bluuebunny/crossref_metadata_2025 huggingface dataset:
How Voltage Spikes Affect the Accuracy of Reading Convector Rated Heat Flux
Authors: Antsiferov S A , Prjadilov A V , Chirkova E V
Published: March 2020

The authors hereof have analyzed the standards and past research in heating systems. The paper considers the circuitry of test bench electrification and instrumentation. It describes an experimental setup and an automatic system to control the temperature of the heating circuit; the system is based on a Honeywell MVC80 controller and uses an HD-4022.10U a TRIAC solid-state relay. Control voltage curves are presented. The paper provides generalized data obtained in a series of tests of Lider PS10000 SQ-E voltage regulators (0.5% regulation accuracy) and a CHBT-200003 voltage regulators (3% permissible voltage deviation). The system has been tested to measure the rated heat flux of a KCK 20-1,049 convector by water- and electricity-based methods; effects of voltage spikes on the measurement accuracy are discussed herein.
Design Features of Transport Facilities
Authors: Kazaryan R R , Pogodin D A
Published: March 2020

The provisions of the theory of probability and mathematical statistics are widely used in the design of transport facilities, the organization of construction and operation of roads. This is because traditional deterministic calculations often lead to errors or miscalculations due to the probabilistic nature of the geometric and strength characteristics of pavement layers, structures, building materials. The elastic moduli of the subgrade, the subbase, the base, and the pavement may deviate from the values taken in deterministic calculations by 10–20% upward or downward. In the production process, it is impossible to precisely maintain the thickness of the structural layer, which is reflected in the acceptance rules for finished layers (deviations from the design thickness of up to 10% are allowed). These deviations may constitute an unfavourable combination reducing the strength of the structure and reliability of the road as a whole.
Indirect Reinforcement of Reinforced Concrete Elements as a Means of Protecting a Constructive System from a Progressive Collapse
Authors: Fedorova N V , Phan Dinh Quoc , Korenkov P A
Published: March 2020

A variant of the diagram of static-dynamic deformation of compressed concrete, reinforced by indirect reinforcement of statically indefinable structural systems in bending reinforced concrete elements, is constructed. The characteristic parametric points of the static section of the diagram to the level of the operational load are determined by a three-line diagram using the proposal of A G Tamrazyan. The linear dynamic part of the deformation caused by a sudden structural reorganization of the constructive system is described by the deformation model of G A Geniev. The increments of dynamic forces in an arbitrary cross section of a reinforced concrete element with indirect reinforcement n times of a statically indefinable structural system are determined by a quasistatic method on an energy basis. Numerical analysis of a two-span continuous beam loaded with a given operational load and a special effect in the form of a sudden removal of one of the supports shows the effectiveness of indirect reinforcement to protect the structural system from progressive collapse.
Development of Mathematical Model of High Rise Apartment Buildings Construction Complex Quality Index Assessment
Authors: Lapidus A , Shesterikova Y
Published: March 2020

A factor matrix was obtained and using regression equations the connection between the complex quality index and the values of the impact factors was determined. As a regression model, a linear regression quadratic and cubic models were used. It was determined that the most convenient form of noting a mathematical model while performing regression analysis calculations is an equation of a second-order polynomial. The research of the obtained mathematical model is made with the use of the methods of mathematical statistics - dispersion and correlation analyzes. It is proved that the mathematical model adequately describes the research process
Numerical Study of the Effect of the Wall Thickness of a Steel I-Beam on the Form of Loss of Local Stability
Authors: Sventikov A A , Kuznetsov D N
Published: March 2020

A large number of elements of steel building structures made of I-beam section profiles. It is economically advantageous to use I-beams with thin web thickness (vertical member of I-beam section). The safe use of thin web thickness of I-beams prevents possible deformation of the section profile member of the steel I-beam under load, before the loss strength (resistance) of the element. Research on the loss of stability. i.e. buckling of web plate (vertical member of I-beam) shows that thin web plate thickness does not reduce safety of the building and structures during its operation and maintenance. The results of calculation on stability of test models of I-section steel beams with a span of 12 m with various web thicknesses: 4, 5, 6, 7, 8, 9 and 10 mm. The load is collected for beams with steps of 6 m. The calculations are performed in a program “the SCAD Office computer complex”, which is based on the finite element method. The design testing model which is a simple supported beam is prepared in a finite element form; left support is a pin joint while the right support is a roller joint. The load was applied evenly distributed with constant intensity. The web wall of the I-beams is divided into seven compartments by transverse stiffening ribs. Thicknesses of the web plate of each beam were taken to be the same for all compartments. The forms of loss of local stability for various web thicknesses are shown. The change in the influence of force factors on local stability, with changing thickness of the web of the I-beam (section profile). So, for web thicknesses of 8, 9 and 10 mm in the studied steel beams, the loss of local stability occurs in the middle section, where the maximum value reaches bending moment My. While for I-beam with web thicknesses of 4, 5, 6, 7 mm in the beams under study loss of local stability occurs in the extreme compartment where the maximum values reach the transverse (shear) force Qz. The revealed change in the shape of the loss of I-beam’s web plate (vertical member of the I-section) stability may indicate a more significant effect of the shear force Qz for webs of smaller thickness. The analysis of the results is given numerical calculations.
Deformation and Failure of a Monolithic Reinforced Concrete Frame under Accidental Actions
Authors: Kolcunov V I , Tuyen Vu Ngoc , Korenkov P A
Published: March 2020

