Кафедра Будівельне виробництво та геодезія (ДІІТ) (з 2016 року приєднана кафедра "Будівельні конструкції")

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ENG: Department "Construction Industry and geodesy" 2016 Joined Department "Building Construction")

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Analytical Method for Compiling and Applying a Ballast Map for the Traction Unit PE2U
(НВП ПП «Технологічний Центр», м. Харків; Українська державна академія залізничного транспорту, м. Харків, 2019) Bannikov, Dmytro O.; Radkevich, Anatolii V.
ENG: Under practical operation, electric locomotive traction units of series PE2U quite often require, especially in recent decades, various kinds of repair, necessitating the restoration of fleet of these machines that are rather worn-out. That changes the most important indicator in the work of the machine ‒ the distribution of masses; the resulting imbalance of the machine can reach 30 %. Further operation of such a locomotive leads to a decrease in its traction by 40‒100 kN, shortens the service life of the undercarriage by 8‒10 years on average, as well as requires that the speed of the machine during operation should be reduced by 10‒15 km/h. Given the lack of an appropriate regulatory framework and of recommendations in the specialized literature, such balancing operations are actually performed iteratively, with an arbitrary arrangement of ballast elements, which often delays the duration of operations and leads to their poor quality. One of the possible solutions to resolve this issue is the development and implementation of a special theoretical method that would make it possible to analytically substantiate the proposed structural-technological solutions related to the arrangement of a ballast at the electric locomotive traction unit PE2U. In this case, the ballast is composed of individual small-size elements that are stacked in rows into existing structural cavities in a bearing frame. The result is a compiled so-called individual ballast map for each machine. The proposed approach includes two stages of calculations and makes it possible to not only obtain practically acceptable ballast location diagrams, but to also significantly reduce the number of weighings required for the machine. The approach has been tested on several machines at electric locomotive traction units of PE2U over 2010‒2012 and could be officially used in the specialized regulatory documentation. Its practical error does not exceed 3 % and is mainly predetermined by technological factors.
Controlling the Dynamic Characteristics of Steel Bunker Containers for Bulk Materials
(IOP Conference Series: Earth and Environmental Science, 2024) Bannikov, Dmytro O.; Tiutkin, Oleksii L.; Hezentsvei, Yukhym; Muntian, Antonina O.
ENG: The article presents the main results of research devoted to the definition and analysis of the dynamic characteristics of steel small-sized bunker containers for storing bulk materials. All studies were carried out using the finite element method with the use computer complex SCAD. The object of research was a bunker of a bypass track for feeding bulk materials with a total volume of up to 70 m3. The study analysed the natural partial frequency spectrum and the partial oscillation modes of individual load-bearing elements of the bunker. Based on the results of the data analysis, a rather high quantitative density of the natural frequency spectrum was determined. At the same time, its lower limit is about 25-30 Hz for an empty bunker capacity and decreases to 3-5 Hz when the bunker is fully loaded, which is dangerous from the point of view of the possibility of resonance phenomena. In order to qualitatively and quantitatively control the dynamic characteristics, it was proposed to change the steel strength of the structure, which made it possible to change the natural frequencies by about 15% for every 100 MPa change in steel strength for the bunker containers of the considered type.
Development of Dynamic Integral Evaluation Method of Technical State of One-Section Electric Locomotive Body
(НВП ПП «Технологічний Центр», м. Харків; Українська державна академія залізничного транспорту, м. Харків, 2020) Bannikov, Dmytro O.; Yakovliev, Serhii O.
