bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hybrid cross-tie system with passive dampers study
Authors: Pustovalova M , Konovalov A , Selivanov Y 
Published: February 2021

Abstract
The authors have investigated the use of passive vibration dampers through the implementation of concentrated masses in the hybrid cross-tie system of a cable-stayed bridge. A 3D model of a cable-stayed bridge was built in ANSYS suite. The authors have studied the stress-strain behavior and dynamic characteristics of the model under the gravity load. The study has shown that the most effective model appears to be the one with passive dampers implemented by means of six concentrated masses. The increased stiffness of links of the concentrated masses had stronger effect on the model with passive dampers implemented by means of ten concentrated masses, however the model where passive dampers were implemented by six concentrated masses displayed comparable values of natural vibration frequencies with deflections in the spans being 3% lower, displacements of the towers being 8% lower, and longitudinal forces in the main cable being 6% lower. The results obtained by the authors allow for the conclusion that all models of a hybrid cross-tie system with passive dampers reviewed have high aerodynamic stability.
Derivation of statistical parameters for flexure and shear resistance of reinforced concrete beams
Authors: Abdullah Z , Lutomirska M 
Published: February 2021

Abstract
The objective of this paper is a study on factors influencing the derivation of statistical parameters of flexural resistance and shear resistance for reinforced concrete beams. A variety of RC beams under bending and shear forces are designed and analyzed, taking into consideration different cross-sectional sizes, compressive concrete strengths, reinforcement ratios, and statistical distributions. The latest version of the American Building Code ACI-318-19 and ASCE/SEI 7-16 are used. The coefficient of variation (V) and bias factor (λ) for the selected models of reinforced concrete beams in flexure and shear are determined using the Monte Carlo simulation technique.
On the need to take into account the effect of wind on the frame of thin-walled steel structures during installation
Authors: Soloviev A V , Solovieva O N 
Published: February 2021

Abstract
Recently, the construction of buildings and structures using elements of light steel thin-walled structures has been increasing in Russia. The use of lightweight galvanized profiles provides a number of advantages in the manufacture, transportation and installation of frames. In the practice of designing structures of this type, the calculation of frames, as a rule, is carried out for the loads acting on the structure during its operation. In many cases, analysis of possible wind effects on frames during installation is not performed. This article examines the effect of wind on the frame of a 120-meter-long single-span building made of light steel thin-walled structures. Such structures, having a low mass, under certain parameters, can experience dynamic vibrations caused by the effect of wind. Most of the aeroelastic processes are self-oscillating in nature, occurring during energy exchange between the flow and the streamlined body. The main phenomena of aeroelasticity are flutter (stall flutter) buffing. If we consider the issues of aeroelasticity from the point of view of the effect on the structure, then such concepts as vortex excitation, galloping across the air flow, divergence and parametric resonance should be considered. If, during the design process, the analysis of possible wind effects on the frame is not carried out and measures are not taken to reduce the negative effect of wind, this can lead to deformation of the frame elements or their destruction.
Numerical verification of the saw-cut method
Authors: Kraľovanec J , Moravčík M 
Published: February 2021

Abstract
In Slovakia and other countries, a contemporary challenge for engineers and academics is an assessment of the state of existing prestressed concrete structures. The main components of assessment include regular inspections, maintenance, and diagnostics. For defining the load-carrying capacity and remaining service life, more reliable results of diagnostics are required. A need for detailed knowledge of the actual value of prestressing force is becoming a crucial aspect of civil engineering. There are many prestressed concrete structures built in the previous century which are about reaching their limit of service life. These structures are about sixty years old and many of them are exhibiting signs of deterioration due to the design and construction deficiencies, such as overloaded vehicles, environmental distress, and inadequate maintenance. In this paper, dozen concrete specimens are numerically analysed using the indirect non-destructive Saw-cut method. Ten of them are loaded by different level of compressive force which initiates compressive stress from 2.0 MPa to 12.0 MPa. Performed numerical analysis is an important basis for the experiment. The influence of temperature change caused by sawing will be later experimentally investigated on the remaining two concrete specimens. For numerical analysis, a 2D finite element model with the assumption of nonlinear material behaviour is performed. Subsequently, the correlation between the distance and depth of the saw-cuts, and amount of released strain or stress, as a result of numerical analysis, is outlined. Finally, the outputs obtained from numerical analysis are discussed and recommendations for the experiment are summarized.
Geometric and physio-mechanical characteristics of the contact layer area of multilayer reinforced concrete structures
Authors: Korol E A , Dinh Tho Vu 
Published: February 2021