The results of experimental and theoretical studies of deformation and failure of monolithic reinforced concrete (RC) frames under accidental action caused by the sudden removal of one of the columns are suggested. Experimental studies have been conducted on the model of structures of RC frames designed from fine-grained concrete class B40 with reinforcement class A500. Loading of experimental structures of frames was realized by gravitational method using a specially designed lever loading device. Accidental actions in the form of sudden removal of the сentral columns of the frame were modeled using a special designed device in the form of switch-off columns. The calculation of the experimental frame structures is executed on by an analytical method on an energy basis using level calculation schemes. Comparison of the calculation results with the test data on the parameters of deformation of structural elements and strength criteria of frames under the considered actions showed their satisfactory agreement.
Method of Choosing Energy Carriers for the Needs of Power Supply of Settlements
Authors: Medvedeva O N , Bessonova N S
Published: March 2020

Today country level of the gasification does not exceed 70% for several reasons. Firstly, such areas as the Far East, Eastern Siberia and the northern part of Western Siberia are difficult to access. Secondly, the gas pipeline located next to settlements does not always guarantee affordable gasification of the area. Larger consumers benefit from liquefied gas. The article suggests methodological recommendations for choosing rational gas supply schemes for consumers. Ensuring the proper level of gasification of the country will improve, and in some areas create, energy infrastructure, ensure economic growth in the regions, improve the ecological situation, and also partially solve problems with overpopulation in the central regions of the country through the active development of remote territories of the Russian Federation [1, 2, 3]. Thus, the issue of gasification of the Russian Federation does not lose its relevance to this day. A promising direction is development of the gas supply in rural areas. The weak infrastructure of the countryside strongly inhibits the economic development of the country as a whole. The proper level of gasification will ensure the creation of industries that do not require powerful energy sources and a large number of service personnel.
Research on the Strength of Compressed Masonry Elements from Cellular Concrete Blocks with Transverse Reinforcement
Authors: Goykalov A N , Novikov M V , Gulak L I
Published: March 2020

The work is devoted to the study of the possibility of using transverse reinforcement to increase the bearing capacity of masonry from aerated concrete blocks and the development of a calculation method that allows to quantify the proposed reinforcement. The need for the formulation of such studies was due to the lack of regulatory data regarding the reinforcement of the masonry concrete blocks, as well as an increase in production volumes and demand for cellular concrete. The results of experimental studies of masonry of aerated concrete blocks, reinforced by welded meshes under the short-term action of axial compressive loads are presented. The effect of increasing the carrying capacity due to the constraint of deformation of the masonry due to transverse reinforcement is revealed. The reinforcement rods of welded meshes, located in horizontal mortar joints, possessing a much greater modulus of elasticity than the masonry, prevent the development of masonry deformations in the transverse direction and, thereby, create lateral compression stresses. The proposed and experimentally confirmed by the authors method of increasing the carrying capacity of compressed elements, based on the principle of transverse (indirect) reinforcement of stone materials, can be applied to the laying of concrete blocks.
Systematization of Factors Affecting the Organizational Processes in the Conversion of Buildings
Authors: Topchiy D , Bolotova A
Published: March 2020

The impact of defects in construction operations can be assessed in terms of ensuring reliability and safety of buildings and structures. Defects may diminish the bearing capacity and stability of a structure, cause deterioration, reduce durability, and lead to an accident. In more than 60% of cases, accidents in monolithic construction projects may be triggered off by faults in concreting and reinforcement jobs. This article analyzes the main types of defects at the most critical technological stages, determines the factors affecting the defect detection process, gives a brief description of the nature of damage and deterioration of monolithic reinforced concrete structures, proposes classification of defects by degree of criticality, including those in critical structures, and, based on inspection results, offers a conclusion on the need for recommendations and experimental research aimed at improving the technological processes of monolithic reinforced concrete construction operations, including those using nondestructive methods of testing the strength of monolithic structures at the concreting stage.
Analysis of Approaches to the Implementation of Programs for the Urban Complexes Reconstruction in Russia
Authors: Selyutina L G , Pesotskaya E V , Trushkovskaya E D
Published: March 2020

