bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

AbstractAuthors 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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.