Abstract
In the practice of modern construction, multi-layer building envelopes made of concrete of various physio-mechanical characteristics has been wide applied. During successive layer-by-layer laying of various concretes, contact layers are formed between them, and their physical and mechanical characteristics are different from the adjacent layers. Technological and time factors for the manufacture of this structure affect the formation, physical and mechanical characteristics of the contact layer between the inner and outer structural layers, and effecting to the working of the multi-layer structure. In this article, the geometric and physio-mechanical characteristics of the contact layer zone of multi-layer reinforced concrete structures are researched. The main content of study was conducted on samples of three-layer structural blocks with using strong structural concrete B25 in the external layers, and low-strength concrete in the middle layer. The geometric and physio-mechanical characteristics of the contact layers were researched by the experimental method. Based on the results of experiments, the geometric and physio-mechanical characteristics of the contact layer of multilayer reinforced concrete structures are shown, taking into account the influence of technological and time factors for the manufacture of this structure. Moreover, the results of the study allow us to determine rational parameters in design of multilayer envelopes with reinforced concrete layers of various strengths, interconnected by a monolithic contact layer. According to the results, modification and calculation method for multilayer reinforced concrete building envelopes has been evaluated and applied into the production process of these constructions.
Experience in forecasting long-term settlements of energy facilities based on monitoring data analysis
Authors: Ter-Martirosyan A Z , Sidorov V V 
Published: February 2021

Abstract
The article discusses the problem of predicting the long-term settlement of reactor compartments of nuclear power plant with a long history of operation and ongoing creep processes. The features of determining the time of the primary consolidation and the application of the parameters of the secondary consolidation are considered. With regard to the existing buildings of the reactor compartments of a nuclear power plant, a forecast of long-term deformations of the base was made, from the present time to 2062, which is the end of the operation period. The analysis and comparison of the obtained results with the data of geotechnical monitoring were also carried out. Analytical forecasting showed a high accuracy in determining the end time of filtration consolidation, however, a comparison of the values of the obtained creep settlements to date and the rate of their development shows significant differences, which makes it necessary to take into account the real picture of deformation for further forecasting in terms of operation time. Possible technological reasons for discrepancies in the results of calculations and geotechnical monitoring are analyzed, as well as theoretical reasons like imperfections of the analytical method used and the possible application of modern numerical methods.
Investigation of the diaphragm wall isolation of vibrations’ transferred through the subsoil
Authors: Wyjadłowski M , Grosel J , Tyulyaeva Y 
Published: February 2021

Abstract
Diaphragm walls are deep extended walls through granular or cohesive soils in shallow water table areas. This paper focus problems involved in excavating diaphragm walls including dynamic impact on the environment. Construction of diaphragm wall involves extracting a soil trench while simultaneously keeping heavy viscous slurry (bentonite) filling the excavation to provide lateral pressure that must be at least equal or greater than lateral soil pressure. Extraction of soil with machinery causes vibrations to be transmitted to the adjacent buildings. The research presented in the paper is also to assess the effectiveness of the concrete diaphragm wall in damping vibrations transmitted to the surrounding buildings. The first execution phase of the technology when a vertical finite-length trench element is excavated under a hydrostatic support from inside of a bentonite slurry is under consideration.
Claydite dust - a unique technogenic raw material for heat-resistant concretes production
Authors: Khlystov A , Isaev D , Suldin V 
Published: February 2021

Abstract
The article presents various methods of heat-resistant materials synthesis on the basis of aluminosilicate wastes of expanded clay production. Researches have shown that the application of physical and chemical methods in the course of studying of expanded claydite dust composition, structure and properties makes it possible to define the reason of physical and thermal parameters increase of the heat-resistant binders prepared in its composition. The article investigates the influence of refractory mineral waste of petrochemistry - aluminochromium spent catalyst IM-2201 on the processes of increasing the strength and performance indicators of binders based on expanded clay dust. The possibility of the fire resistance increase of mixed binders synthesized on the basis of expanded claydite dust and aluminochromium waste has been established. Application of phosphate and liquid glass binders in the processes of heat-resistant binders synthesis on the basis of expanded claydite dust allowed to increase their performance.
Developing physical and mathematical models of the water-air mode of gravity drainage network
Authors: Orlov V , Zotkin S 
Published: February 2021