The article analyzes the methodological approaches to the development of comprehensive programs for housing construction and reconstruction of residential buildings at the level of a large city in the current socio-economic conditions of Russia. Particular attention is paid to the recommendations on the formation of implementation models using the tools offered by socio-economic programming and investment design. The study may add a new look at the formation of urban planning formations (complexes), which act as objects of management in the reconstructive construction sector. Such entities in the context of this study are identified as complex objects of reconstruction, built on the basis of economic feasibility and the provisions of a single urban policy.
An Engineering Estimation Method of the Sound Insulation of Massive Partitions on the Base of Design Model with Lumped Parameters
Authors: Saltykov I P
Published: March 2020

The issue shows theoretical and practical approach to the massive single-layer partition’s design on the base of lumped model’s method, provided by Zakharov A.V. The expediency of using the “Mass Law’s” formula in case of the normal noise wave’s incidence on the sound isolating partition, due to the adherence of continuity conditions of sound waves transmission at the interface of two media, is approved. The common simplified equations for the massive partition’s sound insulation for the engineering method, which is based on lumped (discrete) models, are derived. The execution sequence of one-layer partition’s engineering insulation design is given and the frequency response graph for the concrete one-layer partition based on this design is also represented. The comparison results of the medial three octave deviations of the sound isolation figures from the experimental data between Russian normative document method and the proposed engineering method for the different construction materials are represented.
Modelling Methods in Solving Research and Design Problems in Architecture Activities
Authors: Vasilenko N A
Published: March 2020

The modern architectural and city-planning science requires combining the efforts of a number of various research teams, including representatives of different branches of scientific knowledge, with the purpose of designing the most rational and efficient methods of research organization. Due to the dynamic nature of architectural and city-planning objects and quick alteration of the parameters of their elements and components, prompt methods of solving research, designing or forecasting problems are necessary. The era of the fifth technological paradigm is characterized with the establishment of such branches of industry as electronics, microelectronics, information technologies. Since 2010ies we live in the phase of the sixth technological paradigm development, in which the production processes are based on cloud infrastructure and virtual services. One of methodological preconditions in the further development of architecture is the search for optimal solutions in the process of research and designing developments, which could be the most quickly and efficiently implemented by means of computers and information models. For this purpose, first of all, the appropriate formalization of architectural objects is necessary – i.e. creating functional mathematical models and software products for implementing the process of research and solutions optimization in computing techniques. Current studies in the sphere of architecture more and more lead to realizing the necessity of system approach to research and designing of architectural objects as complicated systems, having the hierarchic structure. The most promising are the system methods of research, designing and expert evaluation of architectural objects of any degree of complexity.
Bus Stops - a Component of Urban Improvement on the Example of the City of Vladivostok
Authors: Chernyavina L A
Published: March 2020

In this publication, the author examines on the problem of creating a comfortable urban environment on the example of the analysis and modernization of bus stops in Vladivostok. In the course of the research work, seven bus stops of the city were selected and analyzed in terms of their compliance with the General technical requirements adopted and put into effect by the order of the Ministry of transport of the Russian Federation, as well as in terms of convenience of their operation by citizens, for which appropriate surveys and sociological measurements were conducted. Also existing in the city bus stop compared with the best foreign and Russian counterparts. As a result of the research work, system errors were found: gross violations of GOST, defects in the design of structural elements, formal compliance with many requirements, on the basis of which a set of measures was developed and constructive solutions were proposed to significantly improve the network of bus stops of the city. The final project solution will be submit to the city administration.
The Development of the Plaster Coating Materials Operated Structure by Processing Waste Recovery
Authors: Kramarenko A V , Mustekova A M
Published: March 2020

In present work there are main plaster coating materials mentioned, also as main materials being base for plaster coating materials operation do. There were complex research realized, which included theoretical, practical, experimentally theoretical scientific cognition methods to apply possibly processing waste (partically, eggshell) for final coating operating. The manufactures monitoring was set and done with eggshell waste. There was plaster coating arrangement technology using eggshell was developed. There was the choice of test equipment and binding material done. As the result of experiments series there was data of the strengthening parameters while binding material added, obtained; also there was definitive strengthening parameters while different kinds of binding material added, analyzed. All of the satisfying consuming parameters of such final coating were detected.
The Second Stage of the Stress-Strain State of Reinforced Concrete Constructions under the Action of Torsion with Bending (Theory)
Authors: Kolchunov Vl I , Dem’yanov A I , Naumov N V
Published: March 2020

