Кафедра "Архітектурне проєктування, землеустрій та будівельні матеріали" (Раніше кафедра "Управління проєктами, будівлі та будівельні матеріали"

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ENG: Dep. «Аrchitectural Design, Land Management and Building Materials» (ENG: Department "Buildings and Building Materials")

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10 лет отечественной отрасли пассажирского вагоностроения: история, сегодняшний день, перспективы развития
(ТОВ ЦІТУ, м. Харків, 2011) Приходько, Владимир Иванович; Хворост, Е. Ф.; Лутонин, Сергей Витальевич; Шкабров, Олег Анатольевич; Пшинько, Александр Николаевич; Мямлин, Сергей Витальевич; Донченко, Анатолий Владимирович
RU: Статья посвящена десятилетию отечественной отрасли пассажирского вагоностроения. История, сегодняшний день, перспективы развития.
Anti-Crisis Management of Passenger Transport as a Factor of Increasing Railway Competitiveness
(Національний технічний університет «Дніпровська політехніка», Дніпро, 2020) Pshinko, Oleksandr M.; Orlovskaya, Oleksandra V.; Charkina, Tetiana Yu.; Carra, A. O.
ENG: Methods. To conduct research, the following methods were used: competition, SWOT analysis, mathematical analysis, marketing models, the PEST analysis method, the decision-making method, the Kaizen approach to achieve a high degree of quality of a product or service, as well as systems approach. Results. The article proves the expediency of applying anti-crisis management of passenger transportation as a factor of increasing the competitiveness of the railway. The analysis of the development of the transport services market has shown that rail transport is gradually losing its passengers, in favor of air and road transport. The management of «Ukrzaliznytsia» has recently made many steps to improve the competitiveness of railway passenger transportation in the domestic market of transport services, but these measures are not sufficient today to restore the lost positions that the railway had before. In order to increase the level of competitiveness of railway passenger transportation, as well as to develop a larger segment in the transport services market, the following tasks are identified: to conduct research and analysis of factors affecting the current situation in the service market, to analyze the advantages of existing potential competitors in the transport services market, to analyze the experience of passenger transportation in the European Union, to develop measures that can be proposed to «Ukrzaliznytsia» to improve the efficiency of passenger services and generate additional profit. Novelty. Areas of crisis management to improve the efficiency of passenger transport are proposed, namely: the development of railway tourism, the introduction of a system of discounts «bonus ticket», the creation of a railway hub, implementation of Kaizen approach to achieve a high level of quality services, the organization of multimodal passenger transport by «travel card». Practical value. The implementation of the proposed measures and strategies will allow «Ukrzaliznytsia» to identify promising mechanisms for managing the passenger complex in the context of an escalating crisis. All these measures will help «Ukrzaliznytsia» to get out of the crisis and get additional profit for the passenger industry.
Application of Local Exhaust Systems to Reduce Pollution Concentration Near the Road
(Silesian University of Technology, Katowice, Poland, 2020) Biliaiev, Mykola M.; Pshinko, Oleksandr M.; Rusakova, Tetiana I.; Biliaieva, Viktoriia V.; Sładkowski, Aleksander
EN: In this study, the methodological foundations of the technology for the local reduction of chemical pollution from vehicles were improved through the use of twolevel suction units and guide plates of various lengths installed on the nozzles of the suction devices. A program has been developed for the numerical calculation of the carbon monoxide concentration field for evaluating the efficiency of using two-level exhaust systems with different lengths of guide plates on the gas flow selection pipes. The solution of the equations of hydrodynamics and mass transfer is carried out on the basis of finite-difference methods. A number of physical and computational experiments have been carried out; it has been established that the concentration of carbon monoxide in the zone of two-level suctions location decreases by 46-68%.
Comparative Analysis of Calculation Results of Supporting Structure of Soil-Cement Piles
(Kaunas University of Technology, Kaunas, 2019) Pshinko, Oleksandr M.; Petrenko, Volodymyr D.; Tiutkin, Oleksii L.; Andrieiev, Volodymyr S.; Hubar, Oleksіy V.; Ihnatenko, Dmytro Yu.; Markul, Ruslan V.
ENG: Abstract. The article presents the results of comparison of the stress-strain state of 4 models of a retaining wall structure of soil-cement piles on a landslide-prone slope. This study compares the changes in the stress distribution and displacements in the model elements of the retaining structure of soil-cement piles depending on the design parameters and the method of piles location in the body of the soil mass. The comparison of models of supporting structures of soil-cement piles on a landslide-prone slope allowed obtaining: –the comparative analysis of the quality work of individual elements of the supporting structure for strength and deformation in a three-dimensional representation; –the comparative assessment of the performance of the supporting structure of soil-cement piles on a landslide-prone slope; – histograms of dependences of changes in the angle of piles inclination to the vertical axis of their holding force, strength and deformation of the slope;
Concrete Properties Improvement of Slab Tracks Using Chemical Additives
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Pristinskaya, Victoria V.
EN: Purpose. On the Railways of Ukraine a very large number of slab tracks are operated with cracks. Many scientific works of previous years are dedicated to improving the design of slab tracks. The main causes of defects are: poor exploitation of the track; insufficient physic-mechanical characteristics of concrete; poor quality of initial materials. It is therefore necessary to develop an optimum concrete mix for the manufacture of these concrete products. Methodology. To assess the impact of individual factors and effects of their interactions on properties of concrete mix and concrete method of experimental and statistical modeling was used. At this, methodological fundamentals of mathematical experiment planning in concrete technology and modern methods of optimization of composite materials were taking into account. Based on the obtained data during the planned experiment conducting, including 15 studies and using the computer program MathCad, were obtained the regression equations, which describe the relevant physical and mechanical properties of concrete. On the basis of the equations with the help of computer program MATLAB R2012b the graphs were drawn, illustrating the dependences of system response from the changes of two factors at a fixed value of the third factor. Findings. Firstly was the analysis of cracks that occur in the process of operation in the constructions of slab tracks. Further reasons of possible occurrence of these cracks were presented. In the process of the conducted research the author has concluded that for rational concrete mix development it is necessary to conduct the planned experiment with the use of quality materials. It was established that to increase the strength, chemical additives should be added in to concrete mix, it will let reduce cement amount. Originality. Experiments proved the usage of modern chemical additives in order to improve the properties of concrete. Models were developed, reflecting characteristics of concrete strength. With their help one can optimize concrete composition. Practical value. Research proved that the usage of more sustainable concrete mix for production of slab tracks will increase their strength, and with it the reliability of these designs mechanical properties.
