The article considers the historical and cultural heritage of villages of the former Ketskaya volost, which is currently a part of the Tomsk region. The formation of Ketsky prison and the architecture of large settlements of the former Ketskaya volost are studied. Little is known about the historical and cultural heritage of villages of the Tomsk region and the problems of preserving historical settlements of the country.

The aim of this work is to study the formation and development of the village architecture of the former Ketskaya volost, currently included in the Tomsk region.

The following scientific methods are used: a critical analysis of the literature, comparative architectural analysis and systems analysis of information, creative synthesis of the findings. The obtained results can be used in preparation of lectures, reports and communication on the history of the Siberian architecture.

The scientific novelty is a study of the historical and cultural heritage of large settlements of the former Ketskaya volost, which has not been studied and published before. The methodological and theoretical basis of the study is theoretical works of historians and architects regarding the issue under study as well as the previous  author’s work in the field.

It is found that the historical and cultural heritage of the villages of the former Ketskaya volost has a rich history. Old historical buildings, including religious ones are preserved in villages of Togur and Novoilinka. The urban planning of the villages reflects the design and construction principles of the 18th century. The rich natural environment gives this area a special touch. 

Design/methodology/approach. This article is devoted to the problems of natural morphogenesis in architecture. To date, many scientific papers have already been published in the field, including those devoted to organic architecture, Japanese metabolism, postmodernism, architectural bionics, hi-tech, etc. This study is the author's appeal to the bio-tech style, which has received a huge polarity in modern architecture.

Research findings. This paper reviews and studies architectural styles and trends of the 20−21st centuries and determines the place of the bio-tech style among other architectural styles. It shown how other styles influence its appearance and further development. The review is based on a comparison of the hi- and bio-tech styles. The data for the general study and comparative analysis are taken from written and Internet sources as well as the authors’ observations of the practical implementation of the bio-tech principles in the works of modern architects (N. Foster, H. Senosian, S. Calatrava). The research results demonstrate wide possibilities of using the bio-tech style in a wide variety of buildings. The obtained results can find wide application in educational, competitive (conceptual) and real design. 

Nowadays, the Soviet modernism is one of the most unexplored areas of the Russian and world architecture, which can cause the loss of objects of the cultural and artistic value. The public catering was an important branch of the national economy of the USSR. It led to the mass construction in the country.

Purpose: The aim of this work is the multi-aspect analysis of the trends of Soviet modernism used in the design and implementation of public catering enterprises in Rostov-on-Don during the 1960s and 1980s.

Design/methodology/approach: The scientific, journalistic literature and archival materials are used in the work. Full-scale studies are performed in relation to preserved buildings of canteens, cafes and restaurants in Rostov-on-Don, dating back to the period of Soviet modernism.

Research findings: The soviet modernism is studied for the period of the 1960s and 1980s, and the author's reconstruction of partially or completely lost structures is suggested herein.

Practical implications: The obtained results confirm the cultural and artistic value of the architectural objects of the Soviet modernism era and can be used for their preservation and further studies. 

It is necessary to improve the architecture quality of multi-storey residential clusters through increasing the aesthetic expressiveness of facades. Modern environmental technologies, for example, alternative energy sources used as facade elements, require a review of façade archirecture. The proposed methods allow evaluating the architectural expressiveness and harmony of facades to improve the structural composition of residential clusters. These methods involve the identification of qualitative characteristics of facades of multi-storey buildings in which environmental solutions are applied. The paper proposes the system of specific indicators, according to which the facade elements can be quantified. This method will increase the façade architecture using modern environmental technologies without high expenditures.

The article covers historical and cultural heritage of Tyumen and Tobolsk, which are the capitals of the Tobolsk region. Historical cities of Siberia have rich historical, cultural and architectural heritage. 

The aim of this work is to assess the role of merchantry in the architectural image of West Siberian cities such as Tyumen and Tobolsk.

The novelty lies in a full analysis of historical buildings of Tyumen and Tobolsk, identification of the role of local merchantry in establishing their architectural image and preservation of historical and architectural heritage.

The scientific methods include a complex scientific analysis of historical archives and of bibliographical sources, a systems and architectural analyses of the research findings. Practically, the research results can be used in preparation of lectures, papers and essays on the history of the Siberian architecture.

The work is based on theories and methods of historians and architects, and the full-scale experiment carried out by the authors in the years 2013−2019.

It is shown that merchant buildings are extremely valuable. The majority of the assessed buildings are historical and architectural monuments of the local and federal significance. Buildings financed from merchant’s funds preserve knowledge about the history of towns, urban planning culture of the region, development of architectural styles, social and economic standards of the West Siberian cities late in the 19th and early 20th centuries. 

The paper considers preconditions and stages of the town-planning processes in Krasnoyarsk in the 1950-60s that define break of historical continuity in the development of architecture of the Siberian city. Based on documents, the most interesting events connected with the last period of the existence of the Host Resurrection Cathedral on Strelka, the oldest stone building of the city are described. The interaction between the representatives of the architectural community and the authorities in this period is studied. This interaction is directed toward the volitional order of the accelerated approach to the bright future and distortion of traditions of historical evolution of the society.