ENG: At present, one of the main problems arising from the long-term operation of one-section electric locomotives is the need to maintain their good technical condition. In this case, the determining aspect is often rapid identification of existing defects and damage to the main bearing structural elements of machine bodies, as well as preventing their development into more serious structural deviations. The aim of the study is to develop a specialized method that allows identifying defects of the main bearing structural elements of the bodies of one-section electric locomotives at the early stages of emergence and development. This method of dynamic integral evaluation is based on the analysis of partial dynamic spectrum of the electric locomotive. Based on the magnitude of the spectrum deviation relative to the theoretical one obtained from finite element modeling, it is possible to determine the approximate nature and location of damage, especially latent. The frequency spectrum of the main bearing structural elements of the bodies of one-section electric locomotives obtained in the course of the studies is rather dense and lies in the frequency range up to 20 Hz. The presence of damage reduces its value, and for the most common types of defects, this reduction is 25–30 %. The effectiveness of the practical application of the dynamic integral evaluation method is illustrated by the example of the DS3-008 machine. The method revealed hidden damage to one of the elements of the bearing frame of the front surface of the cab, which was not revealed during the standard maintenance procedure of the machine. The use of the method of dynamic integral evaluation of the technical condition of electric locomotives is quite versatile and can also be recommended for other units of railway rolling stock. In practice, the introduction of this approach will effectively prevent the development of emergencies.
Dynamic Properties of One-Storey Industrial Building
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2020) Rozumenko, D. V.; Bannikov, Dmytro O.
EN: Purpose. Recently, there has been a growing demand in Ukraine for the reuse of industrial buildings that have not been in exploitation for a certain period of time. At the same time, there are frequent cases when new technological equipment transfers significant dynamic loads to existing structures over a long period of time. Since the available data regarding the dynamic properties of industrial buildings are now practically absent, the main goal of the studies made by the authors is to evaluate and analyze own dynamic characteristics of a one-storey industrial building. Methodology. To achieve this goal, it was necessary first to choose the type of industrial building, which is common enough for the formulated conditions of the reuse possibility. A one-storey unheated industrial building with three purlins (purlins 15 + 15 + 6 m) with a steel supporting frame was taken as such a building. In the course of research, the cross sections of the main load-bearing elements were varied, as well as the schemes of their connection with each other. The calculations were carried out by the finite element method based on the Lira for Windows project complex. Findings. The obtained frequency spectra of the own dynamic characteristics for the main bearing structural elements of an industrial building of the type in question are in the range up to 30 Hz. Also, during the research, dependencies were obtained for changing this range for various cases of design decisions of the building. Originality. The research results presented in the publication make it possible to evaluate the range of the own dynamic characteristics of single-storey multipurlined unheated industrial buildings with the traditional structural solution of the steel frame. Practical value. The resulting range of the own dynamic characteristics of the industrial building of the type in question is quite dangerous for human health. The most unfavorable is the oscillation form of the columns, which actually involves the entire structural frame. Therefore, in the course of research, a special method was developed and tested to stabilize such vibrations «on the base» using flexible ropes.
Effectiveness Evaluation of Steel Strength Improvement for Pyramidal-Prismatic Bunkers
(OÜ «Scientific Route», 2020) Hezentsvei, Yukhym; Bannikov, Dmytro O.
EN: In accordance with the recommendations of specialized professional literature, steel pyramidal-prismatic bunkers are projected for a service life of 20 years. However, in practice this term is often twice, or even three times lower. This is especially true for complicated operating conditions, in particular the effect of increased loads and low temperatures. Existing design techniques for such structures, both in European practice and the design practice of Ukraine and other CIS countries do not pay attention to these aspects. Therefore, in the practice of operation, the increased accident rate of steel bunker capacities has already become virtually a common occurrence. One of the possible ways to solve this problem is presented, which consists of using instead of traditional steels of ordinary strength with high plastic properties, steels of increased or high strength with reduced plastic properties. At the same time, clear theoretical recommendations are provided for choosing the right steel depending on the operating conditions, primarily when exposed to increased loads. The recommendations are presented in a form convenient for practical engineering applications. The proposed approach allows to reduce the material consumption of structures of this type on average according to theoretical estimates by 25-30% without reducing their bearing capacity. Their durability is also further enhanced by improving performance at low temperatures. Thus, the applied aspect of such a solution to this above problem is the possibility of increasing the overall reliability of steel bunker capacities, as well as reducing the cost of their periodic maintenance and repair work. A practical illustration of the presented approach is also given on the example of the design of bunkers of a bypass track for supplying charge materials for blast furnaces of one of the metallurgical plants of the northern location. As a result, this created the preconditions for monetary savings of about 0.5 million UAH in prices 2019 (about 20,000 USD)
Efficiency Estimation of the Shaped Hot Rolled Steel Product Mix of India and Ukraine
(Національний університет будівництва і архітектури, Київ, 2019) Gaidaichuk, Victor V; Bannikov, Dmytro O.; Radkevych, Anatolii V.; Muntian, Antonina O.
