bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of the Effectiveness of the Transition from an Open Heat Supply Systems to a Closed One
Authors: Biryuzova E A , Glukhanov A S
Published: March 2021

A promising direction in terms of improving heating networks is the transition from an open heating system to a closed one, which meets modern requirements fixed at the legislative level. However, the effectiveness of such measures is ambiguous. Despite the fact that closed systems maintain high quality water for hot water supply, stable hydraulic mode, automatic regulation of heat supply, their advantages are questioned. At the same time, open systems have significant advantages that, in some cases, give preference to: low corrosion rate of metal in pipelines and equipment due to the use of boiler-quality heat transfer agent that has been processed at a heat source, low cost of ITP, due to the lack of heat exchange devices that increase the cost of thermomechanical equipment, the use of exhaust steam from turbines of thermal power plants and thermal power plants, which increases the efficiency of heat supply. The disadvantage is the low quality of water for hot water supply systems and the need to replenish open heating networks with large volumes of prepared and treated water. A comparative analysis of costs in the transition from an open heating system to a closed one is devoted.
Unauthorized Building as an Object of Improper Civil Construction
Authors: Storozheva A , Dadayan E , Letyagina E
Published: March 2021

The purpose of the study described in this article is to identify the problematic issues that arise during the construction of unauthorized real estate. The study examines fair and unscrupulous actions of developers and proposes appropriate algorithms for solving the problems of regulating unauthorized civil construction projects. The authors analyze the indicators of improper construction of unauthorized construction objects.
Actual Issues of Control and Supervision of Construction
Authors: Storozheva A , Dadayan E , Letyagina E
Published: March 2021

The purpose of our study is to identify the problematic topics that arise during the implementation of measures by supervisory bodies in the construction of real estate facilities. The study examines the directions and ways out of these situations. On the example of a constituent entity of the Russian Federation, the Krasnoyarsk Territory, we analyze performance indicators of construction supervision and residential control services, determine effectiveness and need for state regulation of reconstruction, overhaul, redevelopment and construction of real estate objects through control measures.
Behavior of the Support Made of Concrete Grades B25 and B35, in the Conditions of Disturbed Ground Rocks
Authors: Batarshin V , Semiokhin A , Gulevatenko A
Published: March 2021

When building underground structures in difficult mining and geological conditions, there is always a question of comparing the price and quality of the materials used. During the construction of underground structures in complex geological conditions. The purpose of this article is to select concrete for lining, which will meet the optimal technical and economic parameters in the conditions of disturbed ground rocks in the South of Kazakhstan.
Mathematical Model of a Filter for Water Treatment Using Biofilms
Authors: Bobyleva T N , Shamaev A S
Published: March 2021

The paper considers the principles of constructing a mathematical model of water treatment based on the use of a biologically active layer, the bacteria of which absorb harmful impurities contained in water. A system of equations is presented on the basis of which a model of water purification is constructed in the simplest element, which is a rod covered with a biofilm. The system of equations is a system that includes a parabolic equation in a three-dimensional domain and a hyperbolic equation on a part of the surface of this domain, connected to each other through a boundary condition and a potential in an equation of hyperbolic type. Next, an asymptotic analysis of this system is carried out, which allows us to reduce the model of an individual element to the solution of a simple ordinary differential equation. On this basis, a model of the entire water treatment device is proposed.
Autonomous Air Shutoff Valves and How They Work in Northern Climate
Authors: Slobodchikov E , Struchkov E
Published: March 2021

For the Republic of Sakha (Yakutia), effective and reliable ventilation of buildings is imperative for human comfort and for appropriate air change. Demand for wall vents is rising in mass housing construction. However, practical experience has shown that neither domestically made nor imported vents are suitable for the Republic’s cold climate. At the same time, improving the airtightness of building envelopes remains indeed a relevant undertaking in the context of providing a comfortable indoor microclimate.
Evaluation of the Effectiveness of Alternative Options for Strengthening Inclined Sections of Beams with Prestressing Reinforcemen
Authors: Belutsky I Y , Alekseeva I D
Published: March 2021

The article provides an assessment of the effectiveness of technical solutions to strengthen the beams of spans of road bridges and indicates the advantages of using alternative reinforcement options in comparison with known solutions. The necessity of considering the collaboration of concrete and reinforcing elements on the principal planes of the webs of beams of the span is revealed. A method for determining the period of serviceability of a span is presented, as well as the dependence of this parameter on the strength characteristics of concrete beams. Calculated data are presented that allow critically assessing the effectiveness and the possibility of using various options for increasing the period of serviceability of the span of road bridges. The obtained results allow drawing conclusions about the validity and effectiveness of the proposed solutions for strengthening the span, as well as the prospects for using typical structures of previous generations in modern operating conditions.
Communication Barriers of a Construction Company’s Network Management
Authors: Demchenko V , Khoroshevskaya J , Krukov K
Published: March 2021

