bluuebunny/crossref_metadata_2025_split huggingface dataset:
Features of Functioning of the Combined Air Heating Systems and Ventilation of a Three-story Museum
Authors: Sargsyan S , Borisova V 
Published: March 2020

Abstract
The analysis of the air-thermal regime of a three-story experimental residential museum building with a basement floor is presented. The equations of material and energy balances of the investigated building were compiled, allowing to determine the required air temperature at the outlet of the stream from the air-heating chamber. A method for determining the maximum performance of an air heater of a combined air heating and ventilation system at given temperatures of outside air and fresh air at the outlet of the jet from the air distributor is presented. The dependence of the thermal performance of the air heater on the change in the outside air temperature is established, with the same parameters of supply air at the outlet of the air distributors. A method for determining the parameters of supply air at the outlet of the jet from the air distributor, which allows to ensure the necessary parameters of the air inside the heated premises, is proposed. A survey of the temperature and humidity of the microclimate in the premises of the building, allows us to estimate the sanitary and hygienic conditions. A method for the simultaneous application of the processes of humidification and heating of the supply air in the combined air heating and ventilation system providing the specified microclimate parameters in the premises of the building under study is proposed.
On Influence of the Height of Heated Room on the Heat Transfer of the Heating Device
Authors: Sargsyan S , Borisova V 
Published: March 2020

Abstract
The analysis of the functioning of the heating device in a heated room. The methods of testing the heating device to determine the nominal heat flow in the isothermal test chamber are presented. Presents a methodology of thermal calculation of the heating device for identifying the type of a collapsible radiator and convector, with an area of heating surface for the transmission of heat not less than that required for the heat flux in the room or the number of partitions portable radiator. It is shown that the heat transfer coefficient of the heating device is influenced by the average temperature head, the amount of coolant flowing through it, atmospheric pressure and the method of connecting the device to the heating system. The process of heat transfer from the coolant in the heating device to the heated room is analyzed. A laboratory study was conducted to determine the effect of the height of the heated room on the value of the actual heat flow of the heating device. It is established that the amount of actual heat flow from the heating device depends, among other things, on the space-planning solution of the heated room (the height of the heated room).
Reducing Risks in Construction Using Innovative Technologies
Authors: Merzliakov R , Reshetkina E 
Published: March 2020

Abstract
The Construction is an activity with a heightened level of risks, arising, of course, at all stages of the life cycle of an object. The main focus of the research is to reduce the risks associated with the construction at each of its stages using innovative technologies.
Risks that can be reduced or eliminated altogether using innovative technologies, namely building information modeling (BIM), deserve close attention. The purpose of the study is to search or design methods for reducing risks in construction at all stages.
BIM-technologies allow reducing risks during construction at its three stages: design, construction and installation, operation (sometimes recycling). The results of the research on risk reduction in construction using innovative technologies are information modeling technologies that minimize the possibility of human error, accompany the smooth and productive work on the construction site, and also allow you to maximally use the already constructed facility without loss.
Problems of Energy Efficiency of Residential Buildings
Authors: Zhigulina A Y , Ponomarenko A M , Borodacheva E N 
Published: March 2020

Abstract
The article is devoted to the analysis of trends and advanced technologies in the field of energy supply and energy efficiency of residential buildings. The evolution of the concept of “energy saving” in the concept of “energy efficiency” and its current interpretation are considered. The difference between the evaluation criteria of the world’s leading rating systems LEED and BREEAM is shown. Considered the latest technology used in the construction of high-rise energy-efficient buildings. An innovative approach to the design of energy-efficient residential buildings should include, along with energy saving, various methods of producing and storing alternative energy through the use of solar and wind energy using special technical devices, the use of “green” construction technologies.
Methodological Approaches to the Development of Public Spaces in Accordance with the Concept of Sustainable Development
Authors: Kurakova O 
Published: March 2020

