bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Analysis of Resource Evaluation Methods on the Example of Welded Connections of Offshore Oil and Gas Facilities Background
Authors: Starokon I
Published: March 2021

The world is actively developing offshore oil and gas fields. Various hydraulic structures are actively used for offshore production. Offshore fixed platforms have become widespread among these hydraulic structures. During operation, these platforms are subjected to various loads and influences, which include wind-wave and ice loads, temperature and vibration-vibrational effects, etc. causing their gradual destruction. Therefore, the determination of the values of the duration of the safe operation of welded joints of offshore platforms from the moment of their operation until the onset of their destruction, which is also called a resource, is a key requirement for ensuring the safe operation of these structures.
Mechanisms of Increase in Organizational and Technology Reliability at Management of Innovative Construction Production
Authors: Belousov V E , Stroganova Y S , Tutarishev Z B
Published: March 2021

In article the problem of distribution of technology dependent works on contractors is considered during creation of the innovation production due to capital investments in means of mechanization and automation of construction production that allows to construct such schedule by means of which time of accomplishment of the corresponding amount of works is minimized by the set great number of contractors and the optimum sequence of their accomplishment is defined. At the same time job sharing on contractors with use of methods of research of stream — Dijkstra’s algorithms is considered optimum. The relevance of creation of this model is defined by need of rational use of human resources. It is possible to carry possibility of process description of construction to advantages of model at the same time of several objects the innovation means of production with increase in parameters of organizational and technology reliability.
Compositional Features of Modern Urban Landscape Spaces
Authors: Dormidontova V
Published: March 2021

The article is devoted to the studying of the compositional solution and the analysis of the creation of parks characterized by linear-axial composition. The historical roots of linear spaces are noted. The history and principles of creating Promenade Plantee in Paris, High Line Park in New York, the Tide in London, the Cheonggyecheon Park in Seoul are outlined. On the example of these landscape objects the compositional analysis is fulfilled. As a result, the basic principles of modern linear-axial spaces compositional construction are identified. Distinctions from historical analogues are highlighted. It is concluded that the linear type of space has flexibility and susceptibility to new functions, the ability to transform in modern conditions into an actual, urban planning justified and popular model of urban public space.
Analysis of Stability Criteria of Retaining Structure Slope and Reservoir Banks with Deformed Reinforced Concrete Anchorage
Authors: Karpushko M O , Bartolomei I L , Karpushko E N
Published: March 2021

The conditions of the impact of wind waves on the soil upland slopes of retaining structures and natural banks, which are fastened in the form of reinforced concrete slabs of the covering with deformations, are considered. The results of the analysis of field examinations of the state of reinforced concrete fastenings of slopes and banks of artificial water bodies under the influence of wind waves are presented. A criterion is proposed for assessing the stability of soil slopes and coastal slopes with reinforced concrete fasteners with a broken structure, and the conditions for its applicability are determined.
Stochastic Models of Project Time Management
Authors: Barkalov S A , Kurochka P N , Kalinina N Yu
Published: March 2021

The importance of the project time management process is noted. It is shown that the main factor affecting the temporal characteristics of the project is the composition of the project team. The process of forming a project team is considered taking into account the fact that the main characteristics of the performers, in particular their labor productivity, will be stochastic values. We consider the design process of the organization of the project, which is reduced to a stochastic programming problem, which reduces to a deterministic problem and can be solved by numerical methods. For a random variable with a normal distribution law, the problem statement is given in an analytical form. Concrete recommendations are given for determining the distribution law and solving the problems of managing construction production.
Cogeneration Plant Optimization
Authors: Mitiukov N W , Spiridonov S V , Samigullina G Z
Published: March 2021

As the analysis of publications on cogeneration shows, most authors present it as a way to increase the efficiency of existing power generation plants by utilizing the generated heat. It is shown in the work that cogeneration is a complex system that allows maneuvering the proportion between the received thermal and electrical energy. In this regard, it seems promising to develop a cogeneration system in which this proportion could be regulated. There have not been such systems in the published patents yet. Regulation of the proportion between heat and electricity can be carried out in accordance with the changing tariffs for these two types of energy, as well as depending on production tasks. Existing cogeneration systems are usually adaptations of existing power plants optimized for optimal electrical energy consumption. Cogeneration systems should be optimized for the maximum total consumption of heat and electricity at a minimum cost. Apparently, in the conditions of existing calculation methods, this problem has not been solved yet. Therefore, the optimal values for cogeneration should be sought outside the currently accepted design parameters and operating modes of power plants.
The Formation of Bimetallic Materials by the Electron-Beam Additive Manufacturing
Authors: Chumaevskii A V , Kalashnikova T A , Panfilov A O , Gusarova A V , Knyazhev E O , Kalashnikov K N , Nikonov S Yu
Published: March 2021

