue is mainly consisted of quartz (65.9 %) that may indicate pozzolanic properties. Whereas not ignited coal gangue mainly consists of kaolinite (41 %) and quartz (28.3 %). The presence of kaolinite, which was also confirmed by endothermic effect on the thermogram, enables to produce active mineral admixture — metakaolinite by thermal activation. It was obtained that flexural and compressive strength of mortar with 10–30 % cement replacement by self-ignited goal gangue is not reduced. Whereas compressive strength of specimens with 20 % cement replacement by thermal activated not ignited coal gangue is increased by 21 %.

Conclusions. The possibility of utilization of Kizel coal gangue as supplementary cementitious material was established by chemical, mineral and thermal analyses.

Introduction. The quality of life is inextricably linked with the comfort and safety of a person’s stay in an apartment of an apartment building or the premises of a country house, where he “spends” most of the time. The practice of a low level of housing and communal services in apartment building, which has been steadily established in recent years, has changed the preferences of the majority of the Russian population in choosing living conditions. This has led to a decrease in high-rise construction in favour of the construction of individual residential buildings. At the same time, the culture, a well as the organization of construction and operation of suburban residential villages, turned out to be not fully regulated in the normative and legal terms. In addition, along with the obvious advantages of an individual residential building in cottage villages and garden non-profit partnerships, issues of economic relations between owners of private houses, in terms of the operation of common property, also remain unresolved. The purpose of the study is to analyze the factors influencing the organization and implementation of the operation of suburban cottage villages.

Materials and methods. With the current level of technological development, the conveniences inherent in a city apartment can now be provided in any area, thanks to new building materials, autonomous heat sources, local treatment facilities and equipment. The work uses statistical data, the method of analysis and comparison.

Results. The level of engineering improvement of cottage villages, which indicates their category (economy, business, premium class), on the one hand, is attractive to owners of private houses, and on the other hand, in the absence of legislative regulation of issues of managing common property in cottage villages, the discrepancy between the intended purpose of garden associations in the future will result in significant problems in organizing their operation. The introduction of legal regulation will allow to remove controversial issues arising during the operation of cottage villages and garden associations, and improve the quality of life of their residents.

Conclusions. Legislative definition of the status of cottage villages, the composition of the common property of such residential complexes, will help to avoid conflict situations, ensure comfortable and safe living for residents of cottage villages, and determine sources of financing for the operation of common property.

Introduction. The relevance of the study is due to the importance of issues of increasing transparency and trust in the construction and installation works market. The purpose of the work was to select a digital platform as a basis for the development of a state system for rating participants in the contracting market with the development of a mechanism for forming a Contractor Reliability Register. It is noted that the issues of an integrated approach to the formation of such a register in the interests of all interested parties in the construction market are not sufficiently devised.

Materials and methods. In the study, the authors relied on analysis, synthesis, logic, methods of induction and deduction, methods of visualization and multi-criteria optimization, which allowed them to expand the theoretical provisions on the problem under study with logical generalizations and systematization, and to model the process of forming the Reliability Register of Contracting Organizations, taking into account the interdependencies of the indicators for assessing the reliability of the contractor.

Results. The main result of the study includes the justification of the choice of a digital platform as an information base for the formation of a state register using an extended criteria system for assessing the reliability of an applicant — competitor, which can also be used if contracts are concluded between a private investor and a contractor. Along with this, local results were a review of rating digital platforms for finding a reliable contractor; developed basic algorithms for forming a register and assessing the reliability of a contractor in public procurement through tenders; options for formalizing the integral indicator of contractor reliability.

Conclusions. The paper substantiates both the main characteristics of the Reliability Register of a Contracting Organization in Public Procurement and the process of its formation through a rating algorithm that reveals the substantive aspects of classifying a contestant as belonging to the appropriate level of reliability in the contracting market. By selecting bidders and determining their reliability during preparation for bidding, interested parties in the construction market will receive a tool for increasing the efficiency of investment allocation, including in infrastructure investment and construction projects for territorial development.

Introduction. The purpose of this paper is to analyze the relationship between the strategy of integrated territorial development and the methodology of life cycle management of construction projects.

Materials and methods. To achieve the goal of the study, an analysis of scientific publications presented in the RSCI for the period from 2021 to 2025 was conducted.

Results. International and Russian experience in integrated territorial development was analyzed, the main promising technologies for managing the life cycle of construction projects in the context of digital transformation of the construction industry were identified, the relationship between integrated territorial development and life cycle management of residential buildings and infrastructure facilities was revealed.

Conclusions. The key aspects of the relationship between the integrated territorial development strategy and the life cycle management methodology for construction projects, among which the key ones are the need to ensure the integration of long-term territorial development planning taking into account the dynamically changing needs of society; maintaining a balance between the technological modernization of construction projects and preserving the key approaches to sustainable urban development; ensuring the continuity of the stages of design, construction and operation of construction projects in the context of sustainable development. The mechanisms and technologies have been identified, the integrated application of which will ensure the best synergy of the IDT and the LCM methodology, which include: the use of predictive analytics and the Internet of Things, digital twins, information modeling technologies, etc. In addition, within the framework of the implementation of integrated territorial development projects, such areas as providing the population with housing, jobs, social, road and engineering infrastructure are important. In this case, it is advisable to consider these aspects within the framework of three types of IDT: integrated development of residential development areas; integrated development of non-residential development; integrated development of undeveloped areas.