Abstract
The issue of urban area efficient use is one of the top-priority issues in planning public space development projects. The current trend is that public spaces and parks play an important role in increasing the attractiveness of cities as a whole and, in particular, individual city blocks and directly affect the quality of human life. Within the framework of Russian Federation priority national project “Formation of a comfortable urban environment” it is planned to carry out measures to improve municipal unit territories of the corresponding functional purpose (squares, embankments, streets, pedestrian areas, garden squares, parks, other territories). To implement this project, it is important to create a mechanism to increase the investment attractiveness of projects for the development of public spaces, as well as identify criteria for the selection of such projects. Within the framework of this article an attempt is made to classify the criteria that must be taken into account when developing public space development projects based on the concept of sustainable development. An algorithm for evaluating the criteria and parameters that would allow assessing the attractiveness of the territory for the implementation of the project for public space development is also given. The article also formulates the main areas of scientific research that would provide a more competent approach to the processes of urban planning and would help to formulate mechanisms for attracting investments in public space development projects, since these are not only of city-planning significance, but can also ensure social integration and support intercultural communication.
“Green Roof” as an Effective Landscape-Ecological Tool for Solving Modern Urban Ecological Problems
Authors: Stetsenko S E , Yastrebova N A , Eterevskaya I N 
Published: March 2020

Abstract
Global warming, the ever-increasing compaction of buildings, waste heat from domestic heating, industry and transport leads to overheating of urban areas. An effective solution for improving the quality of the urban environment should be considered the device of “green roofs”, allowing the city to be discharged from overheating and dustiness in the summer.
The main indicators of the “green roof” that improve the quality of the urban environment include: enriching the urban atmosphere with oxygen, reducing overheating of buildings and urban areas, managing rainwater, reducing the dust content in the city’s atmosphere, reducing the noise level inside the building and reducing sound reflections on the roof, shielding of electromagnetic radiation, an increase in the surface area of the urban environment, suitable for the habitat of representatives of urban fauna.
Large shopping centers, due to their significant areas occupied in the structure of cities, should be considered as potentially active sites affecting the microclimatic parameters of adjacent urban areas. Thanks to the installation of sheds with “green roofs” above the parking areas, it is possible to reduce the anthropogenic load from excessive “sealed” areas, overheating, dust and gas pollution. The high rates of the number of large shopping centers in the structure of cities suggest that the ecologically sound landscape - town planning organization of shopping complexes can be a successful tool for the improvement of the urban environment.
Foreign and Domestic Experience in Environmental Planning and Territory Management
Authors: Pupentsova S V , Alekseeva N S , Stroganova O A 
Published: March 2020

Abstract
The given article considers the causes of the emergence of territories in need of environmental planning and management worldwide. The ways of development of industrial territories in historical areas of cities are presented. It is shown that environmental planning and territory management contribute to the improvement of the quality of life, the development of new kinds of activities, the solution of transport and environmental problems. The experience of Great Britain, Germany, the USA and Russia is analyzed and examples of environmental planning and territorial management projects are presented. The article considers the cases of reorganizing the former industrial buildings and territories and creating residential complexes, shopping centres, museums, exhibition spaces, coworking, sports facilities, recreational spaces and leisure centres in them. Both successful redevelopment projects and those the implementation of which has been discontinued are identified. The release of the city’s territories from industrial facilities is considered to be the most important task of forming the urban environment, since the existing location of industry does not correspond to the tasks of developing urban infrastructure and worsens the ecological condition of the city
The Use of Effective Design Solutions and High-Tech Building Materials for Reconstructing Residential Buildings of Mass Development in 1960-1990
Authors: Absimetov V E , Solovev D B 
Published: March 2020

Abstract
In connection with the mass development of large-panel typical buildings, in solving the problem of housing for millions of people in the country, they were supposed to be limited in use for 50-60 years. However, the solution to this problem occurs mainly in Moscow, since significant investments are required to resolve the issue of demolition, relocation of residents and the construction of new buildings on the site of the demolished ones. A method of reconstruction of these objects is proposed with the solution of the issues of thermal modernization of facades and improvement of sanitary and hygienic living conditions, with the involvement of investors without the use of budgetary funds [1].
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.