Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-5-179-20-26
O. Hromyk, O. Semenda
These studies analyzed the structure of meat production, outlined the share of sales of meat and meat products produced in Ukraine. The volume of meat export and import in time dynamics was studied in detail. It was established that the meat and meat products consumption fund fully meets the needs of the domestic market. Poultry production dominates in Ukraine. In recent years, our country has turned from an importer of this type of meat into an exporter. Chicken production has a number of competitive advantages compared to other types of meat, including the shortest raw meat procurement cycle and the lowest price. As a result, in recent years, the demand for this type of meat has been steadily growing both on the domestic and global markets. In general, the positive dynamics of poultry meat production in Ukraine indicates prospects for further expansion of its export. The volume of poultry meat exports increased to 459,000 tons. The poultry industry of Ukraine suffered significant losses due to the war and active hostilities, but at the same time, exporters managed to maintain the indicators of foreign sales at a typical level. The standard of living of the population affects the meat market, as an important component of the food market of Ukraine. The most important food products include meat and meat products. It has been studied that despite the full-scale invasion of Russia into Ukraine, producers are increasing the volume of meat products despite the decline of certain industries. The structure of the meat market is undergoing restructuring. Restaurants are expanding their range of poultry dishes. The increase in consumption is due to the growth of demand and the low solvency of the population, as the most available type of meat. However, the growth of citizens' incomes will be a significant factor in increasing the consumption of meat products, which will clearly determine the need to intensify the development of the livestock industry. Prospects for further research should be implemented in the field of development of enterprises participating in the meat products market in Ukraine. Keywords: restaurants, consumption, meat, meat products, export, import.
{"title":"MEAT CONSUMPTION IN UKRAINE: REALITIES AND PROBLEMS OF DEVELOPMENT","authors":"O. Hromyk, O. Semenda","doi":"10.33042/2522-1809-2023-5-179-20-26","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-5-179-20-26","url":null,"abstract":"These studies analyzed the structure of meat production, outlined the share of sales of meat and meat products produced in Ukraine. The volume of meat export and import in time dynamics was studied in detail. It was established that the meat and meat products consumption fund fully meets the needs of the domestic market. Poultry production dominates in Ukraine. In recent years, our country has turned from an importer of this type of meat into an exporter. Chicken production has a number of competitive advantages compared to other types of meat, including the shortest raw meat procurement cycle and the lowest price. As a result, in recent years, the demand for this type of meat has been steadily growing both on the domestic and global markets. In general, the positive dynamics of poultry meat production in Ukraine indicates prospects for further expansion of its export. The volume of poultry meat exports increased to 459,000 tons. The poultry industry of Ukraine suffered significant losses due to the war and active hostilities, but at the same time, exporters managed to maintain the indicators of foreign sales at a typical level. The standard of living of the population affects the meat market, as an important component of the food market of Ukraine. The most important food products include meat and meat products. It has been studied that despite the full-scale invasion of Russia into Ukraine, producers are increasing the volume of meat products despite the decline of certain industries. The structure of the meat market is undergoing restructuring. Restaurants are expanding their range of poultry dishes. The increase in consumption is due to the growth of demand and the low solvency of the population, as the most available type of meat. However, the growth of citizens' incomes will be a significant factor in increasing the consumption of meat products, which will clearly determine the need to intensify the development of the livestock industry. Prospects for further research should be implemented in the field of development of enterprises participating in the meat products market in Ukraine. Keywords: restaurants, consumption, meat, meat products, export, import.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-280-285
P. Korchagin, S. Eremenko, A. Khmyrova, I. Khmyrov, O. Shevchenko, R. Shevchenko
The work examines the field of problems of training specialists in the operation of emergency and rescue equipment in the conditions of uncertainty of the process of receiving and modernizing the latter. During the hostilities, the system of training specialists of the State Emergency Service faced a number of challenges that significantly affected the quality of knowledge and skills that graduates of higher education institutions receive. If the problem of the issue is considered only in the part of the training of specialists in the operation of emergency and rescue equipment, then the following should be noted. A stable structural and logical scheme of the process of coordination and improvement of the efficiency of the system of training specialists in the operation of emergency and rescue equipment provides for the presence of a mandatory procedure for the coordination of operational and technical parameters of emergency and rescue equipment and the methodology of training specialists in its operation. It has been proven that today there is a range of additional tasks related to both the organization of material support of units of the State Emergency Service and the process of training and retraining of specialists in the operation of equipment and technical means. In order to comprehensively solve the mentioned issues, it is necessary to form an effective methodology for provision and training, taking into account the experience of domestic and international researchers and the principles and criteria of NATO. A structural and logical scheme of the methodology for increasing the effectiveness of the process of preventing emergency situations in conditions of uncertainty of the parameters of the training of specialists and the operation of emergency rescue equipment has been formed, which consists of 6 procedures, the application of which is limited to the field of regional conditions for the use of emergency rescue equipment and are related to each other directly and feedback, which in the end allows to further unify the process of training specialists taking into account experience and NATO standards. Keywords: structural and logical scheme, operation, emergency rescue equipment, emergency situation, training of specialists.