Authors proposed a new approach for determining tangential torsional stresses for arbitrary cross sectional rods, based on simplified assumptions of material resistance. The main feature of this approach is the approximation of rectangular or any complex cross section of reinforced concrete structures by describing a large circle around the cross section and splitting it into small squares with circles inscribed into them. Authors have formulated three theorems. The first one relates the accumulation of tangential stresses (increments) from the edges to the middle of a rectangular cross-section with the formula for determining tangental stresses for round cross-sections. The second theorem allows us to establish a connection between the tangential stresses calculated for each of the small squares-circles and the tangent stresses of the large circle through their increments. The third theorem makes it possible to find tangential stresses for each of the small square circles. The proposed approach allows us to remove the need to use special tables for the calculation not only in the elastic stage. It also makes it possible to separate the stress-strain state in the whole set of round cross-sections from the additional field caused by the deplanation of the rectangular cross-section. In addition, the proposed approach makes it possible to take into account the concentration of angular deformations in the incoming angles and other places with changing geometric parameters.
Methodological Approaches to the Formation of the Organizational and Technological Mechanism for Improving the Manufacturability of Work during the Overhaul of Buildings
Authors: Korol E A , Petrosyan R S
Published: March 2020

The article is devoted to the problems of the formation of the organizational and technological mechanism for improving the manufacturability of work during the overhaul of buildings. Manufacturability is considered as a combination of properties that make it possible to manufacture them with the least labor, materials and means, using advanced technology and providing prudent project technical and economic performance indicators. It is necessary to identify existing reserves that contribute to improving the manufacturability of works during the overhaul of buildings, as well as to analyze the causes of their occurrence and ways of their use in order to increase the main parameters of manufacturability. Works, as a rule, is carried out in extremely cramped conditions, which determines the specific technology for their implementation, the use of special equipment, mechanisms, tools, devices. The duration of the overhaul cannot be reduced to the detriment of reliable and safe operation of the facility.
Vibroacoustic Efficiency Evaluation of Anti-Vibration Piping Support for Engineering Systems of Multi-Storey Buildings
Authors: Anan Saqer Eias Nazzal , Sekacheva A A , Noskov A S
Published: March 2020

The causes of low-frequency noise in high-rise building pipelines are studied. Sources of increased vibration of pipeline systems are identified. The analysis of methods of damping increased vibrations of pipelines is conducted. A description of the pipeline support structures used in the field of building construction and special anti-vibration supports is given. The advantages and disadvantages of the designs of anti-vibration supports of pipeline systems are identified. A method for improving the existing anti-vibration support consisting of all-metal elastic-damping elements pressed from spirals of wire is proposed. An anti-vibration support, consisting of a body and sealed capsules filled with a damping fluid, was developed. The design of the anti-vibration support, which allows adapting to the vibration mode due to the displacement of the pipeline relative to the support body and the redistribution of the damping fluid pressure in the capsules, is presented. The effectiveness of the proposed design support was confirmed experimentally.
Development and Research of Constructive and Technological Solutions Driven Drop-In Piles with Increased Bearing Capacity
Authors: Kocherzhenko V V , Lukyanov A I
Published: March 2020

The article presents the results of the study of the effect of the amount of large-size filler (fraction 5.0-0.65 mm), introduced into the fine sand at its angle of “internal friction”; the design of the developed pile with “pockets” on the side surface, which are filled with filler from the collar (funnel) on the surface of the soil and allows you to change the granulometric composition of the soil around the perimeter of the pile. Experimental studies of the interaction of the side surface of the models developed piles with large-size filler in the process of their driving in a soil tray with fine sand are presented, which showed that the proposed design and technological solutions increase the bearing capacity of the piles by 25% compared to prismatic ones without the use of filler. It is established that in the process of hammering the contact plane of the filler with fine sand is inclined from the vertical by about 100, which allows us to consider the developed pile as pyramidal. The method of calculation of bearing capacity of piles taking into account the proposed design and technological solutions is proposed.
Structure Behaviour Analysis and Detection of Errors Made at the Design Stage
Authors: Alekhin V , Antipin A , Avdonina L
Published: March 2020