The article deals with the problematic aspects of inefficient communication in the production cycle from the point of view of enterprise management. The problem is considered from the perspective of different Sciences: linguistics, management, production organization. It is proposed to use information and Intelligent environments, software systems for modeling and production management. The article notes the importance of expert solutions in the innovation process. Based on the information approach to the development of communications, the possibility of creating institutional forms of innovation in the management of construction production is shown.
Railway Architecture Along the Chinese Eastern Railway at the Beginning of the 20th Century
Authors: Glatolenkova E V
Published: March 2021

The article presents an analysis of railway complexes architecture in the settlements along the Binzhou Railway, Binsui Railway and the part of the high-speed line Hada Railway in Nothern China. That settlements was built by engineers from the Russian Empire in the early 20th century as stations of the Chinese Eastern railway (CER). To create all the conditions for the operating of the road, it was important not only to lay the track, but also to create infrastructure for servicing trains and ensuring a comfortable housing for the growing population. The tight construction time required the use of standard projects on the road. These buildings that have survived to this day have become objects of close attention of architectural historians and restorers. In a number of cities, former locomotive depots are being converted into museum spaces, old railway stations are being restored and included in tourist guides. This paper examines the history of construction of these objects in order to study the design features of utilitarian architecture on the territory of the CER during the construction of the Trans-Siberian railway. The analysis was based on the material obtained during the work with archival documents and drawings, as well as information obtained during field surveys of towns and cities on the railway line from Manchuria to Suifenhe and from Harbin to Dalian.
New Approach to Assessment of Granular Soil Shear Strength in Road Pavement
Authors: Moshenzhal A V , Zhdanova S M , Piotrovich A A
Published: March 2021

The article provides a new approach to assessment of granular soil shear strength in road pavements made of paving stones from the point of view of granular medium mechanics. The new approach consists in considering the features of normal and shear stress distribution in the multilayer structure of road surfaces made of artificial paving stones. The results of new approach make it possible to judge upon reasonability of considering the discrete structure of granular materials used in transport construction.
Slotted Resonator Section of the Silencer for Engineering Networks
Authors: Plitsyna O V , Rogova T N
Published: March 2021

The paper is devoted to noise reduction in engineering networks. It is indicated that the slotted silencer is promising for systems with large cross-section air ducts and flues. The technological and operational possibilities of including in the silencer the additional slotted section are noted. The additional two-slot section containing Helmholtz resonators is presented. Based on the calculations it was found that broadband noise reduction is provided by tuning the slotted resonators in a geometric progression with a denominator of 20.8. For a section with three resonators in each slot duct the following is shown: the resonator with the highest tuning frequency does not significantly effect the noise reduction of the other two resonators; the resonator with the highest tuning frequency can be placed between resonators with lower tuning frequencies. Compact placement of slotted resonators is proposed. The length of the device is shorted by 1.5 times while reducing the efficiency by 30%. The obtained data show that the silencer section composed from Helmholtz slotted resonators allows fulfilling silencer with additional noise reduction in the frequency range of 31.5-125 Hz and acceptable length.
Crack Resistance Tests of Samples from Polyethylene Pipes
Authors: Savvina A V , Danzanova E V
Published: March 2021

The article presents the test results of samples of welded joints of polyethylene pipes for crack resistance at various temperatures. It is shown that in the weld zone a decrease in the stress intensity factor to 27% is observed in comparison with the main material.
Architecture of Mass Dwelling in Russia and the Necessity for Structuring by Types of Property
Authors: Solodilova L A
Published: March 2021

The housing policy carried out in Russia in the 90s of the XX century led to the emergence of a new type of apartment building (multiple dwelling), which is essentially a kind of conglomerate of a municipal building with privatized flats. This practice of combining forms of ownership continues to this day, but if the old nine and five-story residential buildings despite their typical monotony nevertheless created a cozy and in many ways human environment, modern apartment buildings are faceless panel, very denselypopulated “catalogue boxes” with the same faceless forms of ownership, when the owners of flats and social and commercial tenants coexist in the same residential building. Such super-dense construction ensures a quick payback of investments to the builders, investors and developers, while simultaneously imposing on the consumer a close proximity of absolute strangers, including anonymous-aggressive activities of the management companies. The current situation of the construction of multi-storey and high-rise multiple dwellings leads to inefficient use of land, generating a truly depressed architecture of mass utilitarian consciousness. The dominance of large-scale apartment buildings must be stopped, while the forms of ownership and management must be disaggregated and differentiated. Mass development can and should be represented by more diverse volume-spatial solutions of build up with different heights and various types of filling (townhouses, blocked buildings, suburbias, etc.) taking into account new effective forms of private rental entrepreneurship and management.
Structural and Mechanical Preparation of Rolled Products for Fasteners
Authors: Pachurin G V , Mukhina M V , Gevorgyan G A
Published: March 2021