{"title":"PROBLEMS OF THE PROCESS OF LIQUIDATION OF EXTRAORDINARY SITUATIONS AT THE REGIONAL LEVEL UNDER THE CONDITIONS OF MILITARY INFLUENCE ON THE SYSTEM OF TRAINING SPECIALISTS IN THE OPERATION OF EMERGENCY AND RESCUE EQUIPMENT","authors":"P. Korchagin, S. Eremenko, A. Khmyrova, I. Khmyrov, O. Shevchenko, R. Shevchenko","doi":"10.33042/2522-1809-2023-4-178-280-285","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-280-285","url":null,"abstract":"The work examines the field of problems of training specialists in the operation of emergency and rescue equipment in the conditions of uncertainty of the process of receiving and modernizing the latter. During the hostilities, the system of training specialists of the State Emergency Service faced a number of challenges that significantly affected the quality of knowledge and skills that graduates of higher education institutions receive. If the problem of the issue is considered only in the part of the training of specialists in the operation of emergency and rescue equipment, then the following should be noted. A stable structural and logical scheme of the process of coordination and improvement of the efficiency of the system of training specialists in the operation of emergency and rescue equipment provides for the presence of a mandatory procedure for the coordination of operational and technical parameters of emergency and rescue equipment and the methodology of training specialists in its operation. It has been proven that today there is a range of additional tasks related to both the organization of material support of units of the State Emergency Service and the process of training and retraining of specialists in the operation of equipment and technical means. In order to comprehensively solve the mentioned issues, it is necessary to form an effective methodology for provision and training, taking into account the experience of domestic and international researchers and the principles and criteria of NATO. A structural and logical scheme of the methodology for increasing the effectiveness of the process of preventing emergency situations in conditions of uncertainty of the parameters of the training of specialists and the operation of emergency rescue equipment has been formed, which consists of 6 procedures, the application of which is limited to the field of regional conditions for the use of emergency rescue equipment and are related to each other directly and feedback, which in the end allows to further unify the process of training specialists taking into account experience and NATO standards. Keywords: structural and logical scheme, operation, emergency rescue equipment, emergency situation, training of specialists.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135452908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-113-117
M. Kunytskiy
Use of water resources and wastewater treatment on a global scale. For various areas of use, appropriate water quality and purification is required. But in connection with the ecological situation in various countries of the world and the economic situation, which is developing in 2023 and beyond, it is worth noting that it leads to a global emergency. Instability of wastewater treatment parameters in various regional and global basins. The obsolescence of water purification processes and mechanisms prompts humanity to search for new methods of purification and disposal of accumulated pollution. The financial sector is experiencing a significant downturn and is pushing global stock exchanges into economic depression and the possible collapse of currency charters in the system of central banks. The change in the reserve currency and the value of currencies in the world financial sphere is already setting a new trend in the distribution and redistribution of economic markets. The further development of technology and science in general requires the search for new funding sectors, platforms for the use of financial niches and a globally accessible calculation and earning sector for scientists. Heat recovery and wastewater treatment is becoming a key issue in the field of water resources. Among the local sources of purification, which are gaining great popularity and special need in our country. Biological processes of water purification are quite dependent on temperature changes. It has been observed that when there is a rapid drop in temperature over a period of several hours, the hydraulic retention of the CB acts as a buffer for the temperature in the tanks, resulting in the stabilization of the biological process. In the research, the search for a project with a quick payback period and low cost with provision of hot water supply appears. Implementation of technologies for utilization of heat from the environment and income for the benefit of communities and condominiums. The further calculation of the project should have a tendency, regarding the universality and practicality of its implementation, to be economically competitive and to bring improvements to the public sector. One of the first steps in the development of networks is the need for data. Work with data can be carried out in two ways: visualization and arrangement of data based on tabular forms in combination with existing maps, as well as with the development of a spatial display of objects, in combination with attributive data, for other operations and system interaction. Based on the data, it is possible to determine the location of boiler houses, CTP and ITP, as well as the distance of consumers from them. The distance between houses can serve as the main characteristic for dividing consumers into zones, which, in turn, will reflect the situation with high-quality provision of domestic hot water. After analyzing the data, it was found that some houses contain several connections