Constructional Features of Shearwalls Stiffness in a Lightweight Steel Framing Buildings
(De Gruyter Poland, Warsaw, 2019) Zinkevych, Oksana G.; Savytskyi, Mykola V.; Zinkevych, Andrii M.
EN: Abstract. For low-rise buildings frame technologies using lightweight thin-wall steel constructions have become significantly widespread. The main influence on a building’s spatial rigidity under lateral forces is taken by shearwalls. The necessary stiffness can be accomplished by setting definite constructional parameters that are selected according to the design approach. The purposes of the work are to receive the dependencies of the influence of the constructional features on the stiffness of the shearwalls (using FEM models) and to set the value of the stiffness of the shearwall of any configuration by linking its parameters with the corresponding parameters of a standard shearwall through the established dependencies. The received dependencies of the effect of the main constructional factors and design approach for the stiffness of shearwalls can be used to provide spatial rigidity. A simplified design approach for estimating the influence of the main constructional features of shearwalls on their rigidity has been developed.
Directions of Anti-Crisis Management of Restaurant Business
(ДДУВС, Дніпро, 2021) Pshinko, Oleksandr M.; Charkina, Tetiana Yu.; Pikulina, Olena V.; Basistha, Nandini
ENG: In this article, the authors emphasize that the pandemic and quarantine measures have brought the normal functioning of the world economy and the activities of many enterprises. The tourism business and the hotel and restaurant sector, which have recently developed greatly, have suffered from extensive losses and bankruptcies, a large number of restaurants and cafes have been closed, and many people have lost their jobs and their income. Even large chains of hotels and restaurants have suffered as well as other businesses. The hotel and restaurant business was the first one that has to adapt quickly to changes caused by the pandemic, to stablish work in new conditions and develop new directions and measures that will take the restaurant business out of the crisis. Given the current need to apply security rules, and the need to comply with quarantine measures, it is necessary to use computer and digital technologies that will help managers to attract new customers and earn extra income. The authors propose to use such tools of crisis management of the restaurant business as: technologicalization, online marketing and influencer – marketing, unique content. These activities are necessary in order to pay new attention to the dishes and services offered by cafes and restaurants. To restart this business in a modern way and with new tendencies, and to adapt to changes in the changing environment and to quarantine measures. To develop additional promotions and offer «economy», «standard» and «luxury» class menu. To organize the fast, high-quality delivery to cafes and restaurants in modern conditions, preferably free, it has become a great necessity and convenience in pandemic conditions; it will attract additional consumers to the restaurant business. In the modern market concept of restaurants in a pandemic, it is necessary considering not only the factors that existed for many years, but also new additional factors in the hotel business, without which it is now impossible to operate this business in a pandemic, it would be safe to provide services, awareness of the service In the modern market concept of restaurants in a pandemic, it is necessary considering not only the factors that existed for many years, but also new additional factors in the hotel business, without which it is now impossible to operate this business in a pandemic, it would be safe to provide services, awareness of the service or product, in the use of digital technology by an institution that wants to get more income and occupy a larger segment in this market of hotel and restaurant business. The authors insist that in modern conditions, it is essential to take into account the laws of competition; because now the consumer chooses a quality product or service at a better price, other goods or services do not attract consumers.
Dry Building Mixes for Repair of Concrete and Masonry Structures
(Минск, 2003) Savitsky, Nicolay V.; Pshinko, Aleksandr N.; Tytuk, A. A.; Zinkevych, Andrey N.; Chernets, V. A.
EN: The complex of the questions connected with development of dry mixes - modified compositions on a portlandcement basis is considered in the article. Such materials are applying for repairing of concrete and masonry structures by an injection. Also the basic requirements to material and the group of parameters - criteria of quality are described.
Economic and Mathematical Models of Development of the Railway Tourism
(NTI-UkrSURT, Kharkiv, Ukraine, 2019) Pshinko, Oleksandr M.; Martseniuk, Larysa V.; Bobyl, Volodymyr V.; Kakhovska, Olena
ENG: Abstract. The authors used a complex of mathematical models meant for the optimal investment of the processes of creation and use of the railway transport infrastructure. The specific features of these models are as follows: long-term period of realization of the infrastructure projects, many participants with special interests, which do not always coincide, a lot of factors of uncertainty connected with the choice of quantities of the calculation parameters, etc. The authors created economic-mathematical models of the discrete optimal planning of the railway tourism operations. This takes into account conditions of risks and cooperation, and allows to determine sets of effective routes which are most profitable ones, provided they meet the established demands. The latter includes routes which meet maximum criteria of the net costs under the conditions of the established system of demands for the activity of the tourism operators.
Effect of the State of Car Running Gears and Railway Track on Wheel and Rail Wear
(Technical University of Budapest, Budapest, 1998) Blokhin, Evgen P.; Pshinko, Oleksandr M.; Danovich, Viktor D.; Korotenko, Mykhaylo L.
EN: This paper presents the results of theoretical research and real condition experiments which were conducted with the purpose of determining the influence of the open goods wagon running gear characteristic parameter deviations from their nominal values on the wheel and rail wear. The experimental results has confirmed the reliability of conclusions made on the basis of modelling.
Energy-Efficient and Cost-Effective Methods of Driving Trains under the Conditions of Development of the Electricity Market
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Pshynko, Alexander N.; Afanasov, Andriy M.; Kuznetsov, Valeriy; Skalozub, Vladyslav V.; Arpul, Serhii V.; Ivanov, Alexander P.