Abstract
A physical and mathematical model of the water-air mode of free-flow drainage pipelines has been developed. The solution to the problem of physical modelling of pipeline network functioning is based on the study of the dynamics of changes in the hydraulic and aerodynamic parameters of the system, taking into account the phenomena of heat and mass transfer between liquid and air in the vaulted space of a free-flow pipeline. An algorithm for solving the problem is compiled on the basis of the criteria of hydrodynamic similarity, describing the phenomena of mass transfer as a result of forced air convection by using a mechanical ventilation system above the water surface. Based on the results of applying a special computer-aided calculation program, indicators of the required air exchange rate for effective removal of evaporation (steam) from the vaulted space of a pipeline were determined. As a result of solving the complex problem of studying the water-air mode of free-flow pipeline functioning, the authors compared and analysed the calculated values of the intensity of air exchange produced to remove steam, and to reduce harmful foul-smelling gaseous substances to reach the values of maximum permissible concentrations. The research results are aimed at preventing emissions of gases harmful to human health into the atmospheric air by constructive methods.
Development of an algorithm for implementation of operation control automation systems using BIM technologies for a capital construction facility
Authors: Didkovskaya O V , Guzhova O A , Hairullin M F K 
Published: February 2021

Abstract
The article is devoted to the problem of implementing BIM technologies for the operation of capital construction facilities. The research is relevant due to the problems that arose when transiting from traditional approaches to operation control of capital construction facilities to operation control based on the use of BIM technologies. The result of the research is the developed algorithm for implementing automation systems for operation control using BIM technologies. The implementation of the algorithm allows improving significantly the current operation systems of capital construction facilities. The algorithm distinguishes clearly the stages in their logical sequence, result, duration of each stage and the amount of costs.
Synthesis of air-curing phosphate binders and heat-resistant composites based on them
Authors: Khlystov A I , Shirokov V A 
Published: February 2021

Abstract
The article discusses methods for synthesizing phosphate binders hardening in air at normal temperature. Mixed binders are offered to obtain heat-resistant composites. They have the ability to acquire stripping strength in air conditions. It is concluded that the proposed binders should be synthesized from powdered industrial waste or from pure oxides, providing a reasonable ratio of their activity degree.
Justification of the possibility of laying cable communication lines at the side of roads
Authors: Rodionov M V , Dormidontova T V , Lavrov S E 
Published: February 2021

Abstract
One of the ways to improve road safety is to equip motor roads with automated traffic control systems. Such systems allow recording violations of traffic rules, responding to emergencies on the roads, providing automation of fare collection systems and driver information services, etc. To ensure the operation of automated traffic control systems, it is necessary to construct long cable communication lines. The best place for laying them can be the side of the road, however, at present in Russia there is not enough experience in construction that confirms the safety of such a solution. The authors present the results of research devoted to assessing the feasibility and safety of laying cable communication lines at the side of roads using micro-trenches.
Requirements and practice from measuring the deformation resistance of the formation of the railway subgrade of the Slovak railways modernized line Plevník-Drienové-Bytča-Žilina
Authors: Mečár M , Pultznerová A 
Published: February 2021

Abstract
Deformation resistance of the formation of the subgrade is the main indicator of the quality of the designed structural layers of the subgrade formation. Deformation resistance is determined in Slovak Railways (ŽSR) by a static plate load test and is expressed by the modulus of deformation Es
. The static load test not only verifies the correctness of the design of the type of structural layers of the body of the railway subgrade, but it is also an indicator of the quality of the performed construction works. On modernized ŽSR lines, is designed for subgrade type No. 3 and in the most unfavorable geotechnical conditions also the type of structural layers of the formation of the railway subgrade No. 6. The required value of deformation resistance at the level of the formation of the subgrade is designed with regard to the speed zone of the railway line. ŽSR corridor lines are designed for speeds up to 160 km/h, so they belong to the RP4 speed zone. Such lines also include a section of the ŽSR modernized Plevník-Drienové-Bytča-Žilina line.
Sustainability obstacles of free bike-sharing model
Authors: Kocianova A , Slebodnik L 
Published: February 2021

Abstract
Cycling is one of the options for sustainable urban mobility. Although this transport mode is not so widely used in Slovak cities, the bike-sharing project in Žilina with 80 thousand inhabitants has been remarkably successful. The system comprises of 120 shared bikes and 20 bike stations located mainly in the city core and wider centre to cover important transport destinations. During the first-year usage, a great interest of citizens has been recorded also thanks to the one-hour-free-of-charge service. That leads to an average rental number of 35 thousand bicycles per month (with a maximum of 47 thousand) and a high usage rate of the system (on average, 9.5 rides per bike per day). A more detailed analysis, including the Covid-19 pandemic’s impact on reducing bicycle rental, is presented in the article. In addition to the positive experience with the bike-sharing system, the disadvantages of the one-hour-free service model are discussed. In addition to the reduced service availability for citizens with real transport needs or higher users’ disrespect to the system, the technical operation costs are about 40 % higher due to an excessive wear system, poorer technical condition, and shorter lifespan of bicycles, or increase in a certain form of vandalism due to the bicycle joyriding. Ultimately, the overall loss is much higher because of no income, which threatens the sustainability of this system.
Influence of nano fly ash on wear behavior of friction stir weld joints of Al6063/nano fly ash composites
Authors: Gosangi Narasa Raju , Dumpala Lingaraju 
Published: February 2021