ENG: The publication presents main results of the performed quantitative and qualitative analysis of modern shaped rolled metal products of India, which is used for structural steel members. Its efficiency was compared to the current domestic product range of Ukraine on the example of angle bars, channel sections and flanged beams. Special attention is paid to the system of designations and marking of product mix items. The publication presents the main results of the quantitative and qualitative analysis of the modern hot rolled steel assortment of India, which is used for steel building structures. The shaped hot rolled steel products are considered, represented in the standards of both countries by four types of profiles – equal leg angles, unequal leg angles, channel and beams. Special attention is paid to the system of designations and labeling of products of the assortment. In general, it should be noted that the overall organization and principle of construction of the analyzed assortments of India and Ukraine are quite similar. The main fundamental difference is the availability in the standard of India of a wider range of profile varieties within one step, which makes it possible to more efficiently choose the required section in the design. However, the step itself is widely than in domestic standards, which negates such dignity. Angels profiles in the Indian assortment have a wider range of thicknesses and are represented by a large number of sizes, especially for unequal leg angles, which is connected with a significant distribution of such profiles in the supporting elements of steel structures. Channel profiles in general have approximately the same degree of efficiency and the number of standard sizes in the assortments of both countries. In the standard of India, profiles with flange slopped shelves are displayed in more way and, in the domestic standard, with parallel shelves. Beam profiles have the largest number of sizes in both assortments, but unlike the domestic standard in India's standard, they are presented only in cross-sections with flange slopped shelves. In this case, the profiles aimed at bending, according to the domestic assortment have specific characteristics averaged on 15 – 40 % higher with a less on 30 – 40 % by weight. For profiles of heavy series, oriented also on the perception of longitudinal forces, sections in the Indian assortment have higher specific characteristics and less weight on average by 20 – 30 %.
Geotechnical Analysis of Optimal Parameters for Foundations Interacting with Loess Area
(EDP Sciences, 2020) Dubinchyk, Olha I.; Bannikov, Dmytro O.; Kildieiev, Vitalii R.; Kharchenko, V.
EN: The article highlights results of the geotechnical analysis of the stress and strain state for the base of a subsoil massif under its interaction with the strip foundations. The massif is represented by loess soils which while soaking give overtime subsidences that complicate the operation of a building or a structure. Through geotechnical iterative research, optimization of the parameters for strip foundations on four axes at a four-storeyed residential building is carried out. Checks are performed on two groups of limiting states for scenarios of soil occurrence in natural, moistened and compacted states. The optimum dimensions in the width of strip foundations are selected, they give approximately the same strain values of the base after the creation of the soil bedding with its layer-by-layer compaction. The relevance of this research is to develop optimal parameters in the design of strip foundations for shallow depth on subsidental loess soils.
Modelling of the Electric Locomotion DS3 Working
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Bannikov, Dmytro O.; Radkevich, Anatoliy V.; Muntian, Antonina O.