ENG: Abstract. The article for the first time considers the possibilities for the organization of cost-effective rail transportation on electrified section in terms of the functioning of the Ukrainian balancing electricity market. It is formulated the complex task of choosing effective mechanisms of purchase and sale on the electricity market on the basis of contracts for the implementation of markets "for the day ahead", as well as for the appointment of parameters and tariffs of the intraday market. The authors presented the models and results of calculations of optimum modes of trains’ driving, which are calculated for various criteria of efficiency taking into account the cost of the consumed active and reactive electric energy. The technique of tariff formation for purchase of electricity on the balancing market was proposed.
Estimation de L’influence des Particularites de Conception a la Rigidite du Mur-Diaphragme Dans le Batiment a L’ossature en Elements a Parois Minces en ACIER
(ДВНЗ "Придніпровська державна академія будівництва і архітектури", Дніпро, 2017) Zinkevych, O. G.; Zinkevych, Andrii M.; Savytskyi, Mycola V.
EN: Purposes of work are to receive the dependences of constructional features’ influence on shear walls stiffness (using FEM models) and to set the value of any configuration’s shear wall stiffness linking its parameters with correspondent parameters of the standard shear wall through the established dependences. Methodology. Standard sharewall’s stiffness was defined experimentally (here, by FEM modeling) and used as initial data for calculation. Results. There was developed the simplified design approach of estimating influence of main constructional features of shearwalls on their rigidity, enabling definition of requirements to the construction on the preliminary stage of forming space-and-planning decisions for frame building of LSTC. Received results enable to conclude that developed design approach is reliable enough for estimation of sharewall stiffness. Scientific novelty and practical value. Received dependences of main constructional factors’ influence and sharewalls stiffness design approach can be used for providing spatial rigidity by the following: setting requirements to construction of sharewalls; limitation of the distance between sharewalls (decreasing load space); limitation of the number of openings in sharewalls.
Estimation de L’influence des Particularites de Conception a la Rigidite du Mur-Diaphragme Dans le Batiment a L’ossature en Elements a Parois Minces en ACIER (preprint)
(ДВНЗ "Придніпровська державна академія будівництва і архітектури", Дніпро, 2017) Zinkevych, O. G.; Zinkevych, Andrii M.; Savytskyi, Mycola V.
EN: Purposes of work are to receive the dependences of constructional features’ influence on shear walls stiffness (using FEM models) and to set the value of any configuration’s shear wall stiffness linking its parameters with correspondent parameters of the standard shear wall through the established dependences. Methodology. Standard sharewall’s stiffness was defined experimentally (here, by FEM modeling) and used as initial data for calculation. Results. There was developed the simplified design approach of estimating influence of main constructional features of shearwalls on their rigidity, enabling definition of requirements to the construction on the preliminary stage of forming space-and-planning decisions for frame building of LSTC. Received results enable to conclude that developed design approach is reliable enough for estimation of sharewall stiffness. Scientific novelty and practical value. Received dependences of main constructional factors’ influence and sharewalls stiffness design approach can be used for providing spatial rigidity by the following: setting requirements to construction of sharewalls; limitation of the distance between sharewalls (decreasing load space); limitation of the number of openings in sharewalls.
Experimental Investigation and Theoretical Background of the Optimal Control of the Concrete Mixture Forming
(University of Žilina, Slovakia, 2023) Pshinko, Pavlo O.; Dekhta, Tatyana M.; Hromova, Olena V.; Steinbrech, Oksana V.
ENG: Concrete belongs to the most used building materials, applied in almost all types of constructions (civil, industrial, road, hydraulic, subway constructions, etc.). Currently, the most common is the vibration method of molding concrete and reinforced concrete products. However, the issues of choosing a rational mode for compacting concrete mixtures, its effect on density and, accordingly, strength, water resistance, frost resistance and deformation properties of concrete, remain insufficiently studied. The best results are obtained by using the optimal frequentative vibratory influence method. In this case, concrete strength is increased by 25-30 % in comparison to the factor of concrete compacted by traditional method.
Hubs as a Key Tool for Improving the Quality of the Service and Development of Multimodal Passenger Traffic
(The Silesian University of Technology, Faculty of Transport, Katowice, Poland, 2022) Pshinko, Oleksandr M.; Charkina, Tetiana Yu.; Martseniuk, Larysa V.; Orlovska, Olexandra V.
ENG: This article stresses the need to develop multimodal passenger transport. Particular attention is paid to the construction of HUBs based on railway stations. HUB is the transport interchange node, passenger complex, which redistributes passenger flows between transport modes and directions. They allow to optimize transportation processes, as well as to create an infrastructure for convenient and fast passenger transfer between different transport modes. The preconditions for creating organizational conditions to ensure the sustainable development of the passenger railway transport sector are outlined. In the near future, combined passenger transport with the participation of several modes of transport will attract tourists from around the world. The authors’ concept of the term “passenger comfort zone” is proposed, which takes into account all the needs of modern tourists. The mechanism of multimodal transportations of passengers by railway transport in interaction with other participants of the servicing process is presented. A model of institutional support for the development of multimodal passenger railway transport is proposed to create conditions for integrated transport services for passengers by the passenger railway transport complex. The expediency of forming a system of railway passenger HUBs in Ukraine is vital to attracting investments to improve transport and tourism infrastructure, as well as to roll stock and a range of services for the benefit of all stakeholders in the transport sector (e.g., the state, investors, and passengers).
Hydraulic Concrete Composition and Properties Control System
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Pshinko, Oleksandr M.; Krasnyuk, Andrey V.; Hromova, Olena V.