The structure of Cu-Ni system polymetallic materials samples produced by the electron-beam additive technology has been studied. Two types of samples were manufactured: with a smooth and sharp gradient. The separation effect of the nickel alloy from the copper substrate was found in a number of experiments. More intensive heating of the substrate before the first layer was applied, which resulted in the formation of a smoother transition zone from copper to nickel alloy, but did not solve the problem due to uncontrolled diffusion in the molten bath. The use of the multi-wire gradient printing with simultaneous feeding of two filaments allowed to form a smoother transition in the boundary zone.
Study of Influence of Climatic Factors of North on Properties of Polymer Composite Textolites
Authors: Lukachevskaya I G , Lebedev M P , Kychkin A K , Struchkov N F
Published: March 2021

Influence of a very cold climate on properties of basalt and glass textolites made by an infusion method by successively laying a reinforcing material on a mold and impregnating with a three-component epoxy binder is studied. Full-scale climatic tests at an open proving ground during 2 years led to a decrease of ultimate tensile strength by 14% and an increase of ultimate bending strength by 18% for the basalt textolite, the increase of the ultimate tensile strength by 9% and the ultimate bending strength by 22% for the glass textolite. Conducted studies of changes of surface relief showed insignificant variations of average amplitude of inhomogeneities up to 0.4 μm for the basalt textolite and up to 4 μm for the glass textolite. The conducted studies of these materials demonstrated their resistance to the climatic influences in a region of the very cold climates, which is confirmed by a high level of preservation of their strength parameters.
Assessment of the Impact of Air Pollution on Plants in the City of Krasnoyarsk
Authors: Avdeeva E V , Izvekov A A
Published: March 2021

The background state of the environment of urban areas is formed due to the combined effects of industrial and transport emissions, as well as as a result of their secondary interaction. The concentration of emissions depends on landscape, urban planning and weather conditions. The environmental background affects the changes in individual landscape elements.

However, processes occur in separate points of the city that additionally form or disperse pollutants, as a result of which local situations develop at the micro-territorial level, which differ from the background state of the environment. In this case, the local situation may differ both in the positive and in the negative direction.

More comfortable conditions develop in areas where planning decisions correspond to microclimatic and orographic situations, in large landscaped areas, near water bodies, etc. Local conditions that increase the level of environmental pollution are formed by situations that depend on territorial distribution, intensity of occurrence, time of occurrence and duration adverse effects. Therefore, when designing landscaping objects and choosing technology for planting care, it is necessary to take into account the conditions for their growth at the local level. At the same time, the assessment of phytoecological conditions should include landscape, urban, syn, and outecological aspects, which determine the growth and development of individual plants and the state of plantings as a whole [1].
The Main Regularities of Changes in the Composition and Properties of Saline and Non-Saline Clayey Sediments with Diffuse Leaching
Authors: Shekochihina E V , Kalinovsky S A , Stepanova E A
Published: March 2021

The paper contains the results of their own research on the problem of diffusion leaching of unsalted sarmatian clays and analysis of data from other authors who study this problem on samples of saline clay rocks. Changes in the physical and mechanical characteristics of clay rocks, which may be the bases of buildings and structures, during their diffuse leaching are considered. It is concluded that unsalted sarmatian clays that do not have fine pyrite in their composition and saline quaternary clay rocks of various genesis are less resistant to flooding than saline marine clays.
Intelligent Transportation Strategy to Promote Sustainable Urban Transport Tools (Case Study of the City of Najaf - the Republic of Iraq)
Authors: Al-Shebillawy E J , Stetsenko S E , Al-Mossawy B A
Published: March 2021

Upgrading the level of transportation and its services is an urgent necessity, especially since the development of cities is measured by the most important indicators of development in the urban field, and among the most important of these indicators is what is known as smart transport, as it means smart transportation using modern technologies of communication and information technology to face many challenges in various areas of transportation, And the elimination of all obstacles that stand in the way towards achieving a smart urban environment in light of the lack of a clear urban policy to benefit from smart transportation applications and the absence of strong management of the concerned authorities, as the smart transportation strategy in the holy city of Najaf aims to improve many indicators of mobility and traffic movement in general by the year 2030, as it includes the introduction of smart transportation systems as one of the ideal solutions to traffic problems. Part of this strategy includes establishing an express metro network along the main roads of the city and down to the city centre, Also, following this strategy leads to raising the level of traffic safety, reducing carbon emissions, reducing the demand for parking, reducing the cost of transportation, as well as reducing the time of arrival to the city centre and the removal of traffic jams from the vital city centre.
Comparison of Energy Efficient Air-Conditioning Systems
Authors: Khasikov S , Thurston U
Published: March 2021