The article describes the stability improvement of a transversely corrugated wall by using a double profile of corrugation (multi-corrugation). A comparative analysis is performed for the stress-strain state of the transversely corrugated beams with different profile, including the double profile corrugation. Numerical experiments are carried out with predetermined design patterns for corrugated beams with the similar spans, boundary conditions, loads and material properties. The loss of stability of the corrugated walls with safety factors, deformation patterns and isofields of the normal and tangential stress distribution are obtained for the considered beam models constructed in LIRA-CAD building design and calculation program.

The paper deals with the problem of producing heat-insulating ceramic bricks using ash microspheres. The influence of the main technological factors on the ceramic material properties and physicochemical processes in composition preparation is investigated. Clay raw materials of the Verkhovaya deposit of the Tomsk region and ash hollow microspheres of the Belovskaya power plant are studied. It is found that 80 % ash microspheres in the mixture composition reduces the average density by 50 % and water absorption by 28 %; and increases thermal conductivity by 50 %, average compressive strength by 22 % and flexural strength by 30 %. According to the Xray analysis, laboratory samples represent the following crystalline phases: quartz, gehlenite, albite, kyanite, anorthite- and mullite-like compounds. The presence of these minerals in the composition improves the strength properties of the resulting calcined compositions. Microscopy observations show that the structure of the samples is mostly uniform, with a significant number of closed and half-closed pores, that are difficult to reach and inaccessible to water. This factor significantly affects the frost resistance of the product, causing stress relaxation arising from water frozen in pores. As a result, the obtained laboratory samples have the improved thermophysical quality.

In connection with the 90th anniversary of Professor Rogov, Doctor of Geological and Mineralogical Sciences, (1930-2008) the paper presents a review of his main publications. The activity of the scientist as an organizer of research and academic activities at higher school is described. Prof. Rogov and his students have made a significant contribution to the study of geoecological problems of water resources in southern Siberia, the development of theoretical foundations and technologies for the implementation of governmental programs to provide the population with drinking water. The scientific heritage of Prof. Rogov became a classic and is in demand for databases on reserves and quality of mineral waters in the West Siberian region; estimation of ecological and hydrogeological consequences of intensive operation of underground waters by large water intake facilities; studying the problems geo-ecological safety of urbanized territories.

The sand slurry flow in a cylindrical pipe is investigated using the Ostwald de Waele model. The dependence of the fluid flow rate on the pressure drop is determined, dependencies for the radial distribution of velocity and effective viscosity of flow are obtained. It is shown that the distribution of effective viscosity is characterized by a monotonic increase as it approaches the pipe walls. As the consistency increases, the mechanical energy dissipation of the flow also increases leading to an increase in hydraulic resistance. During the flow of dilatant media with the low nonlinearity index, the hydraulic resistance decreases with increasing pressure drop. When this index is 2, the hydraulic resistance does not depend on the pressure drop and is determined only by the liquid properties and the channel size. At highe values of the nonlinearity index, the increased pressure drop leads to an increase in hydraulic resistance. Keywords

The object of the study is a pile-raft foundation or mat foundation 180 cm thick of a 25-storey building made of a reinforced concrete frame. When constructing a pile foundation, some of piles are not completely sank down to the reference points. In this connection, it is necessary to identify the reasons and load-bearing capacity of piles, given the soil compaction between piles and under their tips and the possibility of using such piles for further building construction.

After studying the materials of soil investigation, the analysis of occurrence, composition, physical-mechanical properties of soils, and the pile field, the stress-strain state model is developed for the pile-raft foundation using the MicroFe software application with the development of design model for the foundation-base-building system.

In the compacted soil state between the piles and under the pile tips, the conditions of the ultimate and service limit states are met at the actual depth of pile sinking for the raft foundation. 

Sediments from iron removal stations are a source of environmental pollution. It is necessary to find effective and eco-friendly methods of sediment disposal. The paper investigates the properties of iron-containing sediment in order to develop a technology for its further utilization. It is shown that sediments from the iron removal station of Velizhansky water intake have a stable chemical composition with about 70 % Fe2O3, and a stable particle size distribution, i.e. 20 μm for ≈ 87 % of particles. These parameters allow developing a flow chart for iron reduction in heated carbon monoxide. The involvement of sediments from iron removal stations in the high-dispersive metallic iron powder production eliminates the sediment deposit at landfills or storage tanks and creates a new raw material base for additive technologies.

The bridge pavement perceives millions of live load application cycles during its service life. Therefore, fatigue defects often occur in asphalt. These defects are associated with insufficient fatigue strength, for example, top-bottom cracks that appear after several years of operation and grow from top to bottom. These cracks cause more serious defects. It is necessary to prevent their occurrence.

The purpose of this article is to increase the asphalt service life on bridge superstructures by developing the pavement design method. To achieve this goal, the pavement fatigue strength is analyzed. Firstly, asphalt stress-strain state is determined under the heavy load. Secondly, a safe stress level is prescribed. At this stress level, asphalt receives the required load cycles without failure. A significant increase in the orthotropic steel deck stiffness is determined to be necessary.

The practical significance is the analysis of several ways to reduce asphalt stresses to the required level. The effectiveness of these methods is evaluated. New problems are identified that will enable the development of the computation method for the bridge pavement and its practical applications.

The originally includes the pavement fatigue strength analysis on road bridges with regard to the temperature influence on the asphalt fatigue strength.