EN: Purpose. Scientific work aims at the development and testing of information system to meet the challenges of concrete composition design and control (for railway structures and buildings) based on the physico-analytical method algorithm for hydraulic concrete composition calculation. Methodology. The proposed algorithm of hydraulic concrete composition calculation is based on the physicochemical mechanics and in particular on the rheology of elastic–viscous–plastic bodies. The system of canonical equations consists of the equations for concrete strength, absolute volume, concrete mix consistency as well as the equation for optimal concrete saturation with aggregates while minimizing cement content. The joint solution of these four equations related to composition allows determining for the materials the concrete composition of required strength, concrete workability with minimum cement content. The procedure for calculation of hydraulic concrete composition according to the physico-analytical method consists of two parts: 1) physical, which is laboratory testing of concrete mix components in different concrete compositions; 2) analytical, which represents the calculation algorithm for concrete compositions equivalent in concrete strength and workability that comply with the specific conditions of concrete of designing the concrete composition with the desired properties for railway structures and buildings it was proposed to use the information technology in the form of a developed computer program whose algorithm includes the physico-analytical method for hydraulic concrete composition determination. Originality. The developed concrete composition design method takes into account the basic properties of raw materials, concrete mix and concrete, which are predetermined. The distinctive feature of physico-analytical method is obtaining of a set of equivalent compositions with a certain concrete mix consistency and required concrete strength, which allows to optimize the concrete composition by any optimality criterion, depending on the operation conditions. Practical value. Using the developed method will expand its functionality when applied in the form of the composition calculation computer program for the construction and repair of surface and underwater structures. The use of physico-analytical methodat production site will simultaneously solve the economic problems of construction and maintenance cost reduction,component saving and ensure obtaining the concrete with the set properties for specific operation conditions of transport engineering structures.
Improvement of Concrete and Building Mortar Technology Using Secondary Mineral Resources
(Національний гірничий університет, Дніпро, 2022) Pshinko, Oleksandr M.; Pavlenko, T. M.; Dekhta, Tatyana M.; Hromova, Olena V.; Steinbrech, Oksana V.
ENG: Purpose. Improving the technology of concretes on the basis of secondary mineral resources (waste foundry sand of metallurgical and machine-building industry, ash-and-slag mixes of thermal power plants). Methodology. Generally accepted standard methods in the study of the basic properties of raw materials, concrete mixes and concretes are used in the work. The samples were moulded using specially made laboratory vacuum equipment. Findings. The study results on the main properties of concretes on the basis of secondary mineral resources confi rmed the effectiveness of vibrovacuum technology. For example, the strength of ash-and-slag vacuum concrete is on average higher than the strength of vibrocompacted concrete from a mobile concrete mix by 6–10 MPa or by 60–100 % (depending on the cement consumption). Also, high-quality concretes with moderate cement consumption for various types of construction are obtained on the basis of waste foundry sand. Originality. Scientifi c and technical bases of the technology of vibrovacuum concrete on the basis of waste foundry sand and ash-and-slag mixes were developed. Practical value. Through the development of the technology of vibrovacuum products based on secondary mineral resources concrete, high-quality concretes (increased strength, frost resistance, etc.) were obtained for road and other types of construction. This technology allows applying the existing technological equipment without fundamental design changes, carrying out immediate dismantling of moulded products, which signifi cantly reduces the metal consumption of the technology.
Improving the Efficiency of the Heating System for Public Buildings Infrastructure in the Context of DNURT
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2016) Pshinko, Oleksandr M.; Kuznetsov, Valeriy; Yatsenko, Dmytro K.; Gabrіnets, Volodymyr O.
EN: Purpose. The paper analyses the possibility and terms of increasing the efficiency of heating and ventilation systems of public buildings at the present stage of development and the specific climatic conditions of Ukraine. The main purpose is to develop specific measures for public buildings, which will lead to a significant reduction in energy costs for heating and air conditioning system. The example is similar system of DNURT compact campus, which is heated with its own autonomous boiler that uses natural gas. Methodology. The statistical heat loss analysis for the last 5 years allows defining the types and calculating the heat loss values for specific conditions. These losses are compared with those in the world practice and based on the comparison and analysis of the current system there are offered the ways to reduce the heat loss values through the use of various technical and organizational methods. The paper also proposes involvement for this purpose of secondary and alternative energy sources. The secondary energy resources include the heat that is emitted by people and that coming out with the air during ventilation of buildings. The renewable sources include solar and geothermal energy. To enhance the heat transfer medium temperature capacity it is proposed to use the heat pumps. Findings. The maximum possible use of the proposed measures and implementation of rational schematic and engineering solutions for heat and hot water supply systems cam reduce the energy loss for heating and hot water by 30-35%. Originality. The paper for the first time proposed the use of new integrated approaches to maintain the desired heat balance in the winter period, as well as the new schematic solutions for heating and ventilation systems, both in winter and in summer, based on the use of heat pumps and secondary energy resources. Practical value. The introduction of the proposed schematic solutions and approaches demand relatively small capital investments and do not require significant reconstruction of already installed systems.
Influence of Constructional Features on Shear Walls’ Stiffness in a Lightweight Steel Framing Buildings
(Nauka i studia, Przemysl, 2013) Savytsky, Mycola V.; Zinkevych, O. G.; Zinkevych, Andrii M.
EN: Dependences of constructional features’ influence on shear walls stiffness in a lightweight steel framing buildings are received. On the basis of dependences approach for any configuration’s shear wall stiffness estimating is developed, allowing to make decisions for providing spatial stiffness of the building.
Influence of Frequency Characteristics of the Locomotive on Rational Values of Parameters of Its Vehicular Part
(Georgian Technical University, Tbilisi, Georgia, 2016) Pshin'ko, Oleksandr M.; Myamlin, Serhiy V.; Neduzha, Larysa O.
EN: Ukraine rail freight turnover for more than 3/4 is provided by electric traction. Therefore, the efficiency of railway transportation is largely determined by a sufficient amount and reliability of electric locomotives fleet. One of the main directions in this problems solving is to increase of Ukraine railway transport efficiency is to equip it by quite powerful, reliable and economical locomotives with good dynamic properties. In order to determine the basic indicators that affect on the rational value of its vehicular part 's parameters, as well as on the capacity for work and the physiological condition of the locomotive crew, was carried out a frequency analysis of the elements of the locomotive design. For this stage of the research were compiled simultaneous differential equations due that were identified own resonant frequencies of oscillations of components of electric locomotive. The practical value of the whole complex of theoretical research is to develop an algorithm and program, selection of rational parameters and design scheme of the locomotive undercarriage. Carried further dynamic performance trials have shown that the calculation data obtained with the application of theoretical studies, fairly well correspond to the results of tests, which indicates on a good selection of the constructive scheme of vehicular parts.