The purpose of this paper is to provide a comparison of energy-efficient air-conditioning systems in an office building in a warm, tropical climate. Miami, Florida was the city used for the demonstration. A typical office building from the coast of Miami was selected and to do a proper assessment of the energy efficiency of different air-conditioning units, we designed the shell of the office building and simulated the energy usage in eQUEST software. The software then generated the results for examining the energy usage of each air-conditioning systems and allowed us to determine which would be the most energy efficient based on the results received.
Dynamic Analysis of Ballastless Rail Superstructure on a Track Switch
Authors: Smirnov V A
Published: March 2021

Proposed article presents design procedure and dynamic analysis of a ballastless rail superstructure used to decrease the vibration from the moving trains in underground tunnels located adjacent to residential and commercial buildings. The rail superstructure features a floating slab consisting of a reinforced concrete (RC) slab with direct fixation of railway fastenings and elastomeric bearings, that transfer the loads from the floating slab to the tunnel casing. A track switch is mounted on a FST. The aim of the design procedure is to select required static and dynamic properties of elastomeric bearings made of cellurar polyurethane as well as the amount of reinforcement taking into account deteriorating properties of both materials. FE-model created in MSC Patran/Nastran software package is used to get an insight on stress-strain state of this floating slab track structure. Proposed FE-model consists of switch track with direct fixation railway fastenings, RC track slab, elastomeric supports. Static analysis is performed to get the upper-track structure elements’ deflections as well as stress-strain state of RC slab under moving trains. Dynamic interaction of the ballastless rail superstructure is investigated using derived from FE-analysis transfer-function between the superstructure and tunnel invert. Vibration isolation efficiency under excitation frequencies of moving trains over different speed is obtained from the transfer function.
Selection of Outdoor Climate Parameters for Designing of Ventilation and Air Conditioning Systems
Authors: Strongin A S , Vorontsov V A , Kuznetsov K A
Published: March 2021

The correct selection of the outdoor climate parameters for the design of ventilation and air conditioning systems in buildings allows saving initial costs and reducing energy consumption during operation. The article presents a method of statistical processing of long-term data of measurements of meteorological parameters and the results of calculations for various regions of Russian Federation. The required outdoor climate parameters such as air temperature, specific enthalpy and absolute moisture content, are presented in the form of tables, BIN diagrams and a climate map of a city.
Dynamic Loading of the Rod at a Sudden Change of Elastic Foundation Structure
Authors: Poddubny A A , Gordon V B
Published: March 2021

The mathematical model of dynamic process in the loaded constant evenly distributed load of structurally nonlinear system “beam - two-parameter foundation" is constructed, arising as a result of sudden change of physical and mechanical properties of the foundation, leading to zeroing of its shear rigidity. The solving of the static bending problem of a hinged beam fixed at the ends of the beam, supported by (если физически на него опирается, если нет, тогда operated) the Pasternak foundation, serves as an initial condition of the problem about the forced vibrations of the beam on the Winkler foundation, which occurred after a sudden formation of the defect. The solutions of static and dynamic problems are built using the method of initial parameters with the involvement of vectors of beam cross-sections states and matrixes of influence of initial parameters on the state of arbitrary cross-sections. To analyze forced vibrations, the decomposition of load and deflection of the initial static state into rows according to the forms of natural vibrations of the new state is applied.
Areas of Probable Air Pollution in Mountains and Valleys
Authors: Shukurov I S , Marakulina S P
Published: March 2021

Many cities of the world are located in river valleys or are associated with mountains. The article presents the characteristic landscape positions of many cities in the world. Among them is very important to study the wind regime, which is located in the conditions of the basin. In these cities, general pollution and deterioration of the microclimatic regime of the atmosphere are observed during periods of windless weather, and especially during inversions. It occurs either due to the gradual accumulation of harmful impurities of road transport under adverse meteorological conditions. The contribution of vehicles to the total air pollution is up to 80%. Currently, their composition of vehicle exhaust gases contains more than 200 different substances. With 95 … 99% of emissions t represent an aerosol of complex composition, depending on the engine operating condition and the composition of the mixture. The composition of the atmosphere of cities should meet the established standards for the content of the main components of air and harmful impurities (dust, gases), taking into account existing state standards. Biomedical requirements for the composition of air in cities are determined by the maximum permissible concentrations (MAC). However, the content of toxic substances in the air at the level of the MPC cannot be considered as the optimal composition of the air environment. In cities located in the depressions, deterioration of air exchange conditions is observed, which is associated both with a drop in wind flow activity and a decrease in the intensity of solar insolation per unit area of exposed surfaces of the slopes. In the work to improve the wind mode, the base for establishing the main stages for regulation is set to be direct; recycling; and combined i-recirculation direct-flow, as well as direct-flow-recirculation schemes of natural ventilation. The formulas for determining the criterion for evaluating the effectiveness of ventilation are given. We used computer modeling technologies that significantly simplify the analysis of the wind regime and reduce the time spent on research, the purpose of which was to compare the results of experiments in a wind tunnel with the data of virtual studies of the wind flow around natural wind patterns in a wind tunnel with the use of SolidWorks 2015, with the addition of Flow Simulation.
Investigation of Air Dust and Fine Dust of an Urbanizing Environment
Authors: Thi An Phan , Shukurov I S , Van Luong Pham , Shukurova L I
Published: March 2021