Based on the analysis of quality factors of calibrated rolled products, the structural and mechanical properties of steel 20Mn2Si for cold heading of hardware products are formed. The balance is established during the preparation of gauged bars to manufacture fasteners from it. To produce gauged bars with a diameter of 7.75 mm, a new technological flow is proposed using hot rolled products with a diameter of 8.5 mm. The proposed resource-saving technology for preparing rolled steel 20Mn2Si excludes spheroidize annealing, which reduces labor and energy costs, increases the environmental friendliness of production and operational reliability of fasteners. This eliminates the possibility of quenching cracks, the need for straightening products, the risk of thread defects and reduces the cost of manufacturing long bolts. This makes it possible to significantly reduce the process chain, reduce the cost of manufacturing fasteners and meet regulatory requirements for their mechanical properties.
Historical and Cultural Features of Russian Home Interior in the Context of Daily Routine
Authors: Plekhanova V A , Konopleva N A , Kucherenko A L
Published: March 2021

The article presents the analysis of the daily urban culture dynamics of the Russians and the interior design features of the urban Russian Home in the Soviet and post-Soviet periods. The interior, being the embodiment of the material and symbolic human environment represented by Home, is considered as a source of historical and cultural information about a person. The daily routine of a mainstream citizen was studied, reflecting the dynamics and contradictions of drastic historical changes and allowing to understand the cultural mentality at certain historical stages. In addition to photographic materials of the Russian housing interiors in the Soviet and post-Soviet periods, media resources data, such as: mass media publications, Internet sites materials, the article also contains the results of the authors’ interviews of the residents of the city of Vladivostok. The peculiar features of the Soviet and modern Russian mentality of the average urban resident were highlighted, the trends in the development of Russian urban daily routine were identified. The history of the mainstream Russian interior dating from 1917 up to 2018, represented by the examples of typical housing for its time, clearly reflects the complex path of transforming Russian daily routine from asceticism and sacrifice of the 1920s to the apparently prosperous everyday life of the 1980s and its modern inconsistency. A comparative analysis of the mainstream and elite Russian home interiors reveals significant differences in their quality and, accordingly, the incomparability of daily household culture of different social layers of Russian society. These contradictions in society can be traced throughout the post-revolutionary period and are increasing in modern Russia.
Vernacular Urban Areas as a Qualitative Factor in the Epidemic Situation (on the Example of Khabarovsk)
Authors: Garnaga A F , Nishchimnykh Iu A
Published: March 2021

The article examines the impact of the epidemic situation in the region on the interaction of society with the environment. Changes in the image of vernacular urban areas on the example of the city of Khabarovsk, as well as in the nature of preferences of citizens regarding places of residence, employment and recreation based on the results of sociological surveys in 2017-2019 and 2020 were revealed. Among the criteria for choosing places for recreation, Khabarovsk residents note the presence of large spaces and the degree of control by law enforcement agencies in different areas.

The assumptions and fears of respondents identified during the content analysis of the results of the 2020 survey that the most densely populated urban areas are most vulnerable to the spread of COVID-19 due to the number and density of the population are not confirmed at the meso-level: the largest percentage of infected people living in small settlements in the Khabarovsk territory.
On Possibility of Using Eurocode EN 1993 as Harmonized Standard
Authors: Absimetov V A , Saltanova E V
Published: March 2021

This article presents the content of Eurocode EN1993 and analyzes its application and the possibility of its use as a harmonized standard according to Federal Law No. 184 of 27.12.2002 On Technical Regulation.
The Influence of Phenolic Antioxidants on the Physical-Mechanical Properties of Hydrin T6000-Based Rubber under Climatic Factors and Hydrocarbon Environments
Authors: Haldeeva A R , Davydova M L , Sokolova M D , Fedorova A F
Published: March 2021

The effectiveness of the stabilizing effect of sterically hindered phenolic antioxidants of the pilot production of N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry (NIOCH SB RAS): CO-3, CO-4, and Stafen, were investigated under climatic conditions of the Republic of Sakha (Yakutia). Rubber samples containing phenolic antioxidants were aged in air, industrial oil of I-50A grade, and oil of the Talakanskoye field for 2 years. The physical-mechanical properties of rubbers based on Hydrin T6000 were studied and it has been established that phenolic antioxidants are more effective than the commercial 6PPD antioxidant.
Investigation of the Formation and Decomposition Processes of the Sredneviluisky GCF Natural Gas Hydrates in Dispersed Media
Authors: Kalacheva L P , Ivanova I K , Portnyagin A S , Solovieva S A , Egorov D R , Vasiliev A A , Chaynikova A A
Published: March 2021

