bluuebunny/crossref_metadata_2025_split huggingface dataset:
Deformation of intermediate zones of two-layers elements of reinforced concrete structures
Authors: Fedorova N V , Gubanova M S , Savin S Yu 
Published: January 2020

Abstract
Analytical dependences are constructed for a characteristic reinforced concrete element simulating inter-medium contact zones with simultaneously occurring processes of changing the long-term strength of concrete in time, taking into account the aging process of concrete and the process of neutralizing concrete with an aggressive environment. The proposed version of the calculation model of the long-term deformation of a corrosion-damaged composite reinforced concrete element in the zone of contact of two concretes makes it possible to study the deformed state of such structures in a plane stress state.
Possibilities and limitations of high-strength lightweight fiber-reinforced concrete structures
Authors: Duong T Q , Vu N T , Inozemtcev A S , Korolev E V 
Published: January 2020

Abstract
The paper shows the study of the possibilities, limitations in the design of structures made of high-strength lightweight fiber-reinforced concrete and its use in the construction of a high-rise building using the LIRA SAPR software package. The calculations of the finite-element spatial model show that compared to heavy concrete, using high-strength lightweight fiber-reinforced concrete in the multi-storey buildings construction provides a large number of advantages, such as: reducing deflection of the building from its own weight up to 44.0%, from effect to wind loads - by 2,4 … 2.6% with a decrease in the period of the first 3 vibrations of the building structure by 11.3%; an increase in the number of storeys to 7 floors without changing foundation bearing capacity; increasing specific usable area per 1 m2 of building land by 26.6%; reducing consumption of materials for the foundation while maintaining the number of storeys of the building or the possibility of construction in weak soils. At the same time, the technology of high-strength lightweight fiber-reinforced concrete, combining low average density and high strength, is associated with an increase in the cost of the material, therefore, the existing limitations can be identified: the dependence of economic efficiency on the structural features of a particular building, construction conditions and local resources used for concrete production.
Indicator system for monitoring the development of urban bicycle transport infrastructure
Authors: Kireeva N , Zavialov D , Saginova O , Zavyalova N 
Published: January 2020

Abstract
Based on surveys of bicyclists and the study of foreign practice with regard to monitoring the development of bicycle transport infrastructure, scientists from Plekhanov Russian University of Economics have offered a flexible system of indicators to assess and plan the development of the bicycle transport infrastructure for the city of Moscow.
Analysis of the structures in water treatment and sanitation facilities for their strengthening
Authors: Rimshin V I , Kuzina E S , Shubin I L 
Published: January 2020

Abstract
The destruction of water treatment and wastewater treatment plants occurs under a number of factors, which include: precipitation affects the external parts of structures, moisture penetrates into the body of the structure and beyond it, weather conditions: variable temperatures, weathering, biological effects, ultraviolet radiation lead to destruction any building material. The main reasons of destruction and damage to building structures in various water treatment and wastewater disposal facilities are discussed, the most effective ways for eliminating these damages are provided in this article. The calculation substantiation of the supporting structures reinforcement namely reinforced concrete slabs in water treatment structures is carried out.
Study of impact sheet pile and Franki NG pile driving on weir construction
Authors: Wyjadłowski M , Sawicki E 
Published: January 2020

Abstract
The proper quality and the safe execution of geotechnical works imposes the necessity of monitoring techniques to prevent the threats arising from the vibrations. This work presents authors experience gained during sheet piling and Franki pile driving in time of construction of water power plant. Dynamic impact of foundation works can be perceptible by humans and can affect structures and technical devices. The immediate reason for the dynamic analysis was the occurrence of clearly perceivable vibration of the weir. The measurements were performed during sheet wall installation and Franki pile driving at various measuring points. Wave parameter measurements and recording of shocks and vibrations in the close vicinity of the construction site were juxtaposed for different installation phases and measuring points. A comparison of the two technologies shows that the largest vibrations occur during formation of the cast-in-situ (over)expanded Franki pile base. Sheet pile wall installation supported by additional processes such as pre-boring turned out to be as less harmful.
Development of the methodology of calendar planning in the system of organizational and technological preparation of capital repair of multi-apartment residential houses
Authors: Korol O A 
Published: January 2020

