Introduction. The article discusses the problem of selecting organizational and technological solutions for the installation of curtain facade systems in conditions of high variability of initial factors and uncertainty of design conditions. A proposed approach to formalizing the decision-making process based on simulation modeling, which includes a system of factors reflecting key architectural, structural, and organizational characteristics of the construction object.

Materials and Methods. The methodological part of the study aims to identify and systematize the factors determining the choice of organizational and technological solutions for the construction of curtain wall systems, followed by the presentation of their interrelations in a formalized calculation structure. The initial characteristics of the object are considered as a set of parameters transformed into indicators suitable for the comparative evaluation of alternative solutions reflecting the key architectural, structural, and organizational characteristics of the construction project.

Research Results. A structural model based on the decomposition of factors into utility and cost indicators, as well as an integral performance criterion, has been developed, enabling a quantitative comparison of alternative organizational and technological solutions. A procedure for applying the model is proposed, including the stages of generating initial data, factor decomposition, calculating integral indicators, and selecting a rational solution.

Discussion and Conclusion. A computational test of the model was conducted on a simulated facility with high architec-tural complexity, confirming its feasibility and practical applicability. It was demonstrated that the proposed approach allows for more robust selection of organizational and technological solutions by structuring factors and moving toward a quantitative assessment of effectiveness.

Introduction. The joints are elements of the exterior walls of large-panel buildings which are the most vulnerable to rain exposure. The quality requirements for their sealing fail to consider the location of joints in the exterior walls of buildings and the special features of their operation in wind conditions. Thus up to 20% of joints are vulnerable to rain exposure and are in need of re-sealing. The authors suggest differentiating the quality requirements for sealing these joints in order to address the problem at hand.

Materials and Methods. Nine- and ten-storey residential buildings with external load-bearing walls of single-layer expanded clay panels deisgned in Rostov-on-Don in compliance with standard designs of the 1-464D, 83 and 90 series, were selected as the objects of the study. In order to identify the joints which are the most vulnerable to rain exposure as well as the factors impacting their leakage in the exterior walls, visual and instrumental surveys of these buildings were conducted along with a questionnaire of the heads of the corresponding organizations. The analysis of the data was used in order to prepare the proposals for differentiating the quality requirements for sealing joints in the exterior walls of buildings.

Research Results. A total of 18 factors have been identified increasing the vulnerability of joints in the exterior walls of buildings to rain exposure. The nature of the indirect influence of each of these factors by means of a pressure drop created on both sides of the exterior walls during the operation of the building has been identified. Some proposals have been prepared for differentiating the quality requirements for sealing joints in the exterior walls of large-panel residential buildings considering wind exposure. Some recommendations have been provided in order to prevent leaks during rain of leaky joints in the exterior walls of operated large-panel buildings during the waiting period for planned repairs.

Discussion and Conclusion. The suggested differentiation of requirements for the quality of sealing joints in the exterior walls of large-panel residential buildings considering wind exposure would increase the reliability of sealed joints as well as the energy efficiency of a building, reduce the need for material and labor resources for repairs.

Introduction. The article examines reinforcement of metal structures in industrial buildings undergoing reconstruction and modernization. Modernization of production and restoration in constructional facilities results in increased operational loads on buildings and structures, thereby making structural strengthening essential. Therefore development of efficient structural systems and engineering solutions aimed at reducing structural weight and material usage, increasing labor productivity during their manufacture and installation, reducing construction time and, consequently, lowering costs has become an important realm in construction. A viable solution is to make use of hybrid steel beams, i.e., welded structures combining different grades of steel: high-strength steel is employed in the most highly stressed elements of the cross-section, i.e., flanges, whereas lower-strength steel is used in vertical webs. This reinforcement approach has not received sufficient attention in the scientific literature, which underscores the need for theoretical and experimental studies in the area. The aim of the study is to evaluate the effectiveness of bi-steel beams for reinforcing the structural elements of industrial facilities.

Materials and Methods. The methodological foundation of the study was a chronological analysis of scientific publications on the theoretical and practical application of metal structures in modern construction and reinforcement methods. While evaluating the effectiveness of using hybrid steel beams in reinforcement of metal structures, scientific methods of induction, deduction, generalization, and comparison were employed.

Research Results. The literature on metal structures and modern reinforcement methods was reviewed. The dynamics of scientific publications on metal structures over the last 50 years, as well as on reinforcement since the 1950s until 2025, has been analyzed. The actual efficiency of hybrid steel beams in reinforcement of metal structures in industrial buildings has been investigated. The dependence of an increase in the load-bearing capacity of a metal structure, reduction in its weight and costs on the use of different grades of steel has been identified.

