Purpose: Identification and investigation of the presented industrial architecture of Kurgan-city built by the merchant D.I. Smolin late in the 19th and early 20th centuries. Methodology/approach: During the society transition from industrial to post-industrial development, some enterprises have lost their original function and need preservation and actual use. Historical industrial enterprises in the city of Kurgan are no exception. Scientific analysis of described objects based on architectural, artistic and three-dimensional parameters, their preservation and modern functional use. Research findings: Identification of preserved objects built by D.I. Smolin, namely: distillery, mill, official wine warehouse. These objects underwent many changes manifested in their three-dimensional solution. They carry the memory of a bygone era and need to be more carefully studied and preserved. Practical implications: The possibility of using the results in studying the history of architecture of Siberian cities. Originality/value: Collected and systematized documents on the industrial architecture of Kurgan by the merchant D.I. Smolin.

Purpose: Substantiation of the importance of wooden churches in the south of the Tyumen region in preservation of the architectural style of settlements in the present time. Methodology: Integrated approach, including the analysis of pre-revolutionary and modern archival,  bibliographic  sources  and  related  research  works.  Full-scale  survey  (photographs, measurements), analysis and systematization of research results. Studies of works of S.N. Balandin,  V.I.  Kochedamov,  A.Yu.  Mainicheva  dedicated  to  the  architecture  of  Siberia  and A.S. Ivanenko, B.A. Zhuchenko, S.P. Zavarikhin, E.M. Kozlova-Afanasyeva, V.E. Kopylov on the history of the Tyumen region. Research findings: The paper considers prerequisites for the appearance of the Orthodox wooden churches in Siberian cities in the 18-19th centuries, their architectural styles and valuable characteristics. Practical implications: Research results show the crucial role of wooden churches built in the 18-19th centuries in the south of the Tyumen region in preservation of the architectural style of modern settlements.

Purpose: Analysis of the evolution of the functional and planning structure of leisure club institutions. An attempt to understand how the architecture of the club changed, its structure, and what influenced it. Мethodology/approach: Analysis of the experience of designing club facilities in various regions. A more detailed study concerns the Russian experience, but other regions are also being considered at different stages. The main method in the study is the analysis of graphic materials to assess the functional and planning structure. Research findings: Club-type leisure facilities are very popular. In terms of functional saturation and planning structure, their architecture is diverse. It can be influenced by the design, specific tasks, focus on a certain social group, and historical stage. Identification of the specifics of club facilities in different time periods provides the better understanding of the club architecture as an important leisure object of the past and present. Identified are the functional planning structures for different periods as well as the reasons of their evolution. The diagrams are suggested for the development of the club architecture, functional changes, dominance and interaction of its individual parts. Practical implications: The development of the club architecture and identification of factors influencing it determine the architecture at the present stage and demonstrate the importance of certain social and regional features. Originality/value: The identified stages clearly demonstrate changes in the functional and planning structure of the club, the original idea of leisure facilities and the evolution into modern clubs.

With the creation of the first computer and beginning of digitalization, the emergence of new functional and planning types of media objects have significantly accelerated. Here belong architectural objects and spaces that solve the problems of communication and information exchange processes. Combined IT and new design approaches to media objects appear by the end of the 20th century. Their architecture reflects a rapid change in the society caused by technological progress, economic and political factors.

The development trends of media objects late in the 20th century facilitated the development of multifunctional complexes such as media centers, functional and planning types of which are being currently developed. Design and formation of media centers exhibit a changing cultural paradigm, which reflects the technological progress. The article discusses the impact of rapidly developing information technologies on the architecture of media objects. The main results include the diagram of the evolution of architectural types of media objects in the context of IT and the formation of foreign media centers.

Purpose: The aim of this work is to determine the architectural space components for the creative activity of children in a modern school. Design/methodology: The description of modern design and construction of school buildings in Russia and abroad; identification of factors influencing the formation of the aesthetic aspect of the architectural space of a modern school; theoretical modeling of typological layout of individual structural elements of the architectural space for creative activities in a modern school; analysis of the functional zoning and compositional parameters of the architectural space to identify the architectural space qualitative parameters disclosing the creative potential of students. Research findings: Identification of the main algorithms of the architectural space design for the creative activity of students in a school with a specific atmosphere that has a beneficial effect on the perception of new knowledge and disclosure of the creative potential of students. Practical implications: The obtained results and proposed recommendations can be used in green architecture and development of regulatory documents on the school building design; the program preparation in project activities; in studying the individual structural components of the architectural environment within the artistic and aesthetic aspect. Originality/value: Architectural means determine the formation of the aesthetically oriented architectural environment for creative activities in modern schools and identify the qualitative parameters of the given space. The architectural environment of the creative activity represents a new type of individual structural elements of a modern school building focused on a disclosure and growth of creative potential of students with optimum opportunities.