ENG: Abstract. The purpose of the work is to evaluate the spatial distribution of the rigidity of the carrier frame and the body of the Ukrainian electric locomotive DC3 as a single system during operation and repair. The research was carried out on the basis of the finite element method with the application of design and computing complex SCAD for Windows. The numerical model of the electric locomotive was built, tested and then used to identify the causes and providing guidance on solving some specific operational questions. They are included, for example, the possibility of eliminating the body skew when jacking up on jacks and jamming the door as a result. The researches showed that the structure of the electric locomotive DS3 in general has a rather high spatial rigidity, both in transverse and longitudinal directions, and on torsion. However, for some practical repair tasks there is not enough for that rigidity. It was recommended to increase the thickness of the shell of its body up to 4 mm or the roof up to 8 mm, which leads to an increasing in the total mass of the machine by about 2,5 and 3,5 tons, respectively.
Modernization of the Buffer Beam of PE2U Traction Unit Electric Locomotive
(IOP Publishing, 2020) Bannikov, Dmytro O.; Radkevich, Anatolii V.; Muntian, Antonina O.
ENG: The article presents the main results of a theoretical study on the analysis of the stress-strain state of the construction of the buffer bar of the electric locomotive for the control of the traction unit PE2U. The estimation of the possibility and effectiveness of attachment on the front wall of the buffer beam of a special securing bracket was considered as a separate task. In both cases, the finite element method based on the SCAD for Windows computing system was used. As a result, it was found that in general, the design of the buffer beam does not meet the requirements of the current standards. Up to 5 zones of high stress concentration are present in the structure, which, given the long service life of the machines (up to 40-50 years), are potential places for the development of fatigue damage. In order to balance the stress level, we recommended to strengthen the contact zone of the supports under the automatic coupling with the system of horizontal truss plates. The additional recommendation is to reinforce the lower sheet of the buffer beam structure up to and including its replacement by a sheet of greater thickness. Attachment to the front wall of the buffer beam of a special securing bracket for holding in emergency mode the coupling of the locomotive-car is possible provided that this zone is strengthened by the system of additional truss plates. The total increase in the mass of the buffer beam reaches 350 kg (25 % of the original weight of the buffer beam structure).
Outlooks of Using DBN B.2.6-161:2017 «Wooden Structures» in Design Practice
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2019) Bannikov, Dmytro O.
EN: Purpose. From 01.02.2018, the new state standards DBN B.2.6-161:2017 were introduced into the wooden structures design practice. They replace the recently prepared codes DBN B.2.6-161:2010, which, in turn, were elaborated to replace the SNiP II-25-80. The author of this publication would like to draw the attention of develop-ers and potential users of the codes DBN B.2.6-161:2017 to the points that are not entirely clear, which at first read-ing caused him certain difficulties in terms of their practical use. Methodology. The practical experience accumu-lated by the author in the use of normative literature in educational practice, as well as the available experience dur-ing laboratory studies with students, made it possible to estimate the recently introduced codes DBN B.2.6-161:2017 from a practical point of view. Findings. In general, the new codes, recently introduced into design practice, are progressive both in their content and in terms of their use in construction practice. However, the existing problem areas in these standards, which are considered in this publication, in our opinion, can significantly limit the possibil-ity of their wide practical application. Originality. The analysis of recently introduced new standard was carried out by the author of the publication not only in terms of assessing quality requirements and recommendations, but also in terms of the quantitative aspect of the issue. Practical value. The author’s experience in calculating simple ele-ments and basic types of connections according to the new codes DBN B.2.6-161:2017 indicates that the bearing capacity determined for various cases is lower on average by 1.5 – 3 times than according to the previous codes SNiP II-25-80. From a practical point of view, this revealed discrepancy means that the already constructed struc-tures may require some reinforcement or reconstruction, and new designed structures should have large bearing sec-tions of the elements and, accordingly, large bearing capacity and weight.
Prospective Directions of the Development of Loose Medium Mechanics
(Національна академія наук Укрaїни, Київ, 2020) Bannikov, Dmytro O.; Tiutkin, Oleksii L.