Abstract
The manufacturing industries attracted aluminium metal matrix composites (AMCs) to utilize in the modern spectrum of applications. Inexpensive particulate reinforced composites are exhibiting superior qualities at reduced costs. Fly ash is an industrial waste that can be adopted as reinforcement, particularly for aluminium matrix materials. Friction stir welding (FSW) is best suitable to weld aluminum-based materials. In this work, the Al6063/nano fly ash composites with 0, 1, 2, and 3% wt. of nano fly ash were fabricated through ultrasonic-assisted stir casting. Consequently, FSW joints were obtained for the fabricated composites by considering rotational tool speed and transverse tool speed as welding parameters. Wear analysis carried on weld beads of composites through the pin on disc equipment. The nano fly ash addition in the composites results in increased wear resistance in the FSW joints. Higher wear resistance was achieved with increased reinforcement inclusion. Increased tool feed rate also enhances the wear resistance of FSW joints. It can be concluded that the nano fly ash particles are the most influential in improving the mechanical properties of the AMC weld beads, and FSW is the better option to weld aluminum composites.
Implementation of Industrial Engineering concepts in Apparel Industry to improving Productivity and it’s cost reduction
Authors: Mekala N , Sanju S D , Thamaraiselvan V , Kavya M 
Published: February 2021

Abstract
In current scenario the fashion industry (industry 4.O) needs to satisfy the various needs of customer in the aspect of quantity as well as quality of the products. In traditional methods the apparel industry used basic sewing machines for all operations with the help of man power so on that time to introduce different styles in the apparel is very difficult. In recent days the automation as well as improved techniques known as industrial engineering concepts is applicable in the field to improve productivity as well as quality to overcome the competitive market. Manufacturing of garment involves number of operations in different departments. In apparel sector to improve productivity as well as quality one must concentrate on machine, method, material and man. So the industrial engineering concepts will cover and manage the all above said factors and help to improve the productivity as well as quality of the products that will satisfies the consumer needs. This paper is going to discuss about the existing (manufacturing) methods in apparel units and help them to improve productivity by applying the one of recent techniques such as Capacity Study, Work study, Time study, Operator Performance, Follow-ups, Work-in-Progress and line balancing and they are already proven techniques to improve the productivity in different industries.
Fabrication of Paddy Transplanter Machine
Authors: Rajamanickam Arun Kumar , Uvaraja V C , Selvamuthukumaran D , Surya K 
Published: February 2021

AbstractWheat and Paddy are the new focuses in farming where still, relatively few scientists and makers take an interest. This field faces a few issues, for example, how to boost the benefit, how to build efficiency and how to diminish the expense. In India, two sorts of horticultural gear are utilized, manual strategy (ordinary technique) and motorized sort. Automation includes the utilization of a gadget between the work and power source. Transplantation is the on the extensive labor processes in agriculture, where in cultivation field the workers need to work in stooping position which creates the physical ailments to labors. In this work, to eliminate the difficulties in rice cultivation design of semi-automatic rice transplanting machine by cost effective method was discussed. This machine helps the farmer to improve the productivity and efficiency. Machine was designed and fabricated by using the available materials. Compare to the commercial machines the project has more economic. Investigation of the machine performance indicate that it significantly reduces the effort of labors and translation time.
Experimental investigation on characterization of microwave welded Al6061-Gr-SiC hybrid metal matrix composites
Authors: Kandagal Zaheerabbas B , Akkimardi V G , Sonnad A N 
Published: February 2021

Abstract
In the present work, experimental microwave welding of Al6061-6%Gr-SiC hybrid metal matrix composites (MMC) in bulk form has been carried out. The principle of microwave hybrid heating was applied with domestic microwave having the frequency of 2.45GHz and 900W power. The interface powder Al6061 and susceptor as charcoal powder were used for the welding process. The stir casting process was used to prepare Al6061-6%Gr-SiC hybrid MMCs by varying SiC content by 3%, 6% and 9% and keeping 6% graphite constant by wt%. The composite weld joints were characterized by scanning electron microscope (SEM) equipped with energy dispersive spectrum (EDS) and mechanically through tensile test, Rockwell hardness test and impact test. The microstructure study showed the good metallurgical bonding between the interface and base composites without any visible cracks. The SEM-EDS study revealed the formation of various carbides and inter metallics at the weld interface. The average ultimate tensile strength of the joint was found to be 135MPa with 4.3% elongation. The average Rockwell hardness at the weld joint observed was 61.5HRB. The average impact strength of welded composite was 1.62J/mm2.