Purpose: The analysis of the architecture of the first post-revolutionary decade, processes and origins of the new style constructivism. The paper highlights the architecture of this period. Design/methodology/approach: Interesting factual material on proto-constructivism and its main problems. Comparison of different viewpoints on the processes in Novosibirsk architecture and the analysis based on the data collected. Research findings: This style is preceded by rather an interesting stage of creative research, which needs a special study. At that time, a significant number of public and administrative buildings were built in Novosibirsk, which was associated with its transformation to the administrative center of the Siberian Krai. It was an important period in the history of the Soviet architecture, when a search for a new creative method, architectural principles was carried out in the capital and regions, although  researchers  paid  less  attention  to  it than  to  constructivism.    Architecture  of post-revolutionary decade is characterized by a multi-vector nature and a pronounced desire for rationalism and functionalism, while still retaining the styles of the previous era associated with the struggle of various directions; new stylistic search for the post-revolutionary period. Practical implications: The obtained results contribute to the study of origins of the Soviet avantgarde architecture and can be used in further research and training manuals in the field. Originality/value: The analysis of the different viewpoints on the reasons for the Soviet avant-garde architecture development; comparison with the facts; identification of differences between the viewpoints, which is important for further study of this topic.

The problem of renovation of club buildings in modern Russia dates back to the 1990s. However, significant reforms in the sphere of cultural objects occurred only in 2013. In order to preserve and improve the existing system of club buildings, it is necessary to update knowledge in the field of club building construction in Siberia.

The article studies the formation of Siberian club building in the Soviet and modern theory of architecture. The studies of urban planning and regional architecture of Siberian club buildings distinguish their influence on the development and construction of Siberian cities. Other investigations include the architectural style of club buildings. The latter are regarded as Stalinist architectural monuments, constructivism and creative concept ASNOVA-ARU.

The paper presents the analysis of the edge effect in the wall bending of a vertical steel tank RVS-20000 using a comparison between the results obtained by using the bending theory and membrane theory. It is shown that the condition of the wall-bottom joint strength is satisfied in both cases.

The stresses obtained according to the bending theory with regard to multiplying safety factor, exceed the maximum stresses by 11.1 % obtained by using the membrane theory with account for the edge effect. This makes it possible to use the membrane theory equations in calculating the wall thickness, which excludes complex calculations of the bending theory. Unlike the membrane theory, the membrane theory provides the stress and strain calculation of the T-junction. The results obtained indicate that the service reliability of the wall-bottom joint is primarily determined  by the preparation  quality of the  tank base,  welding  quality of the T-junction (including negative temperatures) and the methods of their flaw detection on the construction site.

Purpose: The aim of this work is the development of materials and technologies, which provide their repeated life cycle. Methodology/approach: Scanning electron microscopy, thermogravimetric analysis, X-ray diffraction analysis. Research findings: The processing method is proposed for fluorocarbon-containing waste (RUSAL, Krasnoyarsk) resulting in the formation of submicron-sized carbon in the form of a coal-water slurry for solution and/or concrete modification. It is shown that carbon in the coal-water slurry represents flat plates with the submicron-sized particles. The degree of cement hydration increases with the addition of wastes, indicating the material strengthening, which is consistent with the results of strength tests. The acicular spike crystals of hydrated calcium silicates become larger and thicker, that confirms the assumption that hydration increases with the addition of submicron-sized carbon particles. Practical implications: The obtained physical and mechanical properties of the cement-sand mortar show the possibility of using the proposed modifiers in the production of materials with high bending strength at early stages to reduce cracking, especially in thin concrete layers with a large coverage area.

In modern construction, mineral additives are considered as important concrete components, which improve many technical parameters. Being an inert additive, finely dispersed limestone behaves as a reactive one in a system with super- and hyper-plasticizers, especially in a hardening cement, with the formation of a gas phase. The outgassing is influenced by the system rheology and can be significantly increased with deceasing viscosity, for example, when working with self-leveling mixtures. In this case, the micro-filling function of dispersed  additives  may  be  not  sufficiently implemented,  and  the optimum content  has  not a positive effect on the structure and properties of concrete. It is therefore advisable to evaluate the compatibility of mineral and chemical additives, which has been little studied to date.