Abstract
The features of the repair and construction work during the overhaul of buildings are reflected in the development of organizational and technological design documents, which include calendar plans. Organizational and technological models represent the basis for the development and calculation of calendar plans, as well as for determining resource requirements. They for prevention works, the order of their implementation, the nature of the relationship between individual works, reflecting the specifics of the selected technology for the production of work and the features of the simulated object. The scheduling of overhaul works is carried out on the basis of the developed methodology, which allows obtaining rational organizational and technological solutions with a low level of certainty of the initial information. To evaluate the final set of alternative options for calendar plans and choose the best option in accordance with the described methodology, it is recommended to use quasi metric methods. This allows us to lay the foundation for the rhythmic and coordinated work of all units involved in overhaul at the stage of scheduling, as well as to keep track of the possibility of ensuring timely completion of the planned work.
BIM and QR-codes interaction on a construction site
Authors: Vasilyev R S , Losev K Y , Cheprasov A G , Bektash D T 
Published: January 2020

Abstract
The study presents the methods of construction site Quick Response Code (QR) codes implementation and gives suggestions to improve routine construction site tasks management. QR-code exchange data technologies are integrated into construction control system based on BIM providing availability of data, security and mutual cooperation on a construction site. The task of the study was to present Internet of Things (IoT) integration solution scheme, a mobile integration for data exchange system via QR-codes, using smartphones to scan and upload data about construction processes, and use “smart scanners” to process and print these codes as tags. These tags are to be attached to construction elements and equipment. It allows to control staff, machine and mechanisms movement, as well as follow up the stages of construction process. As a result, the statistics and advantages of working with smartphones over computers were considered. IoT integration solution scheme is presented. Except basic identification information BIM/QR-code subsystem should contain additional data associated with the Quality Management System (QMS) “quality records” on construction site. The scheme could be used as the basis of Enterprise Resource Planning (ERP) system together with construction control system and QMS within the IoT concept.
Crack resistance criterion of plane stress RC elements with prestressed reinforcement
Authors: Kolchunov V I , Iliushchenko T A 
Published: January 2020

Abstract
An analytical condition for crack resistance of a specific plane stress reinforced concrete element with prestressed reinforcement is considered in this article. The specific concrete element is reinforced with orthogonally located prestressed rods that coincide with the directions of the coordinate axes. The crack resistance condition is constructed by generalizing of G.A. Geniev theory of plasticity of concrete and reinforced concrete on the region of existence of tensile stresses: “tension-tension” and “compression-tension”. A graphical interpretation of this condition is presented for a plane stressed element depending on the angle between the main force and the coordinate axes. As an example, the crack resistance condition of the support zone of a prestressed concrete beam of a monolithic reinforced concrete frame is considered.
Manufacturing of the Oloid. CAD/CAM Workflow
Authors: Bellido Coope M 
Published: January 2020

Abstract
This paper considers the manufacturing process of the Oloid by means of numerical control machining. Firstly, the requirements of the end part were studied, and it was decided to manufacture the Oloid via gravity die casting, and its necessary mold to be produced by CNC machining. In order to do so, the gating system and mold had to be designed and tested using sand casting methods. When the test results were optimal the die was machined and the part cast. During this process the CAD/CAM workflow was object of observation and study, which allowed for insight and conclusions on the design process.
The properties of certain linear and nonlinear differential equations of the fourth order arising in beam models
Authors: Chichurin A , Filipuk G 
Published: January 2020

Abstract
The purpose of this paper is to present several new results concerning relations between linear differential equations of the fourth order and nonlinear differential equations of the fourth order. These equations are involved in the description of models of building structures, where there are beams with small deflections or curved axes. We consider linear differential equations of the second, the third and the fourth order and nonlinear fourth order differential equations related via the Schwarzian derivative. As a result, we obtain new relations between the solutions of these linear and nonlinear equations. For example, assuming that we know a solution of linear differential equation of the fourth order and a solution of the third order linear differential equation, then the Schwarzian derivative of their ratio solves certain nonlinear differential equation of the fourth order. We also present some conditions on the coefficients when this statement holds. Two more similar statements are presented. To illustrate theorems and our constructive approach we give two examples. The given method may be generalized to differential equations of higher orders.
The analysis of the polymer concrete characteristics by fractional calculus
Authors: Aleroev Temirkhan 
Published: January 2020

Abstract
The paper investigates a second-order differential equation with a fractional derivative in the lower term, in which the order of the fractional derivative is in the range from zero to two and is not known in advance. This model is used to describe oscillatory processes in a viscous medium. A fundamentally new method has been developed for the approximate solution of the first boundary-value problem for the equation of string vibration taking into account friction in a medium with fractal geometry. Considering that polymer concrete is a set of granules of a mineral filler located in a viscous medium, the equation of motion of these granules is derived and investigated. A technique is proposed for studying the motion of granules in a medium with fractal geometry.
Quasi-Static Solution of a Problem of Thermal Shock Acting on a Plate
Authors: Rogacheva Nelly , Suvorov Alexander 
Published: January 2020