{"title":"GEOSPATIAL DISTRIBUTION OF CITY INFRASTRUCTURE FOR THE PRACTICAL APPLICATION OF HEAT PUMPS","authors":"M. Kunytskiy","doi":"10.33042/2522-1809-2023-4-178-113-117","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-113-117","url":null,"abstract":"Use of water resources and wastewater treatment on a global scale. For various areas of use, appropriate water quality and purification is required. But in connection with the ecological situation in various countries of the world and the economic situation, which is developing in 2023 and beyond, it is worth noting that it leads to a global emergency. Instability of wastewater treatment parameters in various regional and global basins. The obsolescence of water purification processes and mechanisms prompts humanity to search for new methods of purification and disposal of accumulated pollution. The financial sector is experiencing a significant downturn and is pushing global stock exchanges into economic depression and the possible collapse of currency charters in the system of central banks. The change in the reserve currency and the value of currencies in the world financial sphere is already setting a new trend in the distribution and redistribution of economic markets. The further development of technology and science in general requires the search for new funding sectors, platforms for the use of financial niches and a globally accessible calculation and earning sector for scientists. Heat recovery and wastewater treatment is becoming a key issue in the field of water resources. Among the local sources of purification, which are gaining great popularity and special need in our country. Biological processes of water purification are quite dependent on temperature changes. It has been observed that when there is a rapid drop in temperature over a period of several hours, the hydraulic retention of the CB acts as a buffer for the temperature in the tanks, resulting in the stabilization of the biological process. In the research, the search for a project with a quick payback period and low cost with provision of hot water supply appears. Implementation of technologies for utilization of heat from the environment and income for the benefit of communities and condominiums. The further calculation of the project should have a tendency, regarding the universality and practicality of its implementation, to be economically competitive and to bring improvements to the public sector. One of the first steps in the development of networks is the need for data. Work with data can be carried out in two ways: visualization and arrangement of data based on tabular forms in combination with existing maps, as well as with the development of a spatial display of objects, in combination with attributive data, for other operations and system interaction. Based on the data, it is possible to determine the location of boiler houses, CTP and ITP, as well as the distance of consumers from them. The distance between houses can serve as the main characteristic for dividing consumers into zones, which, in turn, will reflect the situation with high-quality provision of domestic hot water. After analyzing the data, it was found that some houses contain several connections","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-293-298
V. Tishchenko, O. Lohvinenko, M. Odegov
The article is devoted to highlighting the peculiarities of determining the frequencies of natural oscillations of the elements of the mechanical system of modern rolling stock. A significant volume of passenger transportation in suburban traffic on railway networks of Ukraine is carried out by the operating fleet of rolling stock, most of which are operated overtime. Taking into account the relatively slow pace of renewal of Ukrzaliznytsia's rolling stock fleet, scientific research aimed at maintaining a high level of technical and economic indicators of electric trains in operation becomes especially important. Therefore, research aimed at improving performance indicators of structural elements of rolling stock should be considered relevant. As one of the most responsible units of the mechanical system of modern rolling stock, the crew part can be singled out, which includes a traction electric drive, during the operation of which the phenomenon of jolts is observed in some modes of operation. Such a phenomenon is observed in resonant modes of operation, that is, the coincidence of the frequencies of natural and forced oscillations, which negatively affects the reliability and durability of the mechanical system as a whole. Therefore, the task of identifying resonant frequencies and eliminating the manifestation of the negative phenomenon of resonance arises. One of the possible ways to solve the given problem is to adjust the operation of the traction drive mechanism in non-resonant modes, which