A search for new methods for the synthesis of magnesium-aluminum ceramics is currently an urgent task for the refractory, metallurgical, and optical industries. The paper presents the experimental results of the magnesium-aluminum spinel MgAl₂O₃  synthesis in the thermal plasma. The samples are synthesized from natural materials such as magnesite MgCO₃ and boehmite γ-AlO(OH) in the stoichiometric ratio Al₂O₃/MgO = 2.53. It is shown that the optimum conditions for the ceramic sample synthesis include 100 A current strength, 90 V voltage, 1 g/s gas rate, 30 s melting time. In these conditions, the formation of a hemispherical melt drop is observed, which confirms a complete melting of the initial components. The density of the crystallized sample is 3.5 g/cm³. The synthesized ceramic matrix is characterized by a high concentration of the stoichiometric phase MgAl₂O₄. At the same time, for 2θ = 29.4° and 30.8°, the reflection splits, thereby indicating to the nonstoichiometric spinel (Mg, Al)Al₂O₄  of variable composition. The ceramic matrix morphology represents prismatic grains 30–60 µm in size connected by fibers with a diameter of 1–3 µm.

Global warming promotes the acceleration forces all countries to reduce fossil energy sources and increase renewable energy sources with the development of environmentally friendly resource-saving technologies. The vast territory of Russia is permafrost or has seasonally frozen soils. The use of renewable energy sources, especially solar energy sources, is especially important for such territories.

The article presents the experimental results of the operating modes of a pilot industrial solar hot water supply system with two vacuum tube collectors after snow pollution or icing of pipe surfaces. This technique is used to measure the hourly values of thermal energy from the conversion of solar radiation by collectors with polluted and cleaned collector surfaces on a sunny day after snowfall or icing. The average hourly value of solar insolation (with contaminated surfaces and after their cleaning) is obtained by integrating the meter recordings on the incident heat flux from the sun (by 600 values each) at an interval of 6 seconds. It is found that when the collector pipe surface is iced, the decrease in the thermal energy supply is maximum and amounts to 36.96 %. In other cases it varies from 8.51 to 13.47 %.

The presents engineering and environmental surveys on the environmental components such as soil and vegetation cover, atmospheric air, fauna. These surveys are conducted for the new proposed construction sites locating in the floodplain of the Tom River and the terrace above the floodplain. The purpose of the work is to obtain the necessary amount of base-line data for geo-ecological characterization of the current state of the environment. The engineering and ecological surveys show that the considered sites are suitable for a construction and do not provide geo-ecological, economic and social negative consequences.

Purpose: The purpose of this work is to suggest dependencies for pipelines with deposits in gravity flow water distribution systems. Methodology/approach: Hypotheses and formulas for the pipeline hydraulic analysis; regulatory documents on the water disposal. Research findings: The paper presents the hydraulic analysis equations of gravity flow water distribution with internal deposits. The current regulatory documents contain methods of the hydraulic analysis for new pipelines only. At the same time, deposits of various structure can appear on the pipeline walls under certain conditions, which affect the hydraulic parameters of the system. The dependences are suggested for pipelines with deposits and the concept is proposed for the reduced pipe diameter. Value: Further directions are identified for studying the influence of the thickness of the sediment layer in the pipeline on its hydraulic properties. A need for tabulating the results of the hydraulic analysis of pipes with gravity flow distribution with internal deposits is substantiated.

Purpose: The aim of this work is to compare three methods of the progressive collapse analysis of the experimental building skeleton based on the stress-strain state of the columns and joints. Design technique: The stress-strain state modeling of the columns is performed for the building with the removed intermediate column in the basement. The building includes a basement and represents a reinforced concrete composite frame without collar beams. The MicroFe software is used for three modeling methods, which include quasi-static, dynamic, and kinematic method of limit equilibrium. The MicroFe analysis is combined with the development of the three-dimensional model on a rigid foundation. Findings: The progressive collapse is proven to be impossible for the building skeleton after the removal of the intermediate column in its basement. Originality/value: Based on the three analytical methods, the limit load reproducibility is 15 %. The dynamic analysis gives higher values of the limit load as compared to the quasi-static and kinematic methods. Practical implications: The proposed procedure of three methods for the progressive collapse analysis can be used for the seismic vulnerability analysis.