Hanoi is the capital of the Socialist Republic of Vietnam. The city is developing according to the following scheme: there is a central region and surrounded by satellites (5 cities), which are connected to the center using a transport system such as rail, road, river roads, etc. A high pace of economic development will cause environmental problems. Air quality is deteriorating due to an increase in population, means of personal transport, industrial and other sources of emissions; and all this has a strong impact on human health and the environment. According to WHO estimates, Hanoi is the city with the highest levels of dust pollution with annual average values of PM10 and PM2.5, which are both high at 73.5 μg/m3 and 47,45 μg/m3. This conference paper studies the effects of environmental pollution caused by fine dust PM2.5 during urbanization in the city of Hanoi, and some urban planning solutions to reduce pollution caused by fine dust PM2.5.
Expert Opportunities for Regulating Communication in the Network Management of Construction Production
Authors: Osadchaya N , Kliuchnikova O , Murugova E
Published: March 2021

The article deals with the problematic aspects of the examination of construction objects from the perspective of effective communication. The problem is considered from the perspective of an interdisciplinary scientific approach. It is proposed to use information and intelligent environments in the construction industry-software systems for BIM 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, we show the possibility of creating institutional forms of innovation in the management of construction production using software packages for BIM modeling and production management.
Calculation and Construction of Combined Steel Concrete Beams
Authors: Veselov V , Egorov V , Abu-Khasan Makhmud
Published: March 2021

The article considers combined steel-concrete beams of floors and coverings, crane structures, bridge spans, and analyzes methods for evaluating the stress-strain state of a steel-concrete beam. A number of steel-concrete beam designs protected by utility model and invention patents are proposed for use. A method for calculating a steel-concrete beam of a closed contour of any shape filled inside with concrete has been developed.
Influence of 3D-Printing Parameters on Bimetallic Products Manufacturing Process of Cu-Fe System
Authors: Osipovich K S , Gurianov D A , Chumaevsky A V
Published: March 2021

The article is devoted to selection of optimal parameters for manufacturing defect-free high quality products. Bimetallic samples with different parameters of modes were printed by the method of electron beam wire-feed additive technology. Materials of stainless steel 304 and copper C11000 selected for printing have different physical properties. Based on macrostructural research, the paper presents various external defects, which were formed in different modes of production. The study showed the effect of external defects on the formation of internal defects in experimental samples. It was noted that in addition to the basic parameters of the manufacturing process, such as beam power and wire feed rate, geometric parameters such as electron beam sweep diameter and substrate thickness play a major role. The article presents macrostructural studies of bimetallic samples of stainless steel 304 and C11000 made using different modes of production.
Strength and Deformability of Cement Composites of Various Types
Authors: Erofeeva I V , Emelyanov D V , Svetlov D A , Matvievskiy A A , Maksimova I N , Makridin N I
Published: March 2021

It is shown that the construction of buildings and structures requires concrete with universal characteristics, primarily with compressive strength in the range of 35-200 (MPa) with high tensile strength, crack resistance and durability. Strength and elastic-plastic and other properties of concretes and other cement composites are regulated by creating their various formulations. In this regard, it is important to conduct comprehensive studies of the properties of composites in relation to their compositions. Cement composites of various compounding compositions, including fillers, plasticizers, pigments, and biocidal preparations, are considered. Attention is also paid to the technological aspects of preparing mixtures and manufacturing products, namely, the influence of activated water on the properties of concretes of mixing and hardening conditions. Indicators of strength, modulus of elasticity, and brittleness were obtained for compositions that differed in the type of plasticizer (“Melflux 1641 F”, “Melflux 5581 F”, “Fortrace–strong”, “Hidetal-P-5”, “Hidetal GP-9” gamma “A”), a biocidal preparation (Teflex Antimould, Teflex Disinfectant, Teflex for Industrial sights), a pigment (iron oxide red, iron oxide yellow, green glauconito-vogo, meerkat iron). The influence on the properties of powder – activated concretes, rheologically active (rock flour), reactively active (micro - silica), fillers, as well as quartz sand fractions 0, 16 – 0.63 and 0.63-5.0 mm. The results of research showed an increase in the strength of concrete when using plasticizer “Melflux 1641F” and activated mixing water in the technology of their preparation. To increase the strength and modulus of elasticity led to the introduction of rock flour and silica. The introduction of plasticizers led to a decrease in the elastic modulus, and the use of activated closing water does not affect this indicator. From the examined compositions, compositions with the addition of pigments are characterized by increased fragility. The brittleness index of composites is mainly reduced when using the heat-and-water treatment mode compared to normal hardening modes.
The State and Prospects of the Issue of Assessing the Fire Resistance of Reinforced Concrete Structures
Authors: Portnov F , Kovaleva S
Published: March 2021