in turn requires research on the torsional oscillations of the mechanical drive system. The article presents an approach using geometric models of the design elements of the traction drive of electric trains, the corresponding mathematical model, and the results of modeling the shape of the frequency of natural oscillations of the traction drive of an electric train. Based on the results of the calculations, it was determined that the form of natural oscillation frequencies of the considered mechanical system has a two-node character. The proposed approach is based on the use of a tabular form of calculation of recurrent formulas. Based on the results of the research, recommendations are given for the further use of the obtained results. Keywords: motor-wagon rolling stock, electric train, traction drive, self-oscillations.
{"title":"DETERMINATION OF THE FREQUENCY OF NATURAL OSCILLATIONS OF THE ELEMENTS OF THE MECHANICAL SYSTEM OF THE MOTOR CARRIAGE ROLLING STOCK","authors":"V. Tishchenko, O. Lohvinenko, M. Odegov","doi":"10.33042/2522-1809-2023-4-178-293-298","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-293-298","url":null,"abstract":"The article is devoted to highlighting the peculiarities of determining the frequencies of natural oscillations of the elements of the mechanical system of modern rolling stock. A significant volume of passenger transportation in suburban traffic on railway networks of Ukraine is carried out by the operating fleet of rolling stock, most of which are operated overtime. Taking into account the relatively slow pace of renewal of Ukrzaliznytsia's rolling stock fleet, scientific research aimed at maintaining a high level of technical and economic indicators of electric trains in operation becomes especially important. Therefore, research aimed at improving performance indicators of structural elements of rolling stock should be considered relevant. As one of the most responsible units of the mechanical system of modern rolling stock, the crew part can be singled out, which includes a traction electric drive, during the operation of which the phenomenon of jolts is observed in some modes of operation. Such a phenomenon is observed in resonant modes of operation, that is, the coincidence of the frequencies of natural and forced oscillations, which negatively affects the reliability and durability of the mechanical system as a whole. Therefore, the task of identifying resonant frequencies and eliminating the manifestation of the negative phenomenon of resonance arises. One of the possible ways to solve the given problem is to adjust the operation of the traction drive mechanism in non-resonant modes, which in turn requires research on the torsional oscillations of the mechanical drive system. The article presents an approach using geometric models of the design elements of the traction drive of electric trains, the corresponding mathematical model, and the results of modeling the shape of the frequency of natural oscillations of the traction drive of an electric train. Based on the results of the calculations, it was determined that the form of natural oscillation frequencies of the considered mechanical system has a two-node character. The proposed approach is based on the use of a tabular form of calculation of recurrent formulas. Based on the results of the research, recommendations are given for the further use of the obtained results. Keywords: motor-wagon rolling stock, electric train, traction drive, self-oscillations.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135452910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-125-129
M. Pilicheva, O. Kondrashchenko, E. Shterndok
In the context of urbanization and global climate change, the need to adapt and respond to land use dynamics is becoming increasingly important. Cities are constantly transforming, and this transformation affects the social, economic and environmental aspects of the lives of their inhabitants. Accordingly, monitoring tools and methods must be flexible, adaptive and capable of working in real time. Thanks to the latest technologies and monitoring methods, it became possible to quickly analyse changes and predict the future of urban development. In this aspect, remote sensing of the Earth should be noted. The advantages of this tool include: large territorial coverage; high frequency of pictures; the possibility of analysis in different spectral ranges, etc. Geoinformation systems are an equally important tool. GIS allows you to combine, analyse and visualize spatial data. 3D modelling can also be noted as an important tool. With the help of modern technologies, such as laser scanning, it has become possible to create detailed three-dimensional models of urban areas. Separately, automated systems for controlling the use of the territory of cities should be singled out. Due to the proliferation of digital technologies, citizens can actively participate in monitoring processes using mobile applications, public observation platforms and other tools for data collection and sharing. In the monitoring processes of urban land use, mathematical modelling plays a key role in predicting urban land use. The models help researchers and authorities understand current trends and make predictions about the future development of urban areas. Several mathematical modelling approaches can be distinguished, which include: city growth models, geostatistical models, agent-based models, regression models, system dynamic models, optimization models, landscape ecology, diffusion models, socio-economic models, scenario analysis models , combined models. Several different modelling methods are often combined to obtain the most complete and accurate picture. Keywords: monitoring, geoinformation system, modeling methods, land use, factors influencing land use.