In this paper the processes of formation and decomposition of natural gas hydrates in wet salted sand samples were studied. Investigations of phase transitions were performed on a specially assembled DTA installation. It is shown that with decrease of the humidity and increase of the salinity of media the degree of supercooling decreases, and the amount of the gas bound to hydrate decreases. It has been found that in comparison with the water-gas system in dispersed rocks there is a shift of thermobaric conditions of hydrate formation to the area of high pressures and low temperatures.
Mechanical Characteristics of Alloy Smelted from Ore of Kentik Ore Occurrence (Sakha Republic, Russia)
Authors: Danilov A D , Petrov P P , Stepanova K V , Sibiryakov M M
Published: March 2021

The present work evaluates the possibility of using local minerals to create foundry alloys used in conditions of low temperature. The feasibility of using iron ores from the Kentik ore occurrence in the Verkhnevilyuysky district of the Republic of Sakha (Yakutia) for the manufacture of new cold-resistant and high-strength steels was analyzed. The ore contains oxides of alkaline earth metals: MgO, CaO, Sr0 and BaO, the total content of that is 1.6%, that contributes to the process of deoxygenation of the melt during its cooling, and the deoxygenation product in the form of oxides and other chemical compounds based on Ca, Sr and Ba floats into slag. The content of rare earth yttrium oxide is 0.0058%. Alloy is smelted from Kentik enriched ore, samples for static tensile and impact toughness tests were machined in order to study the mechanical properties. The results of chemical analysis showed that the total content of rare earth oxides Eu2O3, Tb4O7, Dy2O3 and Er2O3 was 0.062%. Such concentration of rare-earth metals promotes the increase of strength properties, as well as the operational characteristics of the material. The fracture surface of impact toughness sample is investigated. Analogues for comparing the strength and plastic properties were given. Technical instructions for obtaining an experimental samples of a cold-resistant medium-carbon alloy with increased strength for castings using a charge of naturally alloyed ferroalloy have been formulated.
Liquid-Phase Sintering of Aluminum-Based Alloys with Additive of Products of Direct Reduction of Iron Ore
Authors: Tarasov P P , Pryadeznikov B Yu , Petrov P P , Stepanova K V , Emelianova Z V
Published: March 2021

The method of direct reduction by hydrogen for iron ores of the Lensk ore field were considered in the work, the particle size, bulk density, a corner of a natural slope of products of grind and reduction of ore were defined, morphological researches, the X-ray spectral microanalysis of particles of the reduced ore material were conducted. Aluminum-based sintered powder materials with the addition of the recovered ore are obtained. It is established that temperature increase of sintering leads to reduction of residual porosity of the compacts. Samples with additive of the reduced ore keep the correct geometrical form practically in all studied ranges of changes of temperature of sintering and content of additive. Measurement of hardness of the sintered composite aluminum-based alloys with additive of powders of the reduced demonstrate that higher values of hardness are observed at structures from 14.4 and 18.7 weight % of additive of the reduced ore.
Deformation Dependences of the Power and Environmental Resistance of Reinforced Concrete Structures Under Accidental Actions
Authors: Kolchunov V I , Androsova N B
Published: March 2021

The problem of determining the parameters of the stress-strain state of reinforced concrete bending elements with the simultaneous manifestation of force loading and environmental impact under static-dynamic loading conditions is considered. Dependences of the deformation model were constructed using the integral modulus of deformations by V M Bondarenko. The parameters of the diagrams of the static-dynamic deformation of the section of corroded concrete under the action of a static and short-term dynamic load are determined on the basis of a rheological two-element model of concrete deformation of the theory of plasticity by G A Genieva. At the same time, the hypothesis was accepted that the relationship between stresses and strains in corrosion damaged concrete under its short-term loading is affinity-like to similar dependencies of undamaged concrete, and the ultimate deformations of concrete under static and static-dynamic loading modes are equal to each other. A methodology and an algorithm for the computational analysis of the strength and environmental resistance of reinforced concrete structures at all stages of static-dynamic deformation are proposed.
Numerical Modeling of Solutions of the Applied Problems for the Poisson’s Equation
Authors: Kazakova A O , Mikishanina E A
Published: March 2021