L’un dés techniques les plus efficaces du point de vue de la construction des bâtiments à faible hauteur ou de la surélévation des batiments existants est l’utilisation des constructions en elements à parios minces en acier (CEPMA)
(Приднепровская государственная академия строительства и архитектуры, 2013) Savytskyi, Mycola V.; Zinkevych, O. G.; Zinkevych, Andrii N.; Bereza, I. V.
FR: Dans le cadre de cette étude on a evalué l’influence de la rigidité (flexibilité) des liasons entre les profils de carcasse en CEPMA et des panneaux de parement sur la longueur de calcul dans le plan de rigidité minimale à l’aide du modèle proposé de MEF. Les résultats obtenus ont été comparés avec les longueurs de calcul des éléments, obtenus pour le problème analogique, résolu à l’aide de la méthode de calcul.
L’un dés techniques les plus efficaces du point de vue de la construction des bâtiments à faible hauteur ou de la surélévation des batiments existants est l’utilisation des constructions en elements à parios minces en acier (CEPMA) (preprint)
(ПГАСА, 2013) Savytskyi, Mycola V.; Zinkevych, O. G.; Zinkevych, Andrey N.; Bereza, I. V.
FR: Dans le cadre de cette étude on a evalué l’influence de la rigidité (flexibilité) des liasons entre les profils de carcasse en CEPMA et des panneaux de parement sur la longueur de calcul dans le plan de rigidité minimale à l’aide du modèle proposé de MEF. Les résultats obtenus ont été comparés avec les longueurs de calcul des éléments, obtenus pour le problème analogique, résolu à l’aide de la méthode de calcul.
Mathematical Modeling of Aeroion Mode in a Car
(The Silesian University of Technology, Katowice, Poland, 2022) Biliaiev, Mykola M.; Pshinko, Oleksandr M.; Rusakova, Tetiana I.; Biliaieva, Viktoriia V.; Sładkowski, Aleksander
ENG: Summary. In this study, a mathematical method is proposed for calculating the concentration field of air ions of different polarities and dust levels in the passenger compartment, taking into account the geometry of the passenger compartment and seats, shelves, and other internal elements of the passenger compartment. The method also takes into account changes in the rate of the air flow ventilation, the location and number of ionizers, and sources of positive ions and dust, taking into account their different intensities and locations. On the basis of a numerical model for this method, software has been developed that allows users to carry out computational experiments without requiring much time for calculation. Based on the results, the optimal location of the ionizer in the passenger compartment of the car was determined to ensure comfortable conditions for the stay of passengers, which favorably affects their health. It has been found that the presence of two ionizers is optimal for creating comfort in the car with an ionization intensity of ions/s located at the top of the car. If there is one ionizer located on the dashboard or at the top of the car with a higher ionization rate than ions/s, it is not possible to simultaneously provide optimal ionization parameters for passengers in the front and rear seats of the car.
Peculiarities of Structural Characteristics of Modified Concrete Cement System at the Early Stages of Hardening
(Придніпровська державна академія будівництва та архітектури, 2019) Pshinko, Oleksandr M.; Rudenko, Dmytro V.
EN: Abstract. Purpose. Determination of the types of bonds formed in the modified concrete cement matrix and the evaluation of the quality of these bonds in a inhomogeneous material for the determination of geometric and physical relationships between the structure of modifiers and the cement matrix at the early stage of structure formation. Method. Investigation of the processes of hydration and structure formation of conventional and modified cement systems was carried out using X-ray diffraction, differential-thermal and microscopic analyses, and infrared spectroscopy. The analysis of the structural parameters of the cement matrix of concrete was carried out by the method of mercury porosimetry, as well as the adsorption of water and nitrogen vapor. Results. The system of assembling with the corresponding structure is formed during the layout and contact of the mineral components of the cement system and aggregate grains in the process of mixing with water, stirring and placing of concrete mixture. The change in the quantitative characteristics of the structure of modified concrete was observed at the change in the intensity of modification. Observed changes in the morphological structure of the cement matrix cannot be random, as they are confirmed by repeated experiments at reproducibility from 82 to 96 %. At the same time, such a change in the morphology of new formations was not observed in normal concrete. From the given data, a significant increase in the lamellar-prismatic component in the cement matrix of modified concrete is obvious. The number of formed crystalline new formations increases with the increase of curing time. This can be explained by the system approach: the morphology of the structure of the cement matrix − the result of the interaction of systems of assembly and growth. At the same time, the growth system (recrystallization and development of the structure in time) can effectively develop without a sufficiently complete development of the system of assembly (accumulation of primary products of hydration). Scientific novelty. For the first time, the peculiarities of the structured formation of the modified cement system have been established, they consist in the fact that magnesium chloride hydrate crystals grow rapidly in the space between the hydrated new formations of clinker minerals, and as the result, the mechanical bond is responsible for the development of initial strength and stiffness. Since the free growth of crystals is hindered by the lack of space, the crystals mutually germinate, forming a dense structure that causes the growth of strength; it was first established that in a modified hydrated cement system, as a result of the interaction of different macroions, a structure-forming process develops with a predominance of active parts that significantly exceed its dissipative part in comparison with normal cure conditions. The results obtained in modeling the behavior of the modified cement system, which is hydrated, show that the system has fluctuations in the concentration of intermediate products of hydration, identified with the appearance of the spatial-temporal structure. Practical relevance. Physico-chemical modification of the cement system provides a change in the morphotropy of new crystalhydrate formations, which will contribute to the formation of the design properties of concrete.