{"title":"MODERN METHODS OF URBAN ENVIRONMENT LAND USE MONITORING","authors":"M. Pilicheva, O. Kondrashchenko, E. Shterndok","doi":"10.33042/2522-1809-2023-4-178-125-129","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-125-129","url":null,"abstract":"In the context of urbanization and global climate change, the need to adapt and respond to land use dynamics is becoming increasingly important. Cities are constantly transforming, and this transformation affects the social, economic and environmental aspects of the lives of their inhabitants. Accordingly, monitoring tools and methods must be flexible, adaptive and capable of working in real time. Thanks to the latest technologies and monitoring methods, it became possible to quickly analyse changes and predict the future of urban development. In this aspect, remote sensing of the Earth should be noted. The advantages of this tool include: large territorial coverage; high frequency of pictures; the possibility of analysis in different spectral ranges, etc. Geoinformation systems are an equally important tool. GIS allows you to combine, analyse and visualize spatial data. 3D modelling can also be noted as an important tool. With the help of modern technologies, such as laser scanning, it has become possible to create detailed three-dimensional models of urban areas. Separately, automated systems for controlling the use of the territory of cities should be singled out. Due to the proliferation of digital technologies, citizens can actively participate in monitoring processes using mobile applications, public observation platforms and other tools for data collection and sharing. In the monitoring processes of urban land use, mathematical modelling plays a key role in predicting urban land use. The models help researchers and authorities understand current trends and make predictions about the future development of urban areas. Several mathematical modelling approaches can be distinguished, which include: city growth models, geostatistical models, agent-based models, regression models, system dynamic models, optimization models, landscape ecology, diffusion models, socio-economic models, scenario analysis models , combined models. Several different modelling methods are often combined to obtain the most complete and accurate picture. Keywords: monitoring, geoinformation system, modeling methods, land use, factors influencing land use.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-92-101
Y. Solodovnyk, V. Riumin
Nodal joints uniting separate elements of steel structures are the most important parts of the whole structure. For the tensile zone of a connection, the study of its stress-strain state up to the limit of exhaustion of its bearing capacity is of greatest interest. There exist different design approaches to obtain the ultimate capacity of a tension-zone of a steel joint, both numerical and analytical methods. In the presented paper this has been realized using a general-purpose finite element analysis package. The application of numerical methods for modelling the tensile performance of the T-component makes it possible to compensate for the lack of data on full-scale experimental studies. Despite the widespread use of finite element analysis packages, there are still no clear guidelines for creating numerical models of such connections. Numerical analysis has taken into account important effects such as the nonlinear behavior of the material and the contact interaction of its individual elements. Finite element analyses should represent the reality in an accurate way while not being too time consuming to be set up and run. That means appropriate parameters and phenomena, such as element types or loading procedure, should be compiled in a way suitable to the problem at hand, so that the discrepancy between reality and model is sufficiently small. A FE-model with wrong representation of reality can be solved correctly with FEA, but will thereby provide inaccurate results. Therefore, one needs understanding about FE parameters and their influence on time to execute the procedure effectively. When these conditions are met, the possibility to analyze larger number of T-stubs with less user modification opens up. The analytical method for the calculation of the properties of a bolted joint established by the structural Eurocodes proposes the T-stub as a component for the characterization of the tension and compression zones in moment joints. Using the component method, which is the basis for the calculation of joints according to the EN 1993-1-8 design codes, the value of the ultimate tensile force for the T-shaped component of the dimensions adopted in the work was obtained; the obtained values of the ultimate forces were further used in the numerical experiment. Keywords: end-plate connection, numerical model, T-stub component, bolt connection.