Many problems of continuum physics, applied physics, electrostatics, heat engineering, and structural mechanics are described by boundary value problems for the Poisson equation. The article is devoted to the construction of a numerical algorithm for solving plane boundary value problems for the Poisson equation. The algorithm is based on the transition to a polyharmonic equation, which is solved by the method of linear boundary elements. We consider two boundary value problems with different boundary conditions: Dirichlet boundary conditions and Neumann boundary conditions. To construct a numerical solution using the linear boundary element method, the boundary of the area is replaced by an inscribed polygon. The boundary conditions are satisfied at the middle (control) points of the elements. A polyharmonic equation is reduced to a system of linear integral equations, which can be reduced to a system of linear algebraic equations. Test numerical examples confirming the effectiveness of the proposed algorithm are given.
Analysis and Forecasting of Housing Prices Considering Particulars of Vladivostok Real Estate Market
Authors: Bekker T , Buzina M , Tupikova O
Published: March 2021

The present article is dedicated to the problem of price forecasting with due consideration for particulars of local real estate market. Economic and geopolitical features of Vladivostok determine the particulars of real estate market, and the high level of housing prices was duly considered. A brief overview of approaches and methods used for forecasting of prices for residential property was performed. A special monitoring study of the real estate market was carried out; the general trends of price changing were identified, and time trend was evaluated. Methodological approach has been substantiated, and the model of forecased housing prices has been developed with due consideration for the particulars of real estate market at the municipal level. The forecast of for residential property price changes was carried out with reference to the basic scenario of the socio-economic development of Vladivostok up to 2025. Practical application of the proposed model would allow investors and developers to evaluate the effective demand in a more objective manner, and thereby to provide adequate offers in Vladivostok primary housing market; and would allow the municipal government to develop and undertake specific measures of state regulation and support.
Development of a Passive System Model of Human Heat Exchange with the Environment
Authors: Rodicheva M V , Abramov A V , Gneusheva E M
Published: March 2021

When modeling human heat exchange, a mathematical description of the processes of generation, heat distribution in the body, and heat transfer to the environment has been proposed. A numerical implementation of the model has been obtained. The solutions have been verified with experimental data in comfortable conditions. It has been established that the model can be used in solving the problem of ensuring the thermal comfort of a person when designing residential and public spaces.
Speech as Noise Interference During a Mass Event
Authors: Shubin I L , Antonov A I , Ledenev V I , Yarovaya T S
Published: March 2021

Participants of mass events are noise sources for surrounding area and perception of information. To rate the intelligibility of the signals of sound amplification systems and to design the instruments of the noise insolation, the methods of calculating the propagation of sound energy from distributed noise sources such as people are developed. Methods take into account features of the emission of sound energy by such sources. The features include time-varying acoustic and spatial characteristics of noise sources. They are associated with the random nature of the position and direction of noise emission from event visitors. The method of calculating the energy parameters of direct sound depends on the parameters of the noise source. The low density of people location implies to use the method of mathematical modeling, including the random position, orientation and duration of speech of noise sources. The increase in the mass character of events and the increase in the density of point noise sources are rational to use the integral calculation method. The numerical solution of the integral equation is implemented in a computer program and used for calculating the noise from fans of a football match at the stadium and adjacent urban development. The methods for calculating direct sound from distributed sources in the form of a circle, a circular sector and a rectangle are suggested on the basis of an analytical solution of integral expressions. Comparison of calculation results by developed methods and experimental data is performed. The discrepancy between the results in the most difficult situations doesn’t exceed ± 3 dB.
Ecological Reclamation of Lawn Coverings in Disturbed Areas
Authors: Avdeeva E , Zheltobryukhova E
Published: March 2021

Today, the problem of reclamation of landfills for solid domestic waste is urgent, which is a complex of works aimed at restoring the economic value and productivity of the restored territories. Ecological reclamation is a set of measures for the ecological and economic restoration of lands, the fertility of which has been disturbed as a result of human activity. The purpose of reclamation is to improve environmental conditions, restore the productivity of disturbed lands. In the city of Krasnoyarsk and its suburbs, the peculiarities of weather conditions are traced, affecting the growth and development of lawn coverings. In the course of the study of the correspondence of the parameters of climatic environmental factors to the criteria for the growth of high-quality lawn coverings for the reclamation of landfills, it was established that the humidity regime is the limiting factor. On the basis of this, we have developed types of trash mixtures for reclamation of disturbed areas. When arranging lawn coverings in the city of Krasnoyarsk and its suburban area, it is necessary to focus on the natural conditions of lawn moistening and adopt care technologies adequate to the prevailing conditions. the biological properties presented in these herbal mixtures of herbs meet the requirements that are imposed on the reclamation of disturbed areas and their care. They have high winter hardiness and drought resistance, resist pathogens, pests and weeds.
Estimation of the Survival Rate of Pinus Sylvestris Urban Landscaping Facilities in the City of Krasnoyarsk
Authors: Avdeeva E , Panov A
Published: March 2021