ENG: At present, in the field of loose medium mechanics there is a rather serious key problem, the absence of a universal theoretical concept for considering the behavior of the loose medium under different practical conditions. Such situation significantly impedes the further development of this industry, since theoretical models of bulk material, which now have been counted about 30, practically conflict with each other. Problem Statement. In practice, such problem leads to numerous cases of failures of structures of various types, as a result of errors in determining the loads from the bulk material. Purpose. Identification and formulation of the main directions of the further development of loose medium mechanics as a separate section of soil mechanics in the composition of geotechnical mechanics. The development of these directions is a solution for overcoming the problem of creating a unified theoretical model of loose medium. Materials and Methods. The systematization and the synthesis of the accumulated information on loose medium mechanics and the development of a universal approach to describing its behavior is the main method to achieve the formulated purpose. Results. Researching in three directions is the main prerequisite for the formation of the concept of loose medium. These directions are the determination of the properties of loose materials; the determination of the pressure ratio; and the development of a model for packing grains of loose material. Conclusions. The discrete-continuum approach shall be basic concept for developing the unified theoretical model of loose medium. At the same time, all properties of loose medium are determined on the basis of its discrete nature; the equations of static equilibrium and the dynamic motion of the loose medium are formed considering it as a homogeneous continuum within a certain volume. Also, the static behavior of loose medium shall be analyzed as a partial case of its dynamic behavior rather than as an individual task with its own parameters.
Rational Altitude Structure for Placing the Wind Equipment in the Conditions of Ukraine
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2018) Savchenko, R. A.; Bannikov, Dmytro O.; Kyrpa, Ivan I.
EN: Purpose. For wind observations special wind equipment is used, which should be placed at a certain height above the ground for a relatively short period of time. Such equipment can be transferred from one region to another. Therefore, the main purpose of the studies outlined in the publication is the selection and justification of the construction of a mobile altitude structure for the placement of wind equipment in the natural and climatic conditions of Ukraine. Methodology. To achieve this purpose, first we chose the type of altitude structure from the existing ones. Next, we determined the nature of the effect of natural and climatic loads on these structures in accordance with the norms of Ukraine. After this, we performed a numerical analysis of the work of altitude structures by the finite element method on the basis of the Lira software. Also, an economic evaluation of the expediency of using altitude structures of a certain type was made, taking into account the lease of the land plot for their location. Findings. According to the results of the conducted studies, it should be noted that for the conditions of Ukraine a steel tower is the most rational mobile altitude structure for placing wind equipment for a relatively small interval of time. In comparison with a steel mast of a similar height, the total cost of its installation and operation is lower. The X-cross brace for steel towers from 50 to 60 m in height is more rational than the K-brace. Herewith, its usage decreases the construction cost almost by half. Taking into account the possibility of transportation, the separation of the steel tower into assembly units of 8-10 m in length is the most effective. Originality. The authors proposed the method for estimating the economic efficiency of choosing a mobile altitude structure depending on the natural and climatic conditions of the terrain. In accordance with this method, the most rational type of altitude structure is determined taking into account its mobility. Practical value. Application of the proposed approaches and the solutions allows reducing the time required for calculations in design practice and also more reasonably approaching the choice of design solutions for altitude structures.
Rational Design of Short-Span Industrial Building Roof for Reconstruction Conditions
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2019) Kruhlikova, Nadija G.; Bannikov, Dmytro O.