The reconstruction of public buildings is one of the most important fields of construction engineering. Reconstruction works allow not only increasing the service life of buildings, but also improving the quality of premises, equipping buildings with more advanced utility equipment, enhancing the architectural appearance of buildings, and increasing their energy efficiency. An individual approach to the development of reconstruction methods and procedures shall be taken for buildings built in different years. Furthermore, when developing a reconstruction project it is very important to use actual versions of relevant normative documents and consider the effect of structures being installed on the main load-bearing structures of a reconstructed building. It is also necessary to analyze the influence of new structures on the existing structures of the building. This work contains the analysis of behavior of reconstructed roofed market structures. Errors made during the reconstruction are highlighted. The results of analyses are described and the conclusion regarding the load-bearing capacity of the reconstructed building framework is given.
The Third Frequency Range of the Sound Insulation Plot of the Single-Layer Partitions
Authors: Zakharov A V , Saltykov I P
Published: March 2020

The main concepts of sound insulation theory of the massive plates were developed in the mid-20th-century. There were obtained the frequency dependence of sound insulation from the plate mass and the plate stiffness [1, 2]. The multiple researches on dependence of insulation from sound incidence angle [1, 2, 3, 4] and coefficients of internal friction for plates materials were carried out [1, 2, 3, 4]. The comparison of theoretical and experimental results showed the generally statistical matching, but in the same time, there were frequently observed their considerable differences [1, 2].

There was a necessity in additional studies in that period. Due to the electronics development and perfect appliances on its base, the observational researches begun to prevail, such as in issues [5, 6, 7, 8, 9, 10]. Thereafter, the reference curves with the three frequency ranges for sound isolation calculation were obtained, due to the large mass of experimental data processing. The first two ranges are divided by the wave coincidence frequency, and the third one limits the maximum possible insulation irrespective of frequency.

The articles [11, 12, 13] show, that the existing formulas of sound propagation through the interface of two media and the flat layers, which are developed from the continuity conditions, mismatch to these conditions on all incident angles, except of the normal. So the present insulation theories, which are depending from the sound incident angle, make no sense.

The issue [14] shows, that the calculation sound insulation method, which is based on discrete (concentrated) models of sound propagation with the application of momentum conservation law and the kinetic energy for the plates with the mass more than 50kg/m2, gives the more exact results of comparison with the experimental data [15, 16], than with the calculation data by the standard curve. The contributions [15, 16] contains the evidences about the sound insulation values mainly in first two frequency ranges. The third frequency range is become beyond the limits of measurements. This article contains the results of publication materials, involving the sound insulation data at the third frequency range.
Visualization of the Cargo Orientation in Space under Movement by a Tower Crane in Low Visibility Conditions
Authors: Lialina O A , Penner Y A , Senchenko V A , Solovev D B
Published: March 2020

This article discusses the problem of improving safety on the construction site and the efficiency of the tower crane operators. It is proposed to introduce into operation LED lighting devices to ensure the visualization of the orientation of the load in space. For this purpose, during the work the indicators of the visibility range of the light glow of halogen and LED lamps in fog conditions at the construction site of the Lakhta Center were compared.
The Stress Strain State of Composite Multi-Span Beams
Authors: Sergeev M S , Gribanov A S , Roschina S I
Published: March 2020

The article presents a new design of a wooden beam. The essence of the proposed design is the rational reinforcement of multi-span glued beams. Reinforcement is performed in places of stretching of wood fibers according to the diagram of moments. A comparison of the design to assess its rationality was made with an unreinforced glued beam with the same design scheme. The numerical experiment showed the relevance of such amplification. So at the same given load there is a significant reduction of normal and tangential stresses in the cross section of the structure under study, which ultimately leads to a reduction in the cross sections of the whole beam and its better ergonomics. From the point of view of work production the technology on pasting of cores in a beam body can be considered well approved positively affecting technical and economic indicators.
Improving the Energy Efficiency of Autoclave Equipment by Optimizing the Technology of Manufacturing Parts from Polymer Composite Materials
Authors: Zaychenko I V , Bazheryanu V V , Gordin S A
Published: March 2020

Autoclaves used for the manufacture of parts from polymer composite materials (PCM) for structural purposes are equipment that consumes a significant amount of energy.