Abstract
In most research works related to stress analysis of thin structures subjected to temperature change it is assumed that variability of temperature in time is limited. In classical theory of thermoelastic thin structures the case of strong dynamical effects is excluded from consideration. Under this assumption, from three-dimensional equations of thermoelasticity the equations of thermoelastic plates and shells of Kirchhoff-type are derived. In this paper we focus on the analysis of stress-strain state of a plate in strongly dynamical temperature field, for which the classical Kirchhoff theory is not suitable. The analysis is carried out by a mathematical method without making any hypotheses. A numerical example is considered.
Mathematical calculations of water saving during furrow irrigation of cotton using a screen from an interpolymer complex
Authors: Amanov B T , Gadaev N N , Ahmedjonov D G , Zhaparkulova E 
Published: January 2020

Abstract
This article discusses the mathematical model of furrow irrigation to establish irrigation rates when watering cotton through a screen from an interpolyme complex (IPC) with the addition of mineral fertilizers. By the change in “I” when watering cotton through a surface screen from IPC with the addition of mineral equations, we can say that physically the effect of the screen will affect the amount and rate of infiltration «I» and “ϑI
”, other relations do not change. In the case of placing the screen in the form of a thin film (as experiments show), soil infiltration decreases by approximately 3-3.5 times.
Modelling Fluidic Windows for Heating and Cooling
Authors: Fraaß Mathias , Su Lingqi 
Published: January 2020

Abstract
Recently, we introduced a transparent capillary glass panel fabricated by lamination of a structured glass sheet and a thin glass cover used for liquid circulation. Major applications of such device are room heating and cooling and energy harvesting for heat pumps. In order to model a façade of a building, a story of a building or even the entire building, simplified but accurate models for the temperature and the fluid flow distribution within the capillary panel as well as a device optical and thermal model are necessary. In this paper, our simplified models are introduced.
CFD Methods in Architecture and City Planning
Authors: Valger S A , Fedorova N N 
Published: January 2020

Abstract
The paper provides an overview of CFD solutions for architectural design and urban planning. Aspects of numerical modelling of the aerodynamics of buildings and structures are described. Examples of the influence of turbulence models on flow parameters in the vicinity of buildings, as well as examples of influence of thermal stratification regimes on flow structure around buildings and on concentration of gaseous emissions from low sources in the vicinity of these buildings are considered. The calculation results of aeration of a city micro-district and a scenario for the arrangement of green areas to change the wind regime of the territory with the already existing development are demonstrated in the paper.
A complexly method of GIS technologies and models used in the development of environmentally modes of hydraulic and hydropower facilities in Uzbekistan
Authors: Mukhammadiev M. , Nasrulin A. , Mukolyants A. , Ergasheva D. 
Published: January 2020

Abstract
In this article we consider the results of studying the problems and prospects of using information technologies to ensure the introduction of new innovative approaches in hydroecology and hydropower, the creation of GIS (GIS-geographic information systems) for hydroecological and hydro-technical monitoring, and also as a visual material for students studying the use of information systems in the development of environmentally acceptable modes of operation of hydraulic structures. The article was devoted to an actual theme - GIS-systems creation for hydro ecological monitoring as tool for support the information systems of the Aral Sea basin and optimisation models at development of ecologically applicable modes of exploitation of hydro technical buildings. It is possible and useful to use association of outputs from various scientific researches in one GIS-database as universal tool for modeling. As example of such approach can be consider as one interconnected system which combination results of work:
- System of water-salt balances in all rivers of Uzbekistan.
- System of digital maps and schemes that can be used in the development of environmentally acceptable modes of operation of hydraulic and hydropower facilities in Uzbekistan.
- The Aral Sea basin monitoring systems (ASBMS) as a digital system of hydroecological monitoring of quality of surface waters on basis ArcView.
Finite element modeling of fluid filtration in a deformable porous medium
Authors: Azhikhanov N T , Zhumagulov B T , Masanov Zh K , Bekbolatov A B 
Published: January 2020