Problems of Development of an Underground Transport Infrastructure of Cities
(The Silesian University of Technology, Faculty of Transport. Katowice, Poland, 2020) Pshynko, Oleksandr M.; Radkevych, Anatolii V.; Netesa, Nikolay I.; Netesa, Andrii M.
ENG: Summary. The goal of this article is to determine rational constructional and technological options for the development of underground space, in particular, the arrangement of underground parking lots under the specific hydrogeological conditions of Dnipro city. In this article, the best practices in the construction of similar facilities in the world are discussed. Arrangements for individual structural elements and structures as a whole were considered. The main resources for their implementation are determined, the most important performance indicators are calculated, their comparison is carried out and proposals for the use of individual technological concepts are developed. The experience of underground space development in Dnipro city is studied and the problems of construction of underground structures under specific difficult hydrogeological conditions are identified. The proposed technological concepts make it possible to implement such design solutions under difficult hydrogeological conditions with dense development and preservation of historical buildings in the city.
Project of Libertarianism in the Conceptual Interpretation of Postmodernity: Microcosm VS Macrocosm and the “Inbetween Man”
(Khachatur Abovian Armenian State Pedagogical University, Yerevan, RA, 2021) Vlasova, Tetiana I.; Pshinko, Oleksandr M.; Bondarchuk, Serhiі; Veprytskyi, Roman
EN: The ambivalence of meanings in the postmodern theories accentuates the hermeneutic interpretation of concepts: the new “cosmic meanings” have changed the world picture i n q uite a r evolutionary way. Though the views on postmodernism are contradictory, of principle importance is the idea that there are some valid “inventions”, which have given meaning to this term; in politics, it is the rise of neoliberalism and libertarianism. Thus, the paper aims to research the interrelation of the “inner” logic of the “free individual”, his/her micro-and macrocosm in libertarianism with the external political transformations and ideological discourses of postmodernity. The research results show that science and arts allow focusing on the interpretation of the consequences of those phenomena, which are going on at the level of the “political unconscious”. The theorists insist on rethinking the categories of libertarianism: the included concepts are challenging to combine in the principle of the domination of liberty. The focus on libertarianism stipulates the novelty of the research as the postmodern feature, which provides validity to the term “late postmodernism”. The new cosmology of the third millennium gives the possibility to use the term “cosmological postmodernism”.
Properties of Modified Concrete for Special Purpose Structures
(Дніпропетровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2018) Rudenko, Dmytro V.
EN: Purpose. The paper is aimed at developing the scientific fundamentals of new-generation monolithic concrete technology for special purpose structures by controlling the processes of structure formation of a modified cement system under natural hardening conditions. Methodology. The kinetics of interaction between the cement system and aggregates was evaluated by microcalorimetry. The measurements were carried out continuously for 24 hours after preparation of the mixture. The differential and integral characteristics of the heat release of the solidifying system were recorded. nvestigation of the rheological properties of concrete ixtures was carried out on the mixtures with 10...15 cm consistency. The microhardness of contact layers was investigated on concrete cubes with dimensions from 20×20×20 to 0×50×50 mm. When determining the structural characteristics, x-ray phase and differential-thermal analyzes of the concrete cement matrix were used. Infrared spectroscopy was used to determine the effect of physicochemical modification on the cement system. Tensile creep was studied over a wide load range from 0.2Rt to 0.8Rt. Findings. It is determined that the reason for changing the concrete properties of natural hardening is the change in its ygrometric and thermal state, as well as the harmonic fluctuations of these environmental factors. The hygrometry of concrete depends on the thermal moisture conditions of the environment, the type and composition of concrete, the massiveness of concrete elements. An analysis of these factors and experimental data made it possible to establish the exponential dependence of the change in the hygrometric state of monolithic natural hardening concrete. The change in the moisture state of concrete makes it possible to predict its volumetric deformations. Originality. For the first time, the features of the structure formation of a modified cement system are established, consisting in the fact that magnesium chloride hydrate crystals grow rapidly in the space between hydrated clinker minerals, and the resulting mechanical cohesion defines the development of initial strength and rigidity. Since the free growth of crystals is hampered by a lack of space, the crystals mutually intergrow, forming a dense structure, contributing to the growth of strength. The developed organo-mineral modifying complex provides disperse reinforcement of the cement matrix of concrete. Practical value. The obtained ependences of structural concrete stresses make it possible to analyze their effect on the structure of modified concrete: to determine the probability of formation around the filler particles of the plastic flow zone, the material microcrack formation zone, the crack initiation period, the microcrack onset conditions, and the change of elasticity modulus of the material caused by microcracks in its structure. Disperous modification of cement matrix allows to obtain durable oncrete of special purpose with design operational roperties. The developed binder disperse modification technology, the established features of the structure formation mechanism for the modified cement system, as well as the use of the principle of congruence of a complex of technological influences to the physico-chemical processes of hydration of clinker minerals allowed developing the scientific fundamentals for the special purpose concrete technology. This helps to expand the use of modified concrete in various types of construction.
Proposals for Revitalizing Urban Post-Industrial Areas: A Case Study of a French Town
(EDP Sciences - Web of Conferences, France, 2024) Merylova, Iryna O.; Zinkevych, Oksana G.; Bordun, Maryna; Zinkevych, Andrii M.; Rabenseifer, Roman
ENG: The article aims to investigate the current state and identify potential development pathways for the small industrial town of Lavaveixles-Mines in the Creuse Department of the Nouvelle-Aquitaine region, France. The purpose of this study is to develop and propose architectural and urban planning measures and initiatives for the restoration and reactivation of post-industrial areas using the case of the researched city. The methodology used in this research is based on an interdisciplinary approach that combines architecture, urban planning, urbanism, history, sociology, economics, and ecology. This has contributed to the development of innovative solutions aimed at revitalizing outdated industrial territories while preserving their unique identity. As a result, the most effective concept for architectural and urban planning transformation of the city was found and some specific methods and techniques presented in this study were developed.
