bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analytical assessment of social, environmental and economic indicators for the balanced development of the economy of the region
Authors: Bezrukova T L , Larionov V G , Kuksova I V 
Published: November 2019

Abstract
The article suggests an analytical evaluation of social, environmental and economic balanced development of the regional economy on the example of the Voronezh region. The assessment is based on a correlation analysis of indicators. The calculation of correlation coefficients revealed similarity and direction of the relationship of the studied parameters. Analytical assessment reflects the interrelation of indicators in the three main components of the regional economic sectors (economy, nature and society). Any development of economic activity causes significant harm to the environment by emissions of harmful substances into the atmosphere, discharges of polluted effluents into surface water bodies, formation of a huge amount of production and consumption waste. The measure of this impact are different in their strength, as well as the magnitude of the applied social, environmental and economic damage to the environment in different periods of economic development of the countries. The process of innovative development in production creation of new materials and other fields, (as well as any technogenic impact) can cause a negative, adverse impact on the environment. Environment protection becomes one of the priority tasks of modern eco-oriented economic development. This assessment can be further used in regional management to diagnose the current situation, identify cause and affect relationships between indicators and predict the parameters of balanced development.
Transformation of the structure of the timber industry complex on the path to new industrialization
Authors: Kirillova S S , Borisov A N , Bezrukov B A 
Published: November 2019

Abstract
The article shows a study to assess the structure of the timber industry complex of Russia in the pioneering days of a new industrialization. It is a radically new stage of scientific and technological progress that has no historical analogues in the degree of influence on human civilization. New industrial technologies, possessing enormous potential for changing the direction of technological development, at the same time have ambiguous social and environmental consequences. The timber industry complex is one of the most important and interesting objects for research, since the products of the industry are distributed throughout the world and play an important role for the economies of all countries. In developed countries, the forest industry complex accounts for about 10% of the total industrial production. Wood is an important type of raw material. Even considering the competition from new technologies and materials, the proportion in the structure of the global gross domestic product is almost not reduced. The fundamental problem of assessing and predicting the effects of new industrialization based on technological transformation using quantitative indicators forms the need to create a multisigmoidal innovation cycle for changing the structure: from obtaining new fundamental knowledge to their practical use.
Production of compressed wood with target quality indicators from different parts of tree trunk
Authors: Platonov A D , Snegireva S N , Stepanova Yu N , Bryndina L V 
Published: November 2019

Abstract
Wood species has great influence on the service life and quality of compressed wood. Currently, the industry lacks high-quality wood, so one of the solutions to this problem is the possibility of expanding the species composition used for the manufacture of compressed wood. The predominant group of species is soft hardwoods. It is advisable to use birch wood for the production of compressed wood. This conclusion is made on the bases of wood species stock and its physical and mechanical properties. Information on the nature of raw materials is needed to implement the pressing wood technology. Wood is a biological material whose properties change in the tree trunk. Changes in moisture content and wood density in the height of the tree trunk have been studied. The necessary degree of pressing has been determined on the basis of these data. It takes into account the required final density of compressed wood. Initial thickness of the specimens has also been calculated. This has made it possible to obtain a uniform density of compressed wood. It also reduces raw material consumption, taking into account from what part of the tree trunk the wood was taken.
Bioecological aspects of plantation nut cultivation of Siberian cedar (Pinus sibirica du tour.) in Russia
Authors: Titov E V 
Published: November 2019

Abstract
The conditions for obtaining the maximum gross yield of pine nuts on the grafting plantations have been considered. Nut production plantations are created in the most productive vegetative conditions (not lower than II-III quality class). The selection of areas was carried out on the basis of forest vegetation zoning, bioecological properties and climatic conditions. First of all, plantations are laid in the zone of ecological optimum, outside the natural range (zone of coniferous-deciduous forests of the European part of Russia). Valuable clone genotypes of Siberian cedar for seed and pollen productivity have been selected on graft plantations and in the archives of plus tree clones. Mixing of clones is carried out taking into account the reproductive differentiation of genotypes, providing a biologically possible output of full-grain seeds from the cone. Clones of various reproductive types and seed productivity are placed on the plantation in the absence of natural sources of pollination. Dates of flowering and pollen dispersion must be the same. The distance between the trees should ensure the yield increase with full crowns for at least 50-80 years. Maximum distance between high-yielding grafts and pollinating grafts is not more than 15 m.
Research on Stress-Strain State in the Angular Domain Cut-Out Zone Using Photoelastic Method
Authors: Frishter Ludmila 
Published: November 2019