Discussion and Conclusion. Hybrid steel beams in reinforcement have been proved to be more efficient in comparison to mono-steel structures. This solution has a direct impact on the technical and economic indicators. High-strength steel in flanges contributes to a significant increases in the load-bearing capacity of ta beam, whereas lower-strength steel for vertical walls reduces the overall weight of a structure and ensures a necessary level of ductility. A combination of these enhances an economic impact.

Introduction. This study is focused on the problem of minimizing anthropogenic impact on the urban environment. The relevance of the topic is due to the fact that the existing regulatory framework and standard design solutions for urban improvement frequently fail to consider the regional specifics of Western Siberia. The aim of the study is to design the principles of adaptability of landscaping facilities to the climatic conditions of Western Siberia, substantiate the selected principles taking into account the subsequent operation of facilities and landscaping elements.

Materials and Methods. The object of the study are urban territories designed for landscaping. The authors propose making use of the existing classification of objects and elements of landscaping with modification, which is based on dividing the urban environment into man-made and natural systems.

Research Results. Five principles of adaptation of landscaping facilities to the climatic and urban planning conditions of Western Siberia have been designed. These principles enable one to optimize costs at the pre-project stage, to consider the long-term efficiency of using landscaping facilities, to ensure multifunctional use of urban areas, to minimize waste, financial as well as labor costs during the operation phase.

Discussion and Conclusion. The principles of adaptation of landscaping facilities set forth by the authors are comprehensively evaluated using the calculated parameters, the efficiency of implementing the principles is demonstrated. The prospects of follow-up research are aimed at designing patterns of welfare adapted to Western Siberia.

Introduction. While a heat pump system is operating, the entry of vapor-liquid refrigerant droplets into the high-pressure zone is not acceptable, as it results in cavitation and equipment failure. Effective control of vapor superheat at the evap-orator outlet is key to ensuring safe and energy-efficient system operation. The aim of the study is to develop an algorithm and software for evaluating the evaporation kinetics of refrigerant droplets in the suction line in order to prevent cavitation and boost the energy efficiency of a system.

Materials and Methods. The study is based on a numerical algorithm for the problem of vapor-liquid refrigerant droplet evaporation kinetics. The algorithm includes automatic interpolation of the thermal and physical properties of liquid and gaseous freons at the evaporation line, calculation of kinematic viscosity, similarity criteria (Archimedes, Reynolds for evaporation), and identification of the average evaporation rate in a specific temperature gradient from –10 to +15 °C in 5°C increments at a pressure of 5 bar.

Research Results. A software application has been developed for modeling droplet evaporation parameters depending on the rheological properties of freons (R134a, R407C, R410A, R32). Calculations of the average vapor velocity were made at the evaporation line for droplets with diameters from 0.1 to 1.0 mm in the temperature ranging from –10 to +15 °C. Tabular and graphical dependences of the evaporation rate on the diameter of evaporating droplets for various refrigerant grades were obtained.

Discussion and Conclusion. The results enable us to evaluate the impact of heat and mass transfer on the energy efficiency of the freon circuit recirculation and to optimize the steam superheating parameters. The program can be employed as a digital twin for lifecycle management of a construction project with a heat pump system, as well as for developing some practical recommendations for identifying the ratio of the residence time of droplets in the steam flow and their evaporation time.

Introduction. Effective management of building engineering systems is a key challenge in modern construction and maintenance industry. The complexity of integrating individual subsystems, such as power supply, heating, gas supply, and ventilation, calls for implementation of new approaches to analyzing and predicting their lifecycles. As the demand for energy efficiency is growing, reliability, and resource conservation, development of intelligent control methods that minimize the risk of failure and optimize maintenance costs is of particular relevance. In spite of the considerable progress attained in automation and digitalization, existing solutions typically fail to provide a comprehensive assessment of the condition of engineering systems at all stages of their lifecycle. The aim of the study is to develop and test an intelligent model for managing the lifecycle of building engineering systems using artificial intelligence methods in order to improve operating efficiency of capital construction projects.

Materials and Methods. The object of the study are building engineering systems examined within the context of their lifecycle — from design to decommissioning. Lifecycle analysis of complex engineering systems, as well as machine learning and artificial intelligence methods, served as the methodological framework. In order to achieve these aims, a "Lifecycle of Engineering Systems" subsystem was developed as part of the energy resource management system. Time series analysis methods were applied, and a recurrent neural network with Long Short-Term Memory cells was implemented to predict the remaining service life and failure probability. Data on energy consumption and engineering system performance parameters were compiled based on real-world data. Model training and validation were performed by means of standard machine learning procedures, including data normalization and division into training, validation, and test sets.