Scotch pine takes an increasing place in urban greening. Its high decorative qualities, especially in winter, undemanding to soil conditions, rapidity of growth, winter hardiness, high sanitary and hygienic and environmental protection properties contribute to the greatest distribution. It has been established that when creating green spaces at city greening objects, it is necessary to take into account the dynamics of plant survival. The study of the survival rate of Scots pine according to the reaction of the growth of lateral branches showed that the main decrease in growth after transplantation occurs in the second year, the restoration of growth occurs after 7-8 years. The survival rate of plants largely depends on the state of the urban environment and the technology after planting care for plantings, especially in the first and second years after transplanting. At the same time, when creating green spaces, it is also necessary to comply with the recommendations of the “Building codes and regulations" in relation to the minimum distances to buildings, structures, footpaths and driveways, as well as the schedule of work to create a landscaping facility.
The Current State of the Landscaping System of a Large Industrial Center (for Example, the City of Krasnoyarsk)
Authors: Avdeeva E , Kuhar I , Chernikova K
Published: March 2021

An important indicator of the state of comfort of urbanized territories is the provision of city residents with green areas. Green areas of common use include plantings of city-wide and district parks, inter-quarter gardens, squares, boulevards and embankments. Currently Krasnoyarsk is one of the largest centers in Eastern Siberia. Historical and new areas of Krasnoyarsk differ significantly from each other by the nature of landscaping. Protective zones located between residential and industrial areas along highways and railways should make a great contribution to the general greening system of the city. Analysis of the dendrological composition and distribution of species in plantings of the city shows that the main composition of plantations is represented by a limited number of species, among which balsam poplar and ash-leaved maple are unpromising species for plantings of general and limited use. The list of woody plants recommended for landscaping the city, tested in arboretums, plantations of the central part of the city and Akademgorodok, is represented by a fairly large variety, including both local species and species of various botanical and geographical regions. At the same time, an increase in the share of the main forest-forming species in the greening of urban areas, such as drooping birch, Siberian larch, Siberian spruce, their high decorative qualities will allow to more fully solve the problem of forming the individual appearance of a Siberian city. The combination of these rocks with the natural components of the landscape - relief, bodies of water and artificial elements (buildings, engineering structures) - will increase the artistic expression of urban development.
Noise Propagation in Urban Area from Chimneys of Thermal Power Plants
Authors: Gusev V , Ledenev V , Antonov A , Matveeva I
Published: March 2021

Large energy facilities are noise sources of the adjacent to them urban buildings. In case of noise propagation from pipes, the assessment of the noise mode of the urban building area is a complex scientific-practical problem of building physics. The solution of the problem is carried out consistently in two stages. At first, the noise distribution in channels from ventilator to the mouth of the pipe is determined. Proposed calculation model takes into account sizes and shape of channel and pipe, noise insulation properties of the walls and the mirrored-diffuse nature of the sound reflection from the fences. For metal ducts, 95% of reflected sound energy is mirrored, and other 5% of it is diffusely. The distribution of emitted by pipe sound energy within urban building is found at the next stage. A new method is suggested for solution of this problem. It is based on received analytical dependence of the sound energy directivity factor from the mouth of pipe and integration of its diffraction. To implement the method a computer program is developed. The program makes it possible to assess the propagation of noise inside ducts and in an open space from the mouth of the pipe to various sites of buildings. To realize the method, an example of calculation of noise emitted by the chimney of a steam boiler of a thermal power plant in Moscow is given. The example shows the potential of suggested calculation model and its computer realization for the noise mode assessment of the adjacent to energy facilities urban buildings.
High-strength Titanium Bolts Processing for the Manufacture of Fasteners
Authors: Afonina M B , Gurtovaya G V , Ruchina N V
Published: March 2021

This work is devoted to the development of a heat treatment technology in the manufacture process of cold deformed VT16 and VT35 fasteners with the diameter of 16mm or more. This work also investigated the influence of various types of lubricants on the friction coefficient at the “metal-tool” interface during cold deformation operations.
Singularity Point of the Russian Arctic
Authors: Sarvut T O , Tkachev V N
Published: March 2021

In the area of Yamal and Taimyr in the 20th century, a large industrial center developed. At the same time, the Eastern regions of the Arctic and Siberia remained outside the country’s integrated economic system. Only gold and diamond mines work here.

In the 90s, the organizational structure of economic relations disintegrates, and the region finally turns into a raw material appendage of the country — and this is a large part of its territory. Currently, falling interest of Western countries to Russian energy; the tangle of problems, the indicator of which was the Arctic, has generated the second crisis (a sharp in-depth “breakdown" of internal and external communications for pandemic COVID-19), impending disaster, as the natural ending of the impasse singularities, completes the life cycle of any system [1]. The article collects and analyzes information on the current situation in the production of energy resources, the state of transport, the demography of the region, and assesses prospects for its further development and restoration of the integrated mechanisms of the economy.
Modeling of Seismic Resistance of Spatial Larg-span Unique Structures in the Operational Stage
Authors: Razzakov S R
Published: March 2021

The paper presents the results of the research of the stress-strain state of long-span unique spatial and shell constructions, subjected to long-term static and dynamic effects, and performed by using experimental methods of physical modeling obtained on experimental models and full-scale structures.