Prospects of Mastering of Underground Space by Erection of Multistory Underground Apartments of Multifunction Complexes
(SHEE “Prydniprovska State Academy of Civil Engineering and Architecture”, Dnipro; Slovak University of Technology, Bratislava, Slovakia, 2018) Pshynko, Aleksander N.; Radkevych, Anatoliy V.; Netesa, Andrey N.
ENG: It is set a statistical analysis, that the monolithic framework systems of building and building are widely used in Ukraine. Economy, high reliability and longevity, possibility over of the free planning into building was brought to the wideuse of multistory monolithic reinforce-concrete frameworks of housing and public building. One of basic tendencies in modern building on territory of Ukraine active mastering of underground space. The specific of modern building of underground parts of building and building is a variety of technologies of erection, difficult terms of geohydrology, closeness of surrounding building, high closeness of underground communications and other factors. With introduction to the action of new normative documents of erection of multilevel underground building became especially actual in the conditions of making more compact building of large cities. In this division of monograph the оновні problems of underground building of objects are considered on territory of Ukraine. The analysis of modern normative documents is executed, actuality of erection of multifunction complexes of the publicly-housing setting is certain. The basic methods of erection of underground parts of such complexes are analysed after various technologies. It is set that in the conditions of modern building there is a necessity of rationalization of технологіх erection of underground elements of building and building. Necessary complex analysis of advantages and lacks of existent technological processes. In addition, зформувати is important and to analyse factors that influence at choice rational technology of erection of underground elements of building. They must be elected as parameters of concrete site area, to depend on the terms of geohydrology, surrounding building, concrete project decisions et cetera. Simple and clear methodology that will allow by passing of algorithm to choose the most rational method of implementation of works must become a result. Important direction of researches is remained by the permanent study of front-rank experience of advancement of world organizations on erection of underground floors of building under trying conditions to the geohydrology and in the conditions of making more compact building, development of existent technologies and creation of new. It is necessary to strengthen development of normative documentation for underground building, with the study of front-rank experience of leading in this industry project organizations.
Regional Peculiarities of Rural Tourism Development in Ukraine (Using an Example of Dnipropetrovsk Region)
(SHEE “Prydniprovska State Academy of Civil Engineering and Architecture”, Dnipro; Slovak University of Technology, Bratislava, Slovakia, 2018) Bondarenko, Olga; Pshinko, Oleksandr M.; Husenicova, Jarmila
EN: Recreational development of rural areas enhances expanding the range of recreational services for citizens at a different qualitative and content level, and also contributes to revival and preservation of historical and cultural heritage of the region in general and the Ukrainian village in particular ensuring activation of social and economic development of the regional rural areas.
Research of Operational Properties of Modified Specialized Concrete for Transport Constructions
(EDIS, University of Zilina, Slovakia, 2019) Pshinko, Oleksandr M.; Shcherbak, Andriy S.; Rudenko, Dmytro V.
EN: It was established that the polymeric component of the organomineral modifying complex changes the nature of the super-molecular structures in the activated cement system - at optimal filling, globules decrease in size preventing the phase surface diffusion, which contributes to increase of the waterproofness of modified concrete. When introducing a modified cement system into the concrete mixture, the reduction of the open porosity to 3-5 %, depending on the composition, has been achieved. Conducted tests for water resistance and frost resistance of the repair layer of concrete showed that the modified concrete corresponds to the mark on water resistance W14 and the brand on the frost resistance F300. The developed technology of physico-chemical activation of the cement system allows the use of conventional cement for obtaining durable concrete of special purpose, which allows to reduce the cost of such concrete by 27-34 %.
Research of Railway Crashed Stone Use of 40 –70 mm Fraction
(Kaunas University of Technology, 2018) Pshinko, Oleksandr M.; Patlasov, Oleksandr M.; Andrieiev, Volodymyr S.; Arbuzov, Maxim; Hubar, Oleksіy V.; Hromova, Olena V.; Marcul, Ruslan V.
ENG: The results of the conducted researches on operating, physical and mechanical properties of crushed stone of 40-70 mm fraction are presented in the article as well as the results of the comparison of the given fraction with the fraction of 25-60 mm and determination of the former fraction usage for the ballast with the purpose of more rational fund use during railway repair works. The conducted researches of 40-70 mm fraction of crushed stone allowed receiving: – actual values of technical indices of the product and adopted technical decisions; – conformity of the product with the operating conditions as well as physical and mechanical properties during track maintenance; – ability to perform tests; – comparison of physical, mechanical and operational properties of crushed stone of 40-70 mm fraction with the crushed stone of 25-60 mm fraction.
Shearwalls in a Lightweight Steel Framing Buildings
(Придніпровська державна академія будівництва та архітектури, 2014) Savytsky, Mycola V.; Zinkevych, O. H.; Zinkevych, Andrii M.
EN: Dependences of influence of constructional peculiarities of shearwalls in frame buildings of LSTC on their rigidity is received. On the basis of dependences methods of estimating rigidity of shearwall of any configuration is developed, allowing to make constructional decisions for providing spatial rigidity of the building.
Simulation of Wheelset Movement in Car Dynamics Problems
(Centro Sviluppo Materiali S.p.A., 2009) Manashkin, Lev A.; Myamlin, Serhiy V.; Pshinko, Aleksandr N.
EN: The movement of the wheelset as a whole is analyzed as the forward and rotary movement of wheel rims, the forward and rotary movement of the wheelset axis together with the wheels naves, and the torsion of the wheelset. Recommendations on the choice of the torsion parameters are given.
Study of Rheological Properties of Modified Concrete Mixtures at Vibration
(Trans Tech Publications LTD, Switzerland, 2019) Pshinko, Oleksandr M.; Hromova, Olena V.; Rudenko, Dmytro V.