Research Results. Throughout the course of the project, an intelligent model was developed and tested for predicting operating costs, failure probabilities, and optimal upgrade times for utility systems. The use of a neural network ensured high forecasting accuracy (the determination coefficient was 0.9873 on the control sample), as confirmed by a comparison of the actual and predicted failure rates. Implementation of the suggested subsystem automated the process of analyzing the technical condition of utility systems, to identify potential failures in a timely manner, and to schedule preventative maintenance. The economic impact of the implementation amounted to over 200 million rubles per year. Discussion and

Conclusion. The results demonstrate the high effectiveness of the suggested approach to intelligent lifecycle management of engineering systems. The developed model not only improves forecasting accuracy but also helps optimize operating costs, reduce the risk of accidents, and extend the service life of equipment. The theoretical significance of the work lies in the development of a methodology for comprehensive lifecycle analysis of engineering systems by means of artificial intelligence. The practical value lies in the scalability of the suggested solutions for various types of buildings and infrastructure facilities. Prospects for further research include expanding the functionality of a system, integrating additional data sources, and adapting the models for other industries.

Introduction. The relevance of this study stems from the digital transformation of the Russian construction industry and the need to improve the efficiency of investment and construction projects at all stages of the life cycle. The objective of the study is to develop and test a methodology for assessing the feasibility of implementing TIM technologies in the project work of construction companies.
Materials and Methods. The subject of this study is the domestic BIM platform Renga, which is focused on compliance with Russian regulations and ensures technological sovereignty in the context of limited access to foreign software. The study utilizes plugins, macros, visual programming tools (Dynamo, NVP rus), and an open API. The developed mey includes a system of quantitative and qualitative criteria, an expert assessment method, and the calculation of an integrated performance indicator for BIM implementation.
Results. It has been established that, in the context of technological import substitution, domestic CAD systems (in particular, Renga) in combination with automation tools (plugins, visual programming, macros, API) are capable of providing a functional replacement for foreign analogues while maintaining compliance with Russian regulatory requirements. A multi-criteria methodology for assessing the feasibility of implementing TIM technologies has been developed. The results of testing have demonstrated the significance of implementing TIM technologies, the high functional compliance of the selected software, the current shortage of digital competencies of personnel, and the cost-effectiveness of implementation. The final feasibility index fell within the range of 0.5–0.8, which, in accordance with the developed scale, justifies the conditional feasibility of the transition with the implementation of compensatory organizational and personnel measures. A roadmap for the phased implementation of TIM technologies has been formed. Organizational and managerial measures are proposed to reduce personnel and managerial risks during the transition to TIM.
Discussion and Conclusions. Promising areas for further research could include: refining the weighting factors of the criteria system by involving a larger number of experts, expanding the list of TIM tools assessed taking into account new domestic solutions, adapting the methodology for organizations of various organizational and legal forms and sizes, and developing automated information systems for decision support based on artificial intelligence.

Introduction. The article discusses the current issues of automated design decision-making based on an information model of a construction object. The research problem is related to the need to improve the quality of construction products by parametrization of design solutions and digital support for life cycle management.

Materials and Methods. The study was conducted using system analysis, structural and logical analysis, methods of information and parametric modeling, algorithmization of design procedures, and applied computational and graphical procedures implemented in Grasshopper, Tekla Structures, and other BIM-oriented software systems.
Research Results. Using the example of automated design of a heating network pipeline support it was shown that a parametric information model ensures automatic reconstruction of structural elements when the input data change, improves the consistency of design solutions, and reduces modeling time from 20–30 minutes down to a few seconds.
Discussion and Conclusion. The results confirm the feasibility of making use of automated algorithms and parametric modeling as a tool for quality management of construction products at the design and subsequent implementation of an investment and construction project.

Introduction. The construction sector is one of the most energy-intensive activities. Unlike the operational phase, which has been the focus of most studies and regulatory requirements, construction sites have been considered a temporary and difficult-to-control source of energy consumption. The urge to improve construction energy efficiency, reduce greenhouse gas emissions, and lower operating costs underscores the paramount importance of implementing information modeling methods integrating data on resources, schedules, and energy consumption into a single digital environment.

Materials and Methods. The methodological foundation of the study is based on integrating information modeling and predictive analytics approaches. The study was completed in the three following stages: developing a theoretical and methodological framework; designing an algorithm for data collection, verification, and integration; and justifying the choice of a toolkit. The theoretical foundation was formed by a body of scientific research in the fields of energy conservation, scheduling, and application of information modeling in construction.