The paper considers the main approaches to assessing the limits of fire resistance of reinforced concrete structures. It shows what regulations are guided by the use of certain methods. The key elements of the evaluation processes were described. Practical examples show the advantages and disadvantages, in particular the impossibility of using calculated methods to evaluate new building materials and structures, the characteristics of which are significantly deviated from the available in the calculation manuals. The convergence of the results of the experimental method of assessment and computer modeling has been shown. Conclusions have been drawn on the need to optimize the calculated methods and the possibility of using modeling methods to pre-assess fire resistance limits to optimize performance, followed by experimental confirmation.
Theoretical Aspects of Production of Products by Hot Isostatic Pressing
Authors: Manyanin S E , Vaxidov Y S , Maslov K A
Published: March 2021

The role of powder metallurgy in the modern world is increasing every year. The introduction of new technologies in powder metallurgy contributes to the successful solution of complex problems in creating parts that have completely new, progressive properties. The development of powder metallurgy is mainly because its technological operations are relatively simple, and the effect achieved with their help in many cases is striking. One of the most promising methods for forming powder materials is the hot isostatic pressing method. This method allows the manufacture of materials and products with special compositions, structure and properties. However, to ensure the necessary characteristics and to eliminate defects in the finished product, it is necessary to strictly observe all technological operations of hot isostatic pressing.
Wear of Asphalt Concrete Pavements and Its Contribution to the Depth of the Rut
Authors: Aleksandrov A S , Dolgih G V , Kuzubov A U
Published: March 2021

The purpose of the article is to determine the contribution of wear of asphalt concrete pavement to the depths of ruts. The method of experimental research is field and laboratory tests. In the course of field work, the thickness of the asphalt concrete pavement in the core taken from the bottom of the rut, between the rut and side bulging of rut, if any, is measured. When performing laboratory work, the indicators of the physical and mechanical properties of asphalt concrete are determined in samples taken from the coating and in reformed samples. Laboratory data make it possible to judge the compliance of asphalt concrete with the requirements of the standard and evaluate its possible compaction by transport during exploitation. The difference in the thickness of the asphalt concrete in the cores taken from different points of the cross-section of the coating allows us to determine the amount of wear and calculate its share in the depth of the rut. As a result, share of the rut depth caused by the wear of the asphalt concrete pavement and the deformation of the structural layers of the pavement and the soil of subgrade were established.
Elastomeric Composites Based on Frost-Resistant Rubbers Containing Karelian Deposit Natural Schungite
Authors: Portnyagina V V , Petrova N N , Mukhin V V , Ovchinnikov N P
Published: March 2021

The article considers the problems of the operation of elastomers and elastomeric products in cold climates. It was shown that the combination of propylene oxide rubber (SKPO) and ultrafine polytetrafluoroethylene (UPTFE) was an effective way to obtain elastomeric materials with improved performance for operation in the northern regions. The general patterns of the influence of natural schungite on phase morphology and the properties of composites based on SKPO and UPTFE were investigated. It was found that with an introduction of small amounts of UPTFE (0.5-1 phr) the properties of elastomeric composites improve. It was associated with the structural features of the fluoropolymer. The particles of fluoropolymer had high activity, nanostructured organization, and the predominant concentration of fluoropolymer particles in surface layers of the material. The introduction of large quantities of UPTFE (50 phr) into the elastomeric matrix led to an improvement in the surface properties of the materials (wear and oil resistance). When substituting carbon black with natural schungite, both surface properties and physical and mechanical properties and compression set were improved. The obtained elastomeric composite will surpass many industrial elastomers by wear resistance and can ensure stable operation of seals under dynamic loading conditions (movable seals) and the presence of abrasives. Replacing carbon black in compositions based on SKPO and UPTFE with natural schungite will have a significant environmental and economic effect since it is much cheaper than carbon black.
Physical and Mechanical Properties of Films Based on Graft Copolymers of Chitosan with N, N-Dimethylaminoethyl Methacrylate
Authors: Mochalova A E , Salomatina E V , Pochina A N
Published: March 2021