{"title":"T-STUB COMPONENT BEHAVIOR OF THE BEAM TO COLUMN BOLTED FLANGE CONNECTION BASED ON A NUMERICAL ANALYSIS AND EN 1993-1-8 DESIGN CODES","authors":"Y. Solodovnyk, V. Riumin","doi":"10.33042/2522-1809-2023-4-178-92-101","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-92-101","url":null,"abstract":"Nodal joints uniting separate elements of steel structures are the most important parts of the whole structure. For the tensile zone of a connection, the study of its stress-strain state up to the limit of exhaustion of its bearing capacity is of greatest interest. There exist different design approaches to obtain the ultimate capacity of a tension-zone of a steel joint, both numerical and analytical methods. In the presented paper this has been realized using a general-purpose finite element analysis package. The application of numerical methods for modelling the tensile performance of the T-component makes it possible to compensate for the lack of data on full-scale experimental studies. Despite the widespread use of finite element analysis packages, there are still no clear guidelines for creating numerical models of such connections. Numerical analysis has taken into account important effects such as the nonlinear behavior of the material and the contact interaction of its individual elements. Finite element analyses should represent the reality in an accurate way while not being too time consuming to be set up and run. That means appropriate parameters and phenomena, such as element types or loading procedure, should be compiled in a way suitable to the problem at hand, so that the discrepancy between reality and model is sufficiently small. A FE-model with wrong representation of reality can be solved correctly with FEA, but will thereby provide inaccurate results. Therefore, one needs understanding about FE parameters and their influence on time to execute the procedure effectively. When these conditions are met, the possibility to analyze larger number of T-stubs with less user modification opens up. The analytical method for the calculation of the properties of a bolted joint established by the structural Eurocodes proposes the T-stub as a component for the characterization of the tension and compression zones in moment joints. Using the component method, which is the basis for the calculation of joints according to the EN 1993-1-8 design codes, the value of the ultimate tensile force for the T-shaped component of the dimensions adopted in the work was obtained; the obtained values of the ultimate forces were further used in the numerical experiment. Keywords: end-plate connection, numerical model, T-stub component, bolt connection.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-199-205
O. Zemlianskyi, T. Yurha, S. Troshkin
The article describes the process of modeling and creating a compact portable foam generator of medium multiplicity with geometric and dimensional parameters that allow for the use of air-mechanical foam directly during reconnaissance without complicating circumstances that arise during reconnaissance with a gas and smoke protection service when it is necessary to supply air-mechanical foam without a foam generator, which is not included in the minimum necessary list of firefighting tools and devices. Generally, the use of foam generators by the gas and smoke protection service during fires is a common practice and constitutes typical actions in case of fire incidents. However, there is one particular aspect in the use of generators - their weight and geometric dimensions, which may restrict the movement of personnel in relatively confined spaces such as cable tunnels, basements, and underground structures. Therefore, greater attention should be paid to the use of foam generators with medium multiplicity. The foam isolates the combustion zone from flammable vapors and gases, as well as the combustible surface of the material from the heat emitted by the reaction zone. It penetrates well into the premises, overcomes turns and climbs, quickly fills the volume of the room, displaces combustion products heated to high temperatures, thereby reducing the temperature in the room. To ensure instant response to the situation during reconnaissance with a gas and smoke protection service, equipment should be provided that allows for confident response to complex tactical tasks for the fire suppression commander, making informed and decisive decisions regarding reducing the likelihood of emergency situations and reducing the percentage of human and material losses. The motto of a rescuer is "prevent, save, help." This article describes a useful model that reduces the decision-making time for the fire suppression commander at the end of reconnaissance, the time of initiating the first fire extinguishing nozzle, the time of fire localization and extinguishment, which increases the likelihood of saving human lives from fire hazards. Keywords: compact medium expansion foam generator, air-mechanical foam, gas and smoke protection service.