EN: Abstract: Study of rheological properties of concrete mixtures based on modified cement systems in order to determine process parameters. Methodology. To study structural-mechanical properties of modified concrete mixtures of different consistency at their horizontal vibrating displacement an oscillatory viscometer was designed. Results. The optimization of the process of vibration displacement of concrete mixtures with the specification of parameters of vibration impacts taking into account structural-mechanical properties of the mixture is performed. It has been established that the viscosity of the modified cement system of the concrete mixture is a variable quantity, which depends on the parameters of the vibration impacts. Scientific novelty. The mechanism of interaction of the modified concrete mixture with the form and the table vibrator during its vibration compaction is determined. On the basis of this, a model of concrete laying process control is proposed, that allows to predict the ability to form a dense concrete structure. Practical significance. Disclosed physical nature of the process of vibrating displacement of modified concrete mixtures using the principles of physical-chemical mechanics of concrete allows reasonably choose the best options for vibration impacts.
Sustainable Housing and Human Settlement
(SHEE “Prydniprovska State Academy of Civil Engineering and Architecture”, Dnipro; Slovak University of Technology, Bratislava, Slovakia, 2018) Nikolaienko, Stanislav; Kulikov, Petro; Pshinko, Oleksandr M.; Savytskyi, Mykola V.; Radkevych, Anatolii V.
ENG: This monograph presents the approaches and tools for green building, research results of assessment the potential of Europe for preservation and renovation of natural recourses to create the sustainable environment for life and industrial activity. New architectural, structmal and technological systems for construction low-rise buildings with using diffrerent materials have been considered and proposed. In the book, the technologies of energy efficient building design and construction are described. lt can be used as Urban Agenda for Regions' Sustainable Development. For researchers, university students, municipal administration, managers of business structures. This monograph was prepared with support of the Ministry of Education and Science of Ukraine in the framework of project "Scientific bases for creation of construction and agrarian clusters with a closed cycle of material and energy flows" (from 01 .01 .2017 until 31.12.2018, No. of state registration 0117U000367).
Theoretical Study of the Conditions of Combined Action of Materials of Old and New Concrete in the Repair and Restoration of the Structures of Transport Facilities
(Kaunas Univ. of Technology, Lithuania, 2019) Pshinko, Oleksandr M.; Krasnyuk, Andii V.; Hromova, Olena V.
EN: Abstract When carrying out repair work on the restoration of reinforced concrete structures of transport facilities, the technical requirements for repair compounds are determined by a number of factors, namely: adhesion and chemical compatibility of materials, compatibility with linear expansion coefficient, technology repair, cost of material, etc. Very often, the combined action of the materials of the old and the new concrete is not considered at all, although the durability and quality of the repair work depends on it. Estimation of factors that influence on structural compatibility of old and new concrete is performed in this paper. Attempt of review and choice of tools of finite element analysis with the help of which may be modeled combined action of multiplayer concrete designs is also performed.
Анализ материалов для восстановления зданий и сооружений на железнодорожном транспорте
(Днепропетровский национальный университет железнодорожного транспорта имени академика В. Лазаряна, Днепропетровск, 2007) Пшинько, Александр Николаевич; Краснюк, Андрей Витальевич; Палий, В. В.
RU: В статье приведен анализ состояния зданий и сооружений, которые эксплуатируются на железнодорожном транспорте в Украине. Описаны основные свойства известных растворов, которые могут применяться для ремонта транспортных зданий и сооружений. Показаны преимущества применения в качестве ремонтных материалов полимерцементных и цементно-полимерных растворов.
Анализ работы элементов каркасов малоэтажных зданий из тонкостенных холодногнутых профилей
(ПГАСА, Днепропетровск, 2009) Савицкий, Николай Васильевич; Зинкевич, О. Г.; Зинкевич, Андрей Николаевич
RU: В статье показана необходимость учета раскрепления листами обшивки элементов каркасов из тонкостенных холодногнутых профилей для более рационального использования сечений. Выполнено сопоставление несущей способности элементов каркаса (предельных усилий, вызывающих потерю устойчивости по разным формам) при отсутствии (или потере) раскрепления обшивкой с максимальными усилиями от нагрузок для двухэтажного здания.
Анализ существующих проблем организационно-технологической надежности кровельных систем
(Дніпропетровський національний університет залізничного транспорту імені академіка В.Лазаряна, Дніпропетровськ, 2015) Радкевич, Анатолий Валентинович; Худенко, Валерий Федорович; Глущенко, Вера Михайловна
RUS: Цель. В работе необходимо провести анализ существующих подходов к проектированию, устройству, реконструкции и капитальному ремонту кровельных систем зданий и сооружений для решения проблем их организационно-технологической надежности. Методика. Данное исследование базируется на методах аналогий, научного анализа и синтеза. Результаты. Проведен анализ инновационных технологий, а также новых строительных материалов для устройства кровельных систем. Выделены проблемы, связанные с их организационно-технологической надежностью. Обоснована актуальность решения данных проблем. Определена зависимость надежности выполненного устройства или ремонта кровельных систем от подобранной и детально проработанной технологии, а также организации выполнения работ в комплексе. Разделены все характеристики, влияющие на организационно-технологическую надежность кровельной системы, – на основные и второстепенные. Разработана концепция новой методики, учитывающей все составляющие кровельной системы в целом. Учтены требования нормативных документов Украины, а также Европы. Предложена схема организационно-технологической надежности кровельной системы с учетом факторов, формирующих надежность. Выделена острая необходимость в создании модели кровельной системы с учетом инновационных технологий и новейших кровельных материалов для выбора ее рационального варианта, отвечающего требованиям заказчика и нормативным документам, а также заданному уровню организационно-технологической надежности. Научная новизна. Впервые применено понятие «организационно-технологическая надежность» к кровельной системе. Предложено углубленное исследование этого понятия. Проанализирована зависимость надежности кровельной системы от всех ее составляющих в комплексе. Разработана концепция нового подхода к решению проблем кровельных систем. Практическая значимость. Результаты исследований могут применяться при анализе деятельности строительных организаций, занимающихся проектированием и устройством кровельных систем. Результаты исследования имеют практическую ценность в создании кровельных систем с заданной организационно-технологической надежностью.