In the manufacture of parts of a monolithic design from PCM in 2 transitions in order to reduce energy consumption, it was proposed: during the first molding, reduce the main exposure time, which reduced the operating time of the autoclave tens. In the workpiece, the complete polymerization of the adhesive binder occurs during the second molding transition. Also, it was proposed to manufacture parts of a honeycomb structure from adhesive prepregs for one molding with an autoclave under-molding at an elevated temperature instead of the first molding. The formation of a monolithic zone of honeycomb parts in one cycle eliminated the formation of unacceptable defects: “delamination” and “increased attenuation of the ultrasonic signal.” A change in the technology of molding PCM parts has reduced manufacturing time, labor and energy consumption compared to the previously used mode in 2 transitions. The quality of gluing parts according to this advanced technology is confirmed by the results of acoustic control and mechanical tests.
Regulation of Mechanical Properties of Advanced PCM Products with the Aid of Catalysts
Authors: Zaychenko I V , Bazheryanu V V , Kim A G
Published: March 2020

The article considers the problem of the effect of uneven curing caused by the temperature gradient across the thickness of the material on the anisotropy of the strength properties of polymer composite materials. The effect of catalysts on the curing of the epoxy binder EDT-69N, used for the manufacture of multilayer polymer composite materials, was studied. According to dielectric spectrometry, the accelerating effect of the selected compounds on the curing process of the EDT-69N epoxy binder during fiberglass molding has been proved. The possibility of controlling the curing process using catalysts to reduce the influence of the temperature gradient on the anisotropy of the strength properties of the matrix in the manufacture of polymer composite materials is shown.
Short-term and Long-Term Deformations of the Lightweight Concrete
Authors: Lukin M V , Popov M V , Lisyatnikov M S
Published: March 2020

The article is devoted to the study of the short-term and long-term deformations of the lightweight concrete which has found ever-growing use in various fields of construction. The main direction of the lightweight concrete usage is its application in the load-bearing and enclosing structures of buildings and structures. The lightweight concrete has fundamental differences from heavy weight concrete and this is primarily due to the special characteristics of the porous aggregates in their composition. Concretes with such aggregates as expanded clay, expanded perlite and agloportite with strength from 10 to 60 mPas, whose deformative properties are represented by the stress – strain diagram in fig.1, have been investigated in this work. The dependence of the diagrams completeness on the type of aggregate at various concrete strength indexes is given in Table 1. The ascending branches of the diagram for the whole range of the strength has ended when a deformation has reached 2,2·103. The concrete stress corresponding to the limiting compressive strain of all types of concrete has been 85% of the maximum value. All the diagrams intersect at one point, the descending branches diverge at a stress level of 0.75 and the deformations have been 2,9…3,7·103. The data obtained as a result of the investigation can be used to calculate the normal sections of bending and eccentrically compressed elements with allowance made to the properties of the lightweight concrete that significantly expand its promising applicable scope in areas with complex geological conditions and in seismic areas.
Methodical Bases of Improvement of the Existing Normative Legal Base in the Sphere of Town and Country planning
Authors: Tyuterev A A , Makarova T V , Semenova E E
Published: March 2020

Problem definition. The analysis of concept of comfort of the urban environment and essence of the principles of forming of apartment block from position of town-planning norms. Results. By method of the analysis it is established that the existing regulatory base does not meet the modern requirements of forming of apartment block and the comfortable urban environment. Conclusions. By results of the conducted researches recommendations for modification of town-planning norms are formulated.
The Evaluation of Radon-Protective Characteristics in Engineered and Existing Buildings with the Radon Diffusive Entry from the Soil
Authors: Shubin I L , Bakaeva N V , Kalaydo A V , Skrynnykova A V
Published: March 2020

A human receives more than half of the annual individual radiation dose from the radon and its progeny contained in indoor air. Therefore, in order to limit domestic exposure of the population in the Russian Federation the national radon control levels have been established. The excess of these levels is not allowed in buildings with a long people’s residence. Radon entry into the building through horizontal underground walling from the soil base and therefore, the restricting of the soil radon flux in the ground floor rooms indoor air is possible only with construction technologies and means. The effectiveness of radon-protective technologies directly depends on the understanding of the laws of radon transport in porous media, since this transport may occur through diffusion and/or convection (filtration). Each of these mechanisms may be dominant under the certain conditions and requires its own radon-protective measures. This article compares the density of diffusive and convective radon fluxes in the entire range of soils permeabilities. The range of underground walling and soils permeability was determined, in which the prediction of radon conditions in a building can be built exclusively on the patterns of diffusive radon transport in porous media. The approach to the underground walling design on the basis of the one-dimensional model of stationary diffusive radon transport in porous media is proposed.
Modeling Parameters of the Annual Production Program of a Construction Organization
Authors: Oleinik P , Yurgaytis A
Published: March 2020

In this article, authors consider the nomenclature of the parameters of the annual production program, obviously affecting the intensity of work on the objects and, consequently, on the timing of the fulfillment of obligations under general construction contracts in general. A systematic analysis of these factors is carried out with a study of the degree of influence on the duration of the construction project. As a result of these studies, the authors present a model of the annual production program of a construction organization in terms of the input significant parameters.
Role of Cultural Heritage in the Sustainable Development of Rural Settlements
Authors: Sedova A , Balakina A
Published: March 2020