Abstract
Current challenges in civil engineering practice call for creating and substantiating structural theory research approaches that correlate with the objects, processes and phenomena under study (physical models) to the fullest possible extent, and that provide reliable results for tackling engineering challenges. The topicality of this paper is associated with the choice of research method, i.e. the experimental photoelastic method. This method allows to obtain the local stress-strain state with the highest reliability when solving problems with specified rupturing forced deformations in the domain of significant structural non-homogeneity, i.e. geometrical stress concentrators. Boundary shape and finite discontinuity of specified forced deformations translate into emerging singularity of stress-strain state. The research aim consists in theoretical and experimental analysis of the stress-strain state in neighborhood of irregular point on the boundary of plane domain which the finite discontinuity (jump) of forced deformations emerges into. The singularities of strain-stress state of structures and constructions that are characterized by “structural non-homogeneity” and rupturing forced deformations are determined using polymer models of the photoelastic and deformation freezing method as stress concentrators whose domains are the focus of this article. Research results demonstrate that a zone of stress-strain state similarity exists in the domain of stress concentration under the action of rupturing forced deformations. This is confirmed by the similarity of experimental data. A formula for experimental data extrapolation is proposed that helps restore band orders in the domain of elasticity problem singular solution where isochromatics on the photoelastic method polymer model are unreadable or “poorly” readable.
Degradation of Dynamic Parameters of Reinforced Concrete Buildings during an Earthquake
Authors: Mkrtychev Oleg 
Published: November 2019

Abstract
The article presents the results of a numerical study of the effect of local damage to load-bearing structures on the dynamic characteristics during an earthquake. The studies were carried out in the LS-DYNA software package, which implemented the nonlinear concrete model, Continuous Surface Cap Model (CSCM). The computational model of the building uses solid finite elements for concrete and bar elements for reinforcing bars. As the object of modelling, a 1-storey building with a frame structural layout was chosen. Studies have shown that during an earthquake with an intensity of 7 points, specified by the corresponding accelerogram, there is no change in natural frequencies, that is, the damage resulting from this earthquake is insignificant. During an earthquake with an intensity of 8 points, a significant (up to 55 %) reduction in natural frequencies occurs. This suggests that the structure is damaged, and the overall stiffness of the building is reduced. Analysis of the results shows that the most intense decrease in natural frequencies occurs in the active phase of an earthquake. After the end of the active phase, the frequencies stabilize and stop falling. The LS-DYNA software package enables to perform studies of the effect of local damage of the load-bearing structures on the dynamic characteristics during an earthquake with the direct reinforcement of concrete with reinforcing bars and can be used in the calculations and the design of buildings and structures.
Rock Specimens Destruction Regularities under Uniaxial Compression
Authors: Makeeva Tamara , Trofimov Vitaly 
Published: November 2019

Abstract
Modern approach to the stress-strain state assessment of a mining structure design, especially when it is non-linearly deformed and areas of local destruction appear, should be based on the principle of step-by-step loading in the form of small increments of the loading factor. At each such step, due to fracture, the deformation properties of the materials composing the region change, forming a generally non-uniform and, possibly, non-linear deformation medium. The modelling results of the rock massif state within this approach may differ significantly from the results for one-step loading, which is usually used in researches.
The article discusses the use of an iterative process of loading and destruction as applied to the simplest design, namely, for one-dimensional loading of a homogeneous rock specimen. It is shown that under the “rigid” loading conditions, the described approach makes it possible to simulate the characteristic features of damage localization in the sample and the nonlinear nature of the deformation as a whole, including post failure deformation.
Way of Simulating of Seismic Impacts on Building and Structures
Authors: Abovyan Avetik 
Published: November 2019

Abstract
The article includes the method of simulating of seismic impact to structures by system of vibration directional machines. Essence of the method concludes in reproducing of powerful vibrating machines in the different stores of the structure where oscillation characteristics are selected based on the spectrum of acceleration of the earthquake and so that the values of the inertial forces arising in the structure during their operation are equal to the true values of seismic forces which arise during the same earthquake. The offered method gives an opportunity for modeling of the stress-strain stain of the structure is taking place during the earthquakes without moving its foundation.
Stress-strain state of a reinforced stepped bimodular column
Authors: Beskopylny Alexey , Kadomtseva Elena , Strelnikov Grigory , Shabanov Yaroslav 
Published: November 2019