To ensure the operational safety of buildings and structures, the change in the structural proper-ties of materials from unfavorable climatic conditions of long-term beyond design-basis static loadings dynamic effects of high intensity compliance of bearing diagrams and the presence of local damage to structures was investigated. The evolution of the dynamic parameters of spa-tial and shell constructions during operation is investigated.
Problems of Organizing Year-Round Urban Pedestrian Spaces in Vladivostok
Authors: Babenko A , Gavrilov A , Ogochonova E
Published: March 2021

Vladivostok is notable with significant limitations in arranging pedestrian spaces in the traditional way, namely along highways. Therefore, the most essential task is to develop those pedestrian spaces that connect areas separated by a significant difference in terrain, highways, and railways along the shortest distance. The article discusses the experience of national and foreign design of pedestrian spaces formed independently of city highways and assuring a comfortable traveling for pedestrians under any weather conditions. Studying the experience of using technical means and mechanisms will allow outlining the main ways of the architectural and spatial arrangement of year-round urban pedestrian spaces in the conditions of hostile terrain and monsoon climate.
The Route Selection Method for Natural Gas Pipelines
Authors: Medvedeva O N , Chilikin A Yu
Published: March 2021

The efficient functioning of gas distribution systems requires a feasibility study of rational gas transport circuit solutions and the choice of optimal parameters. The choice of gas pipeline routing has a significant impact on the functioning of the gas distribution system. The optimal solution to this issue will significantly reduce the cost of construction and operation of the gas supply system. This study formulates some provisions for the design of inter-settlement (intercity) gas distribution systems, designed to improve the efficiency of their operation. In this study, the choice of the optimal variant of the gas pipeline route is reduced to identifying such a position of the main pipeline, at which the costs of building and operating the system will be minimal. This task can be solved both analytically and supplemented by graphical methods. The possibility of using the least squares method and Newton’s method for solving problems in the field of gas supply to consumers is shown.
Improving Design of an Energy-Efficient Lighting System Based on Mirrored Hollow Tubular Light Guides According to the Criterion of Its Soundproofing
Authors: Pleshkov S , Bracale Gennaro , Kuznetsov A
Published: March 2021

This scientific work presents results of energy-efficient lighting systems based on mirrored hollow tubular light guides tests when sound waves of various intensities of low-frequency, mid-frequency and high-frequency ranges pass through them. In addition, technological changes in design of natural lighting systems, which were carried out in order to increase their vibration resistance and noise absorption are shown.

Studies have shown high reliability of lighting systems in terms of their soundproofing, especially in mid-frequency and high-frequency ranges, which can significantly reduce harmful effects of noise on human body, leading to fatigue, depletion of brain cells, insomnia, decrease in overall working capacity and human productivity. Conclusions of this work make it possible to further optimize the future prospect of widespread use of energy-efficient lighting systems based on mirrored hollow tubular light guides in construction of residential, administrative and industrial premises.
Application of Calculation Softs to Perform Verification Calculations during the Survey of Monolithic Reinforced Concrete Buildings
Authors: Kolleganov A V , Kolleganov N A , Levshekov S S
Published: March 2021

When performing verification calculations during the survey of building structures, the use of calculation software is limited by the standard algorithm, which does not always allow taking into account the impact of certain pathologies and damages on the bearing capacity and stability of structural elements and objects as a whole. The article offers a variant of using the software package “Lira 9.6” to assess the load-bearing capacity of a building with a monolithic reinforced concrete frame, taking into account the most characteristic pathologies for objects of this type.
Impact of Glass Window to Heat Load in Office Building in Different Climates
Authors: Van Luong Pham , Malyavina E G , Malikova O Y
Published: March 2021

The process of urbanization with the social and economic development in countries, the large and very large building are increasingly serving for administrative, office, commercial, and residential. Nowadays, buildings oriented to meet the aesthetic requirements, also the convenience and fast construction, the covering structure of these buildings is mostly glass. The experiment of heating and cooling loads of reference room has been conducted through the Japanese program for PC Heat load DACCS HkGS (Daikin) with embedded climate data. The raising of thermal load in reference room gets more impact from the values of WWR than the types of glass. In details, the cooling load of reference room increases 35% in Moscow and 40% in Hanoi when raising the WWR. The results show that, the window is a main impact of thermal load of office building with each typical climate. For the window characteristics in the building, the WWR take more impact to the thermal load than the type of glass. Therefore, the using of window into the facade is a major challenger to in the design of high-rise building when balance the aesthetics and energy consumption in the building.
HAZ Structure Formation of Carbonaceous Steel at Impulse Welding
Authors: Moskvitina L V
Published: March 2021