World spread globalization is a continuously process which necessitate growing of big cities with prospering metropolises and the process of emptiness small cities and countryside. The problem of the extinction of the Russian countryside is one of the acute social and economic problems of modern Russia. What is more, according to The World Bank’s data, the tendency of the decrease in the share of the rural population is also relevant for countries of Europe and the USA. Likewise, in Russia, for 8 years from 2002 to 2010 the number of abandoned villages had rocketed from 13 to 19.5 thousand. Hence, amount of abandoned rural cultural heritage properties, such as country estates, churches, graveyards is continuously increasing. The paper analyses the ways of how the implementation of modern business models for the above obsolete properties can contribute to the regeneration of rural settlements. Moreover, the research reports the driving forces of the regeneration, barriers, risk and opportunities given by the shift to new governance model as an aspect of sustainable development.
Classification of Devices of Protection of Linear Objects of Power Supply Against Dangerous Electromagnetic Influences on the Basis of Grounding with Distributed Parameters
Authors: Kopay I G
Published: March 2020

In article it is offered results of the analysis of statistics of failures of devices and the systems of railway automatic equipment because of storm influences. Systematization of the main types used on railway transport of the grounding devices is given.
The Features of Zonning of Krasnoyarsk Agglomeration
Authors: Dorofeeva L , Ligaeva N
Published: March 2020

From experiences of agglomeration in developed countries we can select a few characteristics: advance increase of urban population and overtaking in suburban and rural areas; development of agglomeration based on specialization; using the progress in scientific and technological advances and in social technology; investment support and planning of territory. The system of territorial planning was changed in connection with transition to market economy in Russia. In this case more perspective and investment attractive cities become a center with concentration of industry, business and economically active population. Consequently in these centers was formed a multifunctional territory. Strategy of formation agglomeration in Russia is favor to division of city functions and suburban area and suburban settlements. The main prerequisites to formation agglomeration are: development business and market infrastructure; creation and reconstruction existent sectors of specialization; changing norm of urban planning and development territory; optimization of industry, provision of the necessary facilities for citizens and improvement of ecological environment. This article shows a prerequisites and features of formation agglomerations in Siberia. Research pointed at: explanation of creation interconnection system of industry and settlement in the east part of Russia; mark out urban territories in this system; construction zoning of territory with functional and planning complexes; assessment of backbone and super structural factors. Object of research is Krasnoyarsk agglomeration (project of Large Krasnoyarsk), which in develop now.
Model Analysis for Identifying the Load-Bearing Capacity and Fire Resistance of the Reinforced Concrete Column
Authors: Ilyin N A , Panfilov D A , Mordovsky S S
Published: March 2020

In this paper a new technical solution in construction industry is presented, that relates in particular to testing compressed reinforced concrete elements - the building’s columns - for strength, stability and fire resistance, using scaled models. The subject matter is increasing the informative value, visual clarity and depth of experimental research of columns, using an economical technique of designing the geometric and force similarity of the reinforced concrete column’s scaled model for analyzing load-bearing capacity: strength, stability and fire resistance. The technical result is to identify the reinforced concrete column’s actual operation and its stress state from the beginning of the test and up to the stage of destruction; to evaluate the reinforced concrete column’s limit state according to its load-bearing capacity and fire resistance; to develop the analytical model for calculating the actual fire resistance limit; to save the labor costs for manufacturing the scaled test model of the real structure.
Specifics of the Implementation of Architectural and Urban Utopias in the Large Regional Center of Russia (on the Example of Samara)
Authors: Adonina A V , Akhmedova E A
Published: March 2020

The article is devoted to the problem of implementing the idea in architecture and urban planning. Historically, the construction of exemplary models of life was left to the utopian genre, as evidenced by countless models of ideal forms of social structure. Any urban development project explicitly or implicitly contains an element of utopia, the proportion of which varies depending on the goals and objectives of a specific example. In the presented study, for the first time in architectural scientific discourse, a set of key factors is formulated that determines the feasibility of a utopian model in non-capital cities of Russia. Since the large regional centers of Russia have a cultural, natural, mental and historical identity, they can become an experimental sites for testing the modern urban development strategy. On the example of the development of the city of Samara, a large regional center of Russia, the main causes are identified, and also features of the implementation of architectural and urban utopias are revealed. Chronologically, the study includes historical, industrial, and post-industrial periods. As a result of the study, a forecast is given on the application of modern urban planning concepts in Samara. The proposed conclusions can be recommended for further use in the conditions of the Samara region, and if adapted, for use in other regions of the country.
Reconstruction of Bearing Roof Trusses an Industrial Building without Interrupting the Production Process
Authors: Voronkova G V , Rekunov S S , Dushko O V
Published: March 2020