Abstract
The article discusses the reinforced stepped column under the action of forces applied along its axis. The column is clamped at the ends and made of a bimodular material, that is, a material having different elastic moduli in tension and compression. Formulas for normal stresses are obtained, depending on the mechanical characteristics of the column material, the geometrical values of the column, and the reinforcement bars. Numerical calculations were carried out for a column made of fibro-foam concrete, in which the elastic modulus of tensile strength is greater than the elastic modulus of compression. The influence of different modulus of the material on the stressed state of the column in the compressed and stretched parts was investigated. The graphs of the normal stresses as a function of the number of reinforcement bars of the stretched zone with a constant number of reinforcement bars in the compressed zone with and without bimodularity are given. It is shown that in some cases normal tensile stresses without bimodularity are 46% less than with bimodularity, and compressive normal stresses are 29% more than with bimodularity.
Rectangular Section Model for Analysis of the Resistance of Eccentrically Compressed Masonry Structures
Authors: Lechman Marek 
Published: November 2019

Abstract
The paper presents section model for analysis of the resistance of masonry structures with rectangle cross-section subjected to the eccentric compression. The nonlinear stress-strain relationship for masonry in compression is assumed taking into account the effect of masonry softening. The formulae for normalized ultimate axial force and nmu
and bending moment mmu
are derived in the analytical form by integrating the cross-sectional equilibrium equations. The calculated results are presented in the form of interaction diagrams and compared with those based on the parabola-rectangle diagram for masonry in compression. It has been shown that the section resistance is strongly influenced by the masonry softening and depends on the limiting value εmu
for masonry in compression.
Dynamics of Structural Materials Destruction - The Initial Stage
Authors: Vasileva Olga 
Published: November 2019

Abstract
We consider a mathematical model of the initial stage of the process of destruction of structural material. The mathematical model is the initial boundary value problem for the system of four partial differential equations of the fourth order. This is a system of equations for functions of the temperature, the velocity, the enthalpy and the destruction parameter. For the different values of parameters, the results of numerical investigation of temporal cross-sections of all dimensionless variables are presented and discussed.
Discrete-Continual Finite Element Method for Semianalytical Analysis of Plates on Two-Parameter Elastic Foundation. Part 2: Discrete-Continual Formulation of the Problem, Numerical Samples
Authors: Mozgaleva Marina L. , Aslami Mojtaba , Akimov Pavel A. 
Published: November 2019

Abstract
This paper is devoted to application of discrete-continual finite element method (DCFEM) for semianalytical solution of problems of analysis of plates on two-parameter elastic foundation. Corresponding resultant multipoint boundary problem for system of ordinary differential equations of the first order with piecewise-constant coefficients is presented. Numerous samples of problems of structural mechanics have been considered. These samples allow demonstration of some advantages of application of the suggested approach to semianalytical analysis of plates on elastic foundation.
Attempt to Assess the Scope of Applicability of a Hyperelastic Murnaghan’s Material Model in the Case of Elastomers
Authors: Jemiolo Stanislaw , Franus Aleksander , Domanski Wlodzimierz 
Published: November 2019

Abstract
In this work, we use the MCMV slightly compressible hyperelastic constitutive model of rubber-like materials that was proposed in the authors’ work and implemented in the MES ABAQUS / Standard program. The stored energy function of the MCMV model is approximated by polynomials relative to the Lagrange strain tensor, attempting to evaluate the scope of applicability of Murnaghan’s models in the boundary-value problem of statics. We analyze in detail the homogeneous deformation problems. The point is to determine the approximate range of deformation, in which we get similar results of the problems mentioned, using the MCMV material model and its approximation.
Yield Criterion for Concrete Formed From the Deviatoric and Meridional Shape Functions
Authors: Szwed Aleksander 
Published: November 2019

Abstract
Design of yield criterion for concrete using the deviatoric and meridional section shape functions is presented. For the deviatoric section, Podgórski type shape functions are applied and discussed, while for the meridians Cassini’s oval is considered. Derivation of the shape functions with determination of free parameters using typical experimental test is shown. Comparison with empirical data for concrete is given. The proposed approach is a quite general tool in development of failure criteria for frictional and brittle materials.
Influence of Chloride Corrosion on Probabilistic Assessment of Bearing Capacity of Beamless Slabs Overlap
Authors: Tamrazyan Ashot G. , Mineev Michael S. , Zhukova Lyudmila I. 
Published: November 2019