For increase of mining technique capacity at production and restoration wear resistant facings are widely applied. In this work, impacts of impulse welding of an intermediate layer on structural factors and facture toughness of wear resistant surfacing are studied. It, is established, that applying an intermediate layer with periodic impulse «teeth» forms a heterogeneous texture of intermediate layer, causing higher fracture toughness of wear resistant surfacing. It, is shown that defects made by current impulse have promoted a fine-grained structure of HAZ facing and grain-boundary allocation of grainy pearlite.
Biodestruction of Buildings and Constructions and Improvement of Their Longevity and Environmental Friendliness at the Basis of Application of Bio-Resistant Materials
Authors: Svetlov D A , Piksaykina A A , Vildyaeva M V , Piksaykin N V
Published: March 2021

The article discusses the problem of negative biological effects in buildings and structures. The analysis of microflora released from damaged objects is given. Risk groups for the development of diseases caused by microbial biodestructors that are potentially dangerous to humans are given. The biodegradation of residential and public buildings causes a decrease in the level of people’s health, and their disability occurs due to the deterioration of the urban environment. Microbes contained in building structures, in finishing and protective materials, can settle on the skin, enter the bloodstream through the lungs, and also with food into the human body. A number of pathologies that are difficult to cure and life-threatening have arisen recently due to a sharp drop in human immune reactivity.

The object of the study was cement composites, which include port-lance cement, a mixing fluid, a filler, a fine aggregate, and additionally silicon organic compounds. The hypothesis is that the latter in the form of aryl - (aryloxy) silanes, due to their hydrolysis in a humid environment, can become potent biocidal components.

During the research, generally accepted physical-mechanical and biological methods were used. To assess biostability, samples of cement composites were infected with a test by microorganisms from the following set of mycelial fungi: Aspergillus niger van Tieghem, Aspergillus terreus Thom, Aspergillus oryzae (Ahlburg) Cohn, Chaetomium globosum Kunze, Paecilomyces varioti Bainierulicomillumium Penicillium peniciumium Penicomium Thiumllium Penicillium peniciumium, Trichoderma viride Pers. ex Fr.

Tests have shown that silicon organic additives contribute to a significant increase in the biostability and strength of cement composites. Studies have revealed the presence of a correlation of the fungus resistance of building composites with the addition of silanes and their hydraulic activity.
Algorithm for Design of Steel Fiber Concrete Structures
Authors: Talantova K V
Published: March 2021

It is shown that the widespread use of structures made from such building composites as steel fiber concrete (SFC) is constrained due to the lack in regulatory documents of the necessary information on the choice of initial data, possible options for fiber reinforcement and principles of their rational use, features of their calculation and design, as well as the data with SFC properties in accordance with the operational requirements for such structures. During a long period of time since the idea of concrete reinforcement with steel fiber (“iron hair”) emerged at the end of the XIX and the beginning of the XX century, numerous studies have been performed by Russian and foreign scientists, which became the basis for the further development and improvement of building structures with fiber reinforcement. The algorithm for the design of SFC-based structures has been presented, including the peculiarities of the composite nature of the material.
On the Issue of Designing a Suspended Span
Authors: Kuzmenko O A , Chemodurov V T
Published: March 2021

As is known, suspension bridges are much lighter in their total weight than those of other designs. This is their indisputable advantage. It is no coincidence that these bridges are widely used in practice. However, along with the indisputable advantages, they are quite sensitive to wind loads generating bending and torsional oscillations of spans at certain transverse air velocities. If the bridge drag at a transverse airflow can be easily reduced by designing streamlined surfaces, then the bridge span surface stability under the action of bending and torsion forces can only be ensured by properly choosing its cross-sectional profile providing the required inertia moment as a required component of its stiffness.
The Methods of Producing Decorative Samples Using the “Hot Enamel” Technology
Authors: Aslanova E S , Moiseeva E S
Published: March 2021

The article presents the methods of creating decor samples using the technology of hot enamel of a certain color palette based on selected (suitable) materials. These methods allow expanding the artistic and aesthetic ways of obtaining works of applied art and design objects on the basis of color and interior design principles. Taking into account the functional requirements for the design of banquet halls, the interior space was modeled in the program ArchiCad 16 with implementation of decorative samples of hot enamel. The authors developed decorative samples (triptych composition) for decoration the interior space of the institution banquet hall.