The main stages of the reconstruction of the supporting metal truss at the operating industrial enterprise are considered. Reconstruction is due to the need of changing the process. An original solution was proposed to change the design scheme of the truss due to the rearrangement of the lower belt. Main features of this reconstruction are the difficulties caused by limited working space and the implementation of all types of work without stopping the process. The stress-strain state of the farm is investigated at various stages of work: the actual state at the time of the technical survey, during the work period and after all types of reconstruction work have been completed. The article provides technological solutions for the preparation of the working platform, the organization of assemblies, and the installation of structures. Each stage of the reconstruction was controlled by performing various types of calibration calculations. The distribution of internal efforts in the elements of the farm is shown before and after its installation in the working position. Additionally, the behavior of the design of the farm on various possible operational impacts is investigated.
Stochastic Process Simulation of Soil Displacement in Calculations of Seismic Resistant Buildings
Authors: Pshenichkina V A , Rekunov S S , Bazhenov R I
Published: March 2020

The solution to the problem of finding the statistical characteristics for a random process of seismic displacement of the foundation soil is given. Analytical methods of the theory of random functions and the method of statistical tests are used. The initial data for solving this problem are the characteristics of the random process of accelerating the soil of the base. The preliminary adjustment of the original accelerogram used for the subsequent calculation is shown. The implementations (accelerogram and seismogram) of the considered processes are constructed for two types of spectral acceleration densities in the form of a polyextreme function and an averaged function with one extreme. The obtained results are intended for carrying out probabilistic calculations of seismic resistant buildings as nonlinear systems and assessing their level of reliability
Landscape Planning as a Basis for Sustainable Development of a Region (Simferopol Region and the Town of Simferopol, Republic of the Crimea Taken as an Example)
Authors: Petlukova E A , Tabunshchik V A , Zelentsova M G
Published: March 2020

This research deals with the theoretical principles of landscape planning. The possibility for applying geographical information systems (GIS) to carry out landscape planning on different levels has been studied. Geographical informational systems (GIS) can be used on every stage of planning work and they provide processing and analyzing a great amount of spatial data about natural components, submission and dissemination of the results by plotting the maps, their typing as well as distributing over on-line resources. The chart of landscape planning with its application has been worked out. The main stages of the research include: spade-work\ preliminary (data collection and information storage, alongside with cartographic, informational, statistical data), examining the territory and its environment, considering the landscape features of the territory. Geographic information system data can help to make up landscape planning of the territory of Simferopol region and the town of Simferopol of the Republic of the Crimea. During this stage of landscape planning a set of maps i.e. maps of natural and economic landscape subsystems, adverse natural processes, ecological network, landscape and ecological restrictions has been plotted. By reference to all maps for the territory of Simferopol region, the map for landscape planning as well as functional zoning of territory have been worked out. According to the received data, measures against adverse processes have been planned.
Numerical Modeling of Comfort Parameters for Spectators in Large Concert Halls
Authors: Egorov K S , Novitskiy B B , Malastowski N S , Kolosov M A , Stepanova L V
Published: March 2020

The numerical modelling of spectators and performers’ comfort in large concert halls was considered. The research shows that numerical modeling of air velocity and temperature helps to make a justified choice of technical solutions for ventilation and air conditioning systems and to examine their operation under extreme mode of service as well.
Features of Urbanization: Formation and Development of Krasnoyarsk Agglomeration
Authors: Usmanova I H , Ligaeva N A , Kuznetsova O A
Published: March 2020

The article deals with the features of the urbanization process, taking as an example the Krasnoyarsk agglomeration formation, the purpose of which is to increase the efficiency of the economic, social and cultural development of Krasnoyarsk Krai. Urbanization is here presented as a global process, contributing to the development of urban agglomerations within the concept of sustainable development of the regions. The article also analyzes the territorial structure of the Krasnoyarsk agglomeration, taking into consederation modern demographic processes. The study is based on a wide range of scientific sources, socioeconomic statistics from 2008-2018 and analytical methods.

An analysis concluded that one of the main directions of the Russian Federation spatial development is the creation of the large agglomerations, that are centers of socioeconomic development of the regions. The Krasnoyarsk agglomeration formation and development takes place against the background of the concentration of production and the prevailing intraregional mechanical population influx with a persisting interregional population outflow.