{"title":"CREATION OF A PORTABLE FOAM GENERATOR WITH PRACTICAL RESEARCH CONDUCTED","authors":"O. Zemlianskyi, T. Yurha, S. Troshkin","doi":"10.33042/2522-1809-2023-4-178-199-205","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-199-205","url":null,"abstract":"The article describes the process of modeling and creating a compact portable foam generator of medium multiplicity with geometric and dimensional parameters that allow for the use of air-mechanical foam directly during reconnaissance without complicating circumstances that arise during reconnaissance with a gas and smoke protection service when it is necessary to supply air-mechanical foam without a foam generator, which is not included in the minimum necessary list of firefighting tools and devices. Generally, the use of foam generators by the gas and smoke protection service during fires is a common practice and constitutes typical actions in case of fire incidents. However, there is one particular aspect in the use of generators - their weight and geometric dimensions, which may restrict the movement of personnel in relatively confined spaces such as cable tunnels, basements, and underground structures. Therefore, greater attention should be paid to the use of foam generators with medium multiplicity. The foam isolates the combustion zone from flammable vapors and gases, as well as the combustible surface of the material from the heat emitted by the reaction zone. It penetrates well into the premises, overcomes turns and climbs, quickly fills the volume of the room, displaces combustion products heated to high temperatures, thereby reducing the temperature in the room. To ensure instant response to the situation during reconnaissance with a gas and smoke protection service, equipment should be provided that allows for confident response to complex tactical tasks for the fire suppression commander, making informed and decisive decisions regarding reducing the likelihood of emergency situations and reducing the percentage of human and material losses. The motto of a rescuer is \"prevent, save, help.\" This article describes a useful model that reduces the decision-making time for the fire suppression commander at the end of reconnaissance, the time of initiating the first fire extinguishing nozzle, the time of fire localization and extinguishment, which increases the likelihood of saving human lives from fire hazards. Keywords: compact medium expansion foam generator, air-mechanical foam, gas and smoke protection service.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-130-135
M. Pilicheva, K. Meteshkin, O. Kondrashchenko
Cities are being rebuilt, expanded, and modernized, and proper land management becomes critical. Factor analysis can help identify areas in need of social investment, ensuring equal access to resources and opportunities for all citizens. Therefore, the relevance of factor analysis in the study of land use in modern conditions does not require discussion. Factor analysis is a statistical method that allows you to study the relationship between numerous variables and reveal the structural features of the data. The importance of the application of factor analysis in the processes of monitoring the use of land in cities lies in the heavy load on the land resources of cities, which requires informed decisions regarding their use. Factor analysis allows identify key factors affecting land use, understand the community's priorities and needs, evaluate the potential of different areas of the city for the placement of objects. Factor analysis also has its advantages and disadvantages. Disadvantages include: subjectivity (since some factors can be subjectively determined, there is a risk of data distortion or misinterpretation), dynamism (cities are dynamic systems. This means that they are constantly changing, and factors that were relevant today may lose their relevance tomorrow), complexity of interpretation (a large number of factors can complicate the process of interpreting the results). Positive aspects of factor analysis should be noted: continuous updating of data (aimed at collecting and obtaining the most recent data for accurate response and development of appropriate solutions), integrating different data sources (which is a combination of traditional and new data sources such as social networks, can help to get a more complete picture of the situation), the use of a multidisciplinary approach (which allows the involvement of experts from various fields and will provide a deeper understanding of the city's problems and needs). Thus, factor analysis in urban planning remains one of the most effective tools for understanding complex relationships in the city. To get the most complete picture of the situation, factor analysis is often combined with other research methods. One example is geographic information systems (GIS). They allow you to visualize the results of factor analysis on maps, which simplifies the decision-making process at the level of urban planning. Keywords: spatial support, land use factors, methods of factor analysis, geospatial data, planning parameters.