The graft-polymerization of N, N-dimethylaminoethylmethacrylate (DMAEMA) on chitosan (CTS) was performed in the presence of ammonium persulfate (PSA) at a temperature of 323K. The effect of the DMAEM concentration in the reaction mixture on the copolymer yield, the degree and effectiveness of grafting, as well as on the physical-mechanical properties of films obtained on the basis of synthesized copolymers was studied. The copolymers formation was prooven by gravimetric method, extraction, and IR spectroscopy. Chitosan-graft-DMAEM copolymers of various compositions were obtained. The grafing degree reached ~ 350 wt. % with the ratio [DMAEMA]/[CTS] = 5 (mol/(base-mol), the grafting effectiveness was ~ 86 wt. % with the ratio [DMAEMA]/[CTS] = 1 (mol/(base-mol). It was established that the changing the copolymers composition lead to variation of tencile strength and deformation characteristics of films widely from 1.4 MPa to 25.7 MPa and from 34% to 413%, correspondingly.
The Investigation of Thermal Conditions on the Porous-Solid Boundary
Authors: Kravchuk V Yu , Rymarov A G
Published: March 2021

The article is a modest investigation of thermal behaviour for a boundary between solid and porous medium. The mathematical model and its numerical proof are presented. Also it explains of boundary conditions and some equation choosing. The term “boundary influence range" is also considered and analysed.
Development of the Composition of Steel Fiber Reinforced Concrete for the Repair of Bridge Structures
Authors: Fedorov V I , Mestnikov A E
Published: March 2021

The article is devoted to the problem of increasing the service life of road networks, which, with an increasing flow of vehicles in harsh climatic conditions, becomes even more urgent. In such conditions, with the traditional approach to the reinforcement of the roadway of bridge structures, defects often appear on the concrete surface in the form of macrocracks and potholes in the protective layer. As one of the ways to solve this problem, the use of concrete with dispersed reinforcement with steel fibers for the upper layer of the pavement is considered, which makes it possible to increase its strength and impact strength. To determine the required amount of concrete mixture components with specified performance characteristics, a two-factor experiment was carried out, which made it possible to obtain a regression dependence of the ultimate compressive strength of steel fiber reinforced concrete at the design age, depending on the proportion of the mass of steel fiber on the mass of solid components and the proportion of the mass of organo-mineral additives from the mass of cement. The recipe of steel fiber reinforced concrete, developed on the basis of the experimental data, was tested during the reconstruction of one of the bridges of the A360 Lena federal highway.
Air Quality Upgrading in Residential Areas Using Architectural Methods
Authors: Balakin V V
Published: March 2021

According to results of natural observations in big cities and using building models, some optimum techniques for planning and development have been revealed providing hygienic norms of emission content from vehicles in main streets within the comfortable weather classes defined by combinations of wind speed, temperature, and air moisture. Patterns of air flow transformation were revealed by the speed and direction as well as distribution of polluting substances on the cross section of urban streets with variation of their width, height, and housing density. Planning conditions have been determined contributing to the formation of the stable vortex and the elevated air pollution resulting from the closed circulation of vehicle emissions in the street canyons. Possibilities to provide the air quality are determined under the conditions of the historically formed urban development by way of realization of planning reconstructive and organization regulative measures. Special aspects to choose and realize urban planning steps are chosen aimed at air protection in various geographic areas with a typical annual trend of changing climate forcing. It is highlighted that in landscape zones with a pronounced seasonal character of climate forcing, an individual approach to choosing urban planning methods is needed to regenerate the urban environment as applicable to problems arising in different seasons.
Modeling of Efforts on Cylinder of Boom Lift of Small Loader
Authors: Kudryavcev E
Published: March 2021

Article describes process of modeling of efforts on cylinder of boom lift of small loader. Article include analytical researches and modeling of interrelations of various parameters of the working equipment of loader and define efforts on a cylinder of boom lift, including and the maximum efforts, under various conditions of using. The proposed procedures of modeling allow to reduce time and costs of such calculations at least in several hundred times and effectively to define optimum parameters of the working equipment of such loaders, providing good visual presentation of received results.
A Study on Teaching the Kinematic Analysis of Structures (Based on the Approach Applied in Learning Process at Industrial University of Tyumen)
Authors: Shagisultanova J , Panfilov A
Published: March 2021