EN: Purpose. Recently, the demand for reuse of industrial buildings that have not been in operation for some time has been increasing in Ukraine. Herewith, quite often the design of their roof requires the complete replacement and renovation by using modern roofing materials to meet the requirements of new government standards. Therefore, the choice and justification of the rational design of steel roof on the example of a short-span industrial building (18-24 m span), which is planned to be returned to exploitation after idle time, is the main goal of this publication. The object of the analysis is an unheated building equipped with bridge cranes of a small capacity (up to 10 tons). Methodology. To achieve this purpose, the comparison of structural variants of a roof steel collar tie was per-formed. Such variants include two types of collar tie cross-section – a lattice truss and a solid I-girder. The first type was analyzed for four possible types of section of elements – double angles, a roll-welded square profile, an electric-welded round tube and a rolled round tube. The second type was analyzed for two possible types of section – rolled I-section made of normal strength steel and fabricated sections of thin-gage high-strength steel. The design variants were compared on the basis of a numerical analysis of their work using the finite element method based on the soft-ware complex SCAD for Windows. Findings. According to the research results it should be stated that for the con-ditions of the city of Dnipro the most cost-effective variant of the steel collar tie cross section for the short-span in-dustrial building is the truss made of electric-welded round tubes. Also the construction of collar tie made of roll-welded square profiles or fabricated section of thin-gage high-strength steel is considered quite effective. Originality. The research presented in the publication allows estimating the possibility and economic efficiency of usage for various types of cross-sections for the collar tie of a steel non-insulated roof of the industrial building for the reconstruction conditions in the Dnipro-city. Practical value. A practical estimation of mass and cost parameters for steel collar ties of various types has been carried out, and the methodology for conducting such estimation has been substantiated.
Regularities of the Deformed State of the Geotechnical System “Soil Base – Micropile”
(IOP Publishing Ltd, 2022) Petrenko, Volodymyr D.; Bannikov, Dmytro O.; Kharchenko,Vitalii; Tkach, Taisiia
ENG: Definition and predicting the deformed state of the geotechnical system "soil base – micropile" are the relevant scientific and technical objective when strengthening the soil base by reinforcing elements. The complexity of solving such a problem lies in the heterogeneity of the deformation characteristics for the parts of the specified system. The application of mathematical modeling based on the finite-element method allows defining the behavior of the deformed state in the geotechnical system "soil base – micropile" in the variation of the elastic modulus of its elements. In the course of the numerical analysis of twenty finite-element models characterized by a change in the elastic modulus of the micropile material and soil base, the value of maximum vertical displacements of the strip foundation for the civil structure is obtained. The generalization of these values makes it possible to construct diagrams of their changes in accordance with the variation of the elastic modulus. The obtained regularities allow predicting a deformed state for a sufficiently wide range of the elastic modulus for elements in the system "soil base – micropile".
Static Continuous Bulk Material Model for Inclined Bunker Section
(Dnipro University of Technology, 2025) Radkevytch, Anatolii V.; Bannikov, Dmytro O.; Wu, H.; Cheng, X.
ENG: Purpose. Obtaining an analytical pattern of pressure distribution of bulk material based on the classical Jansen’s model for an inclined outlet part of a hopper with an arbitrary cross-sectional shape. Methodology. The work used a set of research methods, including scientific analysis and synthesis of available technical information regarding the current regulatory and professional approaches to determining the pressure from bulk material in container structures. Computer modeling methods based on the numerical method of structural mechanics ‒ the finite element method ‒ were also used. Analysis of the performance of structural options was carried out using the SCAD design and computing complex (Ukraine). A separate direction in the work was design developments, which included methods for engineering assessment of the accuracy and reliability of the results obtained. Findings. An analytical expression for determining the vertical pressure of bulk material is obtained, which reflects in a closed form the regularities of its distribution for the case of a straight inclined rigid wall of the outlet part of the hopper container with an arbitrary cross-sectional shape. The pressure value of the bulk material according to this expression quantitatively exceeds the pressure value according to known analytical models. This gives grounds to believe that when loading the hopper structures, a change in the structure of the bulk material occurs, which is described in the literature as its loosening. Originality. The conducted researches allowed for the first time to establish the regularities of the pressure distribution of bulk material during static operation of a hopper structure with straight inclined walls. The obtained expression is structurally the product of two power functions, in which the exponent is the expressions that reproduce the geometry of the outlet part of the hopper structure and the material of its side walls. Practical value. The obtained expression allows to calculate the vertical and, if necessary, normal pressure of bulk material for straight inclined walls of hopper structures. It is proved that the pressure increases significantly with increasing its depth, which in the case of unloading the container should lead to the destruction of the static form of laying of bulk material. The developed model is the basis for a more detailed consideration of the characteristics of bulk material, such as the density of laying or the angle of laying.