Research Results. A methodology has been developed that based on the initial cost estimates, allows for an analysis the need for labor resources for construction and installation within the timeframes approved in the work schedule. The approach ensures construction organization, eliminates machine downtime, and thus contributes to optimization of fuel and energy resource consumption during the construction phase.

Discussion and Conclusion. The research results confirm that traditional construction management methods fail to realize the energy savings potential. The suggested approach ensures a transition from a stochastic description of energy consumption to a deterministic model based on objective data. Comprehensive accounting for energy resource consumption at all stages of the lifecycle of a building is essential for systemic energy savings. The practical implementation of the methodology serves as the foundation for improving the regulatory framework increasing the reliability of energy resource forecasting, and implementing sustainable energy-efficient practices in the construction industry.

Introduction. An analysis of the current state of the air environment in large industrial centers has led one to the conclusion that construction industry enterprises are considered to be one of the major pollution sources. In turn, some of the most significant technological sections of such enterprises is the casting section of artistic metalworking using die-casting grates causing a negative impact predominantly due to the dust from burnt molding sand with a SiO₂ content of more than 70%, on the one hand impacting the workers, and, on the other, directly the technological equipment, i.e., shake-out foundry grids. The effect of such dust on the structural elements of the shake-out foundry grid leads to increased abrasive wear, which causes a significant reduction of their service life and, thereby, the entire life cycle of the knockout grate as a technological equipment.
Therefore the authors have identified the need to increase the service life of the casting sections of construction industry enterprises, as well as to improve their environmental and industrial safety by means of improving the technology and developing autonomous engineering solutions for dust control as a scientific issue.
The aim of the study is to increase the life cycle of the casting sections of construction industry enterprises by means of reducing the dust concentration to the regulatory values in the air of operating areas and preventing the release of dust into the air of industrial sites, while enhancing the efficiency of dust suppression based on its study and development of an appropriate highly efficient engineering technology.
Materials and Methods. The authors based their study on analytical methods, physical modeling, mathematical description, and statistical processing of experimental data.
Research Results. The study has identified that:
- the scientific justification and description of air pollution in the operating area of the knockout grate can serve as the foundation for a step-by-step study of pollution reduction, and thereby ensuring the regulatory dust content in the operating area and preventing the release of dust into the air basin of the industrial site for foundry sections of construction industry enterprises;
- the physical and energy scientific concept previously set forth by the authors allows for describing dust pollution and its reduction from the standpoint of ensuring sanitary and hygienic requirements and environmental protection making it possible to develop a highly efficient and cost-effective dust suppression device;
- the results of the experimental studies performed in laboratory conditions allowed the authors to make it possible to ensure there are no dust-laden air emissions into the air of the industrial site.
Discussion and Conclusion. It should be noted that the recirculation of air flows in the area where dust suppression is implemented implies there are no polluted air emissions into the environment, and therefore significantly increases the efficiency of the said process while contributing considerably to ensuring environmental safety while operating blowout grates in construction industry enterprises. The research results enable one to conclude that the integrated efficiency of dust suppression of burnt molding sand can be up to 98.5 % if the developed device is in use due to the optimization of the sequence, methods, and parameters of the main stages of dust suppression.

Introduction. The technology of three-dimensional information modeling is end-to-end for the entire life cycle of a construction project and is critical for modern architectural and construction design. What stands out among the current trends in developing building structure design using a computational approach, i.e., algorithmization of modeling processes and drawing design based on programming. In order to implement this approach in an effective manner, a methodological foundation is required that can be provided by means of a structural and functional model of information processes. The aim of the study is to develop a model of design processes based on the traditional and computational approaches to improving the effectiveness of managing the life cycle of construction projects.
Materials and Methods. In order to study the structure and functional relationships of designing building structures, the study makes use of the SADT structural-functional analysis method in the IDEF0 notation.
Research Results. A classification of design tasks for load-bearing building structures is presented. A structural-functional model of building structure design has been developed by means of 3D digital information modeling technology for the traditional approach and an algorithmic approach based on an external data source, for integration and parametrisation of generating computational and information models of building structures.
Discussion and Conclusion. Based on the analysis of the obtained models, it was concluded that implementing an algorithmic approach to designing load-bearing building structures based on an external data source is promising. It is expected that the quality of the project output will be improved by eliminating the stage of converting information and calculation models of building structures and establishing end-to-end parametric links between the models and documentation.