Abstract
The scientific work considers the finite element modeling of fluid filtration in a deformable porous medium. A transversely isotropic medium has been taken as a deformable medium. Fluid filtration process to horizontal wells by drift type direction occurred in this transversely isotropic medium is studied. As filtration process goes, the stress layers are associated with the pressure, accordingly, equations have been shown regarding to this pressure. Numerical solution of the problem is carried out using the finite element modeling.
Characteristics of the plastic zones of the large-scale buildings soil foundation
Authors: Chunyuk D , Kurilin N 
Published: January 2020

Abstract
The particular scientific article contains the research of the form and adjustment of the plastic deformation zones, arising in the reactor building’s foundation, with due account of the nearby large-scale NPP buildings influence. The main feature of this research is the consideration of the stages of the ground foundation loading, modeling the process of the buildings construction. Four different versions of the most common sequences of loads were simulated in the calculations. The research was performed using the finite element method in nonlinear statement with application of the Mohr – Coulomb model. Based on the results of the calculation, the most favorable variant of the large-sized NPP buildings foundation was selected, also, was analyzed the form of the plastic deformation zones.
Study of the composite action of concrete and reinforcement in the floor in case of emergency impact
Authors: Mkrtychev O V 
Published: January 2020

Abstract
The article presents the results of a numerical study of the composite action of concrete and reinforcement in reinforced concrete flooring under emergency loads, taking into account physical and geometric nonlinearities. The study used a nonlinear static method in the LS-DYNA software package, which implements the Continuous Surface Cap Model (CSCM). The simulation model of a monolithic beam floor uses volumetric finite elements for concrete and rod elements for reinforcement. Isofields and graphs of the intensity of stresses and strains in the upper and lower reinforcement, as well as in the concrete at the floor elevation, with an increase in the vertical uniformly distributed load, were built. The load-bearing capacity of the monolithic slab under consideration was determined using the non-collapse criterion. The LS-DYNA software package makes it possible to study the action of load-bearing concrete structures modeling direct concrete reinforcement using reinforcing bars at a significantly nonlinear nature of strain.
Piezoelectric Stacks as an Effective Gauge of Small Dynamic Strains
Authors: Rogacheva N.N. 
Published: January 2020

Abstract
The theory of a new piezoelectric gauge of small dynamic strains is developed. The first previously proposed piezoelectric gauge is a thin piezoelectric element with preliminary polarization in the direction of its thickness. As a new gauge, piezoelectric stacks are used. Its direction of preliminary polarization coincides with the direction of the measured strains. As shown in the paper this kind of piezoelectric composite gauge can significantly increase the value of the measured electrical signal and the accuracy of the measured strains. Piezoelectric laminated stacks has a periodic structure, therefore, the homogenization method is used to correctly determine its effective characteristics (physical constants).
Application of modern modeling methods: virtual technologies in the era of digitalization and their role in modern companies
Authors: Lyapuntsova E V , Vdovichenko M , Belozerova Yu , Gorbatov A 
Published: January 2020

Abstract
The main research issue is the use of modern modeling methods: virtual technologies in the digital age and their role in modern companies. The aim of the study is to determine the degree of demand for virtual technologies in the modern market as an informational benefit of industrial purposes. Thus, we can talk about significant prospects for increasing the attention of both business structures and social institutions to the implementation of virtual reality technologies in their business processes in order to increase business efficiency and attract attention to innovative solutions.
Optimization of calculation of the stress-strain state of a base reinforced with inert material
Authors: Ter-Martirosyan A Z , Sergeev S A , Ermoshina Yu L 
Published: January 2020

AbstractIn this article, we performed a comparative analysis of the results of calculating the stress-strain state of a soil base reinforced with crushed stone columns, with calculation results obtained using a well-known technique that allows optimizing the calculation of the deformation characteristics of base soils. The calculations were performed by the finite element method (FEM) in the PLAXIS 3D software package. The base reinforcement was carried out in order to reduce the stabilized settlement by transforming the properties of the soil using crushed stone reinforcing elements. A comparative analysis showed good convergence of the values of the settlements of slab foundations, which allows us to apply the methodology for calculating the deformation characteristics of soils to optimize the calculation of the stress-strain state of the bases according to the second group of limiting states.
The analysis of existing neural networks for natural language interfaces
Authors: Pilyay A , Shilova L 
Published: January 2020

Abstract
This paper discusses the main types of neural networks and describes which are most suitable for solving problems within the framework of natural language user interfaces. The statistics of publications on the use of neural networks in various branches of science for the period from 2015 to 2020 are given, assumptions about the possible directions of integration of neural networks in the construction industry are made.