Substantiating the Parameters for a Non-Circular Structure of the Mine Shaft under Construction in a Heterogeneous Rock Massif
(IOP Publishing Ltd, 2022) Alkhdour, Ahmad M.; Tiutkin, Oleksii L.; Bannikov, Dmytro O.; Heletiuk, Ihor
ENG: Mine shafts are those workings without which the normal operation of coal enterprises and underground construction facilities is impossible. The new experience in the construction of mine shafts for the Dnipro Metro is based on the rejection of prefabricated structures. In addition, the ellipse structure of the mine shaft 15 bis of the Dnipro Metro is uncharacteristic for construction in Soviet and post-Soviet Ukraine. That is why technological advancements in the design of vertical workings for the non-circular structure require scientific justification. The complexity of operating such underground facilities under the engineering and geological conditions in the city of Dnipro is the interaction with a heterogeneous massif. Therefore, the design of the mine shaft frame involves its division into parts (the so-called pile system and shotcrete system). The finite-element models of both systems have been developed. A search for the force factors in a non-circular structure of the shaft has been carried out; the parameters for both systems have been substantiated. The results of the analysis have made it possible to scientifically substantiate the structural solutions. They enable the prediction of high strength indicators of the mine shaft under construction in a heterogeneous rock massif.
Use of Fine-Grained Heat-Strengthened Steels to Increase the Operation Qualities of Bunker Capacities from Thin-Walled Galvanized Profiles
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2021) Hezentsvei, Yukhym I.; Bannikov, Dmytro O.
EN: Purpose. The work is aimed to study the use efficiency of fine-grained heat-strengthened steels (mainly 10G2FB) for steel bunker capacities. At the same time, the structural scheme of such a structure using corrugated steel sheets is considered as the main variant. Methodology. To achieve this purpose, a series of numerical calculations was carried out for a steel bunker capacity of a pyramidal-prismatic type with overall dimensions in plan view of 6×5.2 m and a total height of 4.5 m. The capacity was designed for complicated working conditions, in particular, increased loads, including long-term dynamic ones. The potential possibility of operating the container under conditions of high or low temperatures was also taken into account. At the same time, both the traditional structural scheme of a bunker capacity with horizontal stiffening ribs and the developed structural scheme based on corrugated steel sheets were analyzed. The calculations were carried out by the finite element method based on the SCAD for Windows project complex. Findings. Based on the results of the analysis and comparison of the data obtained in numerical calculations, it was found that the use of fine-grained heat-strengthened high-strength steels (for example, steel 10G2FB) for bunker capacities, both the traditional structural scheme with stiffening ribs and the developed structural scheme based on corrugated sheets, allows reducing material consumption by about 30% in both cases. At the same time, due to the good performance of fine-grained heat-strengthened steel 10G2FB, both at high and at low temperatures, it can be effectively used for steel bunker capacities that work in difficult conditions. Originality. The possibility and efficiency of the use of fine-grained, heat-strengthened high-strength steels for the construction of a steel bunker capacity is estimated. At the same time, such an estimation was given not only for structures of the traditional structural scheme with horizontal stiffening ribs, but also for bunkers with a developed structural scheme based on corrugated sheets. Practical value. From a practical point of view, quantitative parameters of the stress-strain state were obtained during investigations of various design variants for a steel bunker capacity. The data are presented in a compact form that is easy to evaluate and compare. They allow us to state about the improvement of the operation characteristics of capacities and the potential reduction of the risks of their failures and accidents during operation.