2020, the year marked by global pandemic, revealed a number of systemic weak points, including those in higher education industry in general and in teaching approaches to the discipline of Structural Engineering in particular, which would have remained uncovered under usual conditions. Earlier articles highlighted the positive impact of applying the workbook-based teaching method, developed by the authors of this article, on student learning. However, mass transitioning to online education has helped identify a series of issues that students had to face in the course of their studies. One of these problems included conceptual understanding of how the calculating model, especially a model of a statically indeterminate structure (building), was formed. This article is dedicated to the new methods of teaching kinematic analysis, which have already been put into practice in the virtual classroom of Tyumen Industrial University (TIU).
Vibration Characteristics of Railway Trains
Authors: Tsukernikov I E , Shubin I L , Nevenchannaya T O
Published: March 2021

The problem of predicting vibration on the territory of residential buildings adjacent to the projected lines of rail transport is considered. The concept of vibration characteristics of trains is introduced as an intrinsic characteristic of a vibration source, the knowledge of which is necessary to predict vibration parameters in an area of impact of lines. The substantiation is given for choosing the equivalent and maximum value of vibration velocity as the parameter of the vibration characteristic. For four generalized types of soils, the values of the maximum distance from the middle of the nearest track were obtained for the experimental determination of the vibration characteristics of a passing train. The assessment was carried out in the frequency range inherent in the vibration generated by rail transport on the basis of the insignificance of the influence of the soil parameters on the values of the vibration characteristics. This makes it possible to determine the values of vibration characteristics irrespective of the type of track structure and to consider the obtained value as an intrinsic characteristic of trains, which depends only on the parameters of their movement.
Features of Regulation of Heat Energy Consumption by Heating and Ventilation Systems in Agricultural Buildings
Authors: Biryukov S V
Published: March 2021

The article is devoted to the regulation of heat energy consumption by heating and ventilation systems, as well as to the design features of agricultural buildings. Approaches to the regulation of heat energy consumption and compliance with the standards of specific heat consumption of agricultural buildings with civil standards for the cold climate zone of the Russian Federation are given.
Economical Aspects of the Cost Regulation for the Construction of Buildings
Authors: Sinenko S A , Doroshin I N
Published: March 2021

The management of organization projects becomes specially actual, when there are formed in Russia the conditions of wide use of the project management methodology. The method given is an effective management tool in real Russian conditions in the same time is a tried mean of realization of organizational projects of the necessary quality, in the fixed time, within the limit of accepted budget. The project cost is defined by the combination of costs of project resources, by costs and time of execution of works of the project. For the construction projects the cost of construction is defined, which represents the part of project cost, that includes money, necessary for the capital construction. The calculation of all expenses on the project is equivalent to the general project cost. The management of project cost includes processes, necessary for the provision and guarantee of the accomplishment of project in the limits of affirmed budget. In the context of this paper cost management and expenses management are practically the same terms.
Structure of Fe-Cu-Nb-Si-B Alloys with Various Copper Concentration
Authors: Tkachev V V , Il’in N V , Kraynova G S
Published: March 2021

In this paper, for alloys: FeCu0,2Nb3Si16,5B6, FeCu1Nb3Si16B6, FeCu1,5Nb3Si16,5B6 inhomogeneity of structure in thickness is shown with using scanning and transmission electron microscopy, crystalline phases are determined. It is noted that a multiphase magnetic structure is observed in an alloy with a low copper content upon complete crystallization.
The Problem of the Vladivostok Fortress Fortifications’ Reorganization
Authors: Moor V , Gavrilov A , Makarova A
Published: March 2021

There is a large number of fortifications built in Vladivostok and its suburbs. The constructions of Vladivostok Fortress are an outstanding example of fortifications and defensive architecture. The complex of Vladivostok Fortress is well-studied, but the problem is that these significant elements of the cultural landscape are gradually being destroyed. And there are several reasons for this. On the one hand, it is caused by the insufficient funding of measures to preserve the existing structures. On the other hand, there is no scientifically grounded strategy for preserving and reorganizing these constructions. There is also a demand for specific project proposals related to the reorganization and modern use of Vladivostok Fortress constructions. In the article, we consider this problem first in general theoretical terms, and then we suggest a specific proposal to reorganize fortifications on the Nazimov Peninsula in Vladivostok to turn it into the Park of Military Glory.
BIM-technologies and Modern Methods of Planning and Management in Building, taking into account Supplies and Costs
Authors: Tsapko K , Melnikov L
Published: March 2021

The article deals with the problematic aspects of communication using information and intelligent environments in the building industry - software systems BIM-modeling and production management. We consider issues of effective communication in software environments for network management and enterprise management improvement. The article notes the importance of role-based communications in the innovation process. Based on the information approach to the development of communication, we show the possibility of creating institutional forms of innovation in the management of building production with the help of software packages BIM-modeling and production control.
Bearing Capacity of Steel-Polystyrene Concrete Slab
Authors: Kostyuchenko Ya B , Varlamov A A , Rimshin V I , Bykov G S , Roschina S
Published: March 2021