Abstract
The impact of aggressive environment on reinforced concrete beamless slabs leads to corrosion in the structure. This significantly affects the safety, durability and usability of buildings and structures. The bearing capacity of the construction of the beamless slab decreases with time. The more corroded the section of reinforcement in concrete, the greater the likelihood that the destruction of the reinforced concrete slab will occur earlier than the maximum service life of the structure. Various states of the design of a beamless slab in time, affecting the reliability of the structure, are considered. The destruction of the protective layer of concrete and the reduction of the diameter of the working reinforcement significantly affect the bearing capacity and reliability of the beamless slab. Reducing the area of working reinforcement and increasing the volume of corrosion products is an important parameter. The model of steel reinforcement weight loss over time is analysed. The dependence of the increase in the weight of corrosion products over time is revealed, and it is calculated that after 35 years with a complete loss of the thickness of the protective layer of concrete in the structure, the weight of the corrosion products will be 15% of the total mass of steel reinforcement. According to the results of the calculation, it was obtained that during the operation of a reinforced concrete beamless slab in a slightly aggressive environment under chloride corrosion, destruction will occur after 38 years if measures are not taken to inspect and repair it. These values are used for a probabilistic assessment of the effect of corrosion on the bearing capacity of the structure data.
Technology of Manufacturing Connections on Steel Rods Glued into Wood
Authors: Ospanova Zhumabike , Aruova Liazat , Dauzhanov Nabi , Alibekova Nurgul , Gordienko Boris 
Published: November 2019

Abstract
In modern construction, glued wood is used mainly by Scandinavian countries, Canada, the USA and Russia. It is rational to use glued wood not only in low-rise housing construction, but also as supporting and protecting structures of large-span public buildings. Large-span glued wooden structures have become popular in modern construction and are widely used for public buildings with spans of 18 meters or more. In the practice of building Western countries with significant reserves of wood, sports facilities, exhibition halls, cinemas and other entertainment buildings are being built from glued wood. According to the condition of transportation, a lengthy beam, frame or truss must be made of two or three elements, and then connected at the construction site into a single structure. The use of mechanical fasteners in the form of bolts is not always possible due to significant compliance, including due to thermal expansion of the metal in a harshly continental climate, for example, in Kazakhstan and under fire safety conditions, when metal parts quickly lose their bearing capacity. Significant deformations occurring in the nodes can cause a redistribution of forces in the elements and as a result lead to the destruction of the structure. To create a durable rigid joint of glued wood constructions, the joints on the reinforcing rods glued under the inclinations to the fibers are used, which, as practice shows, ensure high reliability, durability and low compliance. This article discusses the technology of gluing reinforcing rods into wood to solve large-span structures and their welding. On the basis of experimental scientific studies, the sequence of the necessary technological processes for obtaining a durable, reliable and high-quality glue joint between the rod and wood and the possibility of welding the reinforcing rods glued to the wood with a connecting piece are shown. In this study, various variants of the joints of maple structures, where it is possible to use the welding of its elements, are carried out.
Studies of Structures of Gates in Hydraulic Engineering
Authors: Balzannikov Mikhail 
Published: November 2019

Abstract
The article reveals the complex nature of the gates provided in water discharge installations of hydropower units to adjust the flow of water into the downstream bay. There are strict requirements for their reliable and safe work, for gaining the complete culvert closure and allowing passing a calculated water flow during the flood period. In order to more efficiently implement these requirements, technical solutions on the improvement of the shutters’ design are constantly developed. The results of studies of such new structures are given. The task of the present research is to identify the most common approaches to shutter improvement. In the result of the study, the following most widespread methods of improving shutters design are identified: 1) development of efficient geometric forms of shutters and their parts; 2) development of efficient design of the auxiliary elements of shuttering devices; 3) increase of dynamism degree for the structural elements of the shutter; 4) parts size reduction, repeated use of smaller elements. Examples of these methods are provided. The results of this research are recommended for use at practical activities to further improve the gate of hydraulic structures.
Innovative Technologies in Construction Sector that Meet Criteria of Sustainable Development
Authors: Weglarz Arkadiusz , Gilewski Pawel 
Published: November 2019

Abstract
In the changing world, the construction sector undergoes significant changes. New innovative technologies must be introduced, so this sector meets the requirements of sustainable development. In this article, we provide a comprehensive overview of various aspects of methods and techniques that when applied help to achieve the ambitious goals in terms of sustainability. Those aspects are methods applied to the support the design process of buildings, innovative building materials, modern installation systems, building management systems, and systems for managing the process of building operation.