The article proposes the construction of a steel-concrete floor. Processes of making, modelling and testing of steel-polystyrene concrete beams and slabs are considered. The results of tests of prototypes are presented. During the tests, the stresses in the steel components of the beams and the deflections value of the plates were measured. The combined action of a thin-walled steel structure and polystyrene concrete is noted. As a result of the combined action of polystyrene concrete and a thin-walled profile, it was possible to more evenly distribute stresses in the metal profile. The destruction of the structure occurred due to the loss of stability of the upper profile belt between the anchoring points. Polystyrene concrete slab is recommended as a roof slab in residential buildings.
Temperature–Time–Transformation Diagrams Construction for Beta-Solidifying TiAl-Based Alloy in As-Cast Condition
Authors: Panin P V , Lukina E A , Shiryaev A A
Published: March 2021

An experimental investigation of structure evolution kinetics in a new six-component TiAl-based alloy Ti-44.5Al-2V-1Nb-(0.5…L5)Zr/(L5…2.5)Cr-(0…0.1Gd) (at.%) with variable Zr, Cr, and Gd content has been accomplished under the conditions of high-temperature exposures in the temperature range 1000–1300°C and durations of 15–240 min. The Temperature – Time – Transformation diagrams have been constructed to summarize data on isothermal phase transformations for both Zr(+Gd)- and Cr(+Gd)-containing compositions with the initial as-cast structure. It is shown that the variation of Zr and Cr contents within the given limits for the studied alloy, as well as the doping with Gd microadditions in the amount of 0.1 at.% do not lead to any noticeable effect on the kinetics of structure behavior in isothermal conditions.
Experimental Testing of Anti-Corrosive Ferrosilicon Treatments for Dense Medium Separation of Diamond-Bearing Raw Materials
Authors: Timofeev A S , Dvoichenkova G P , Chernysheva E N
Published: March 2021

Experimental studies have shown that electrochemical effects and inert nitrogen gas used for mixing ferrosilicon instead of air, which contains a strong oxidant—oxygen—are indeed effective methods for reducing the corrosive effects of an aqueous medium on ferrosilicon pellets. This research determined how effective nitrogen application to the ferrosilicon pellet surface was in protecting them from corrosion as they interfaced with water systems in the process of dense medium separation.
System Infrastructure Formation Support for Business Activities in Coastal Destinations
Authors: Dyshlovoy I N , Ostovskaya A A , Pavlenko I G
Published: March 2021

The intensive development of the infrastructure support for entrepreneurship is considered to be one of the major strategic foci of the public regulation of business in the conditions of the developing market relations and is particular sensitive to the structural changes in the economy, efficiency of the national economic policy and economic, social, financial, structural and administrative measures, specifically in small business as it takes on a social function as a catalyst of the new products and service creation by serving the needs of the population and finding new supply and sales channels. The infrastructure system for entrepreneurship in a coastal destination is a complex of locally operating industries including construction of roads, canals, ports, bridges, airdromes and warehouses, power stations, transport, communication, education, information services, science, healthcare, financial and credit and legal services. However, it is crucial to understand that coastal destinations display a certain distinctive feature; i.e., apart from being associated with a certain territory, they, first of all, generate tourism services which play the role of a key strategic factor in the development of such destinations. Thus, there is an objective need for providing rationalization and methodological recommendations on further effective development of tourism destinations influenced by the bulk of tourism services. Further studying of coastal destinations under current conditions of entrepreneurship development requires elaboration of workable tools of destination promotion based on the range of offered services, which is expected to subsequently allow for continuous development of recreation and tourism.
Journey of Mark Twain to Crimea
Authors: Shendrikova S P , Shendrikov A A , Pavlenko I G
Published: March 2021

The resort can be regarded as a kind of parallel reality to which a person sets off for a certain amount of time in order to rest, recreate and then return to their usual environment. The most evident reason for the emergence of resorts as civilizational phenomenon is the fact that society of the 19th century acknowledged the problem of quality of life and public health. In connection with the incorporation of Crimea to the Russian Empire in 1783, a new era began in the history of the peninsula, which is of great interest to both Russian and foreign societies. The amount of people who wanted to visit the peninsula grew significantly over time and peaked in number in the 60’s of the 19th century. The majority of tourists coming to Crimea were those representing the intellectual elite of the society who wished to get a first hand experience with the remnants of the rich past of the Crimea as well as its healing climate and recreational potential. The majority of the researchers were scientists chasing the idea to conduct research in various fields of science, study distinguished places and the uncharted corners of the mysterious peninsula. In addition to the official and festive visits, scientific expeditions and descriptive business trips, various tourist, cultural and treatment-and-prophylactic trips had been made.