{"title":"FACTOR ANALYSIS AS A METHOD OF URBAN LAND USE RESEARCH","authors":"M. Pilicheva, K. Meteshkin, O. Kondrashchenko","doi":"10.33042/2522-1809-2023-4-178-130-135","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-130-135","url":null,"abstract":"Cities are being rebuilt, expanded, and modernized, and proper land management becomes critical. Factor analysis can help identify areas in need of social investment, ensuring equal access to resources and opportunities for all citizens. Therefore, the relevance of factor analysis in the study of land use in modern conditions does not require discussion. Factor analysis is a statistical method that allows you to study the relationship between numerous variables and reveal the structural features of the data. The importance of the application of factor analysis in the processes of monitoring the use of land in cities lies in the heavy load on the land resources of cities, which requires informed decisions regarding their use. Factor analysis allows identify key factors affecting land use, understand the community's priorities and needs, evaluate the potential of different areas of the city for the placement of objects. Factor analysis also has its advantages and disadvantages. Disadvantages include: subjectivity (since some factors can be subjectively determined, there is a risk of data distortion or misinterpretation), dynamism (cities are dynamic systems. This means that they are constantly changing, and factors that were relevant today may lose their relevance tomorrow), complexity of interpretation (a large number of factors can complicate the process of interpreting the results). Positive aspects of factor analysis should be noted: continuous updating of data (aimed at collecting and obtaining the most recent data for accurate response and development of appropriate solutions), integrating different data sources (which is a combination of traditional and new data sources such as social networks, can help to get a more complete picture of the situation), the use of a multidisciplinary approach (which allows the involvement of experts from various fields and will provide a deeper understanding of the city's problems and needs). Thus, factor analysis in urban planning remains one of the most effective tools for understanding complex relationships in the city. To get the most complete picture of the situation, factor analysis is often combined with other research methods. One example is geographic information systems (GIS). They allow you to visualize the results of factor analysis on maps, which simplifies the decision-making process at the level of urban planning. Keywords: spatial support, land use factors, methods of factor analysis, geospatial data, planning parameters.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-269-279
O. Azarenko, Yu. Honcharenko, M. Divizinyuk, R. Shevchenko, O. Shevchenko
The work systematizes knowledge in the field of threat and risk research when solving applied problems. To achieve the set goal, the following scientific tasks must be solved: analyze the main concepts of threat and risk research; give a description of the tasks to be solved regarding threats and risks; consider the main methods of threat and risk analysis from the standpoint of the technocratic concept; from the standpoint of the technocratic concept, consider the main methods of risk assessment, their advantages and disadvantages. A threat is understood as a potentially possible event that can lead to harm (catastrophic event), and risk - determines the degree of danger of occurrence or impact of a threat (or a set of threats - a set of catastrophic events) on a specific object (resource, process or system). At the same time, for a specific dangerous (for example, a nuclear) object, the concepts of a certain type of threat and the risk of its occurrence are interconnected. This strict triangular dependence requires a unified (inseparable, interrelated) consideration of these concepts in relation to solving various applied problems. A systematic approach to ensuring their safety is applied to all complex man-made objects, which includes the identification of objective dangers, the definition and ranking of threats, the assessment of the risk of their manifestation and the preparation of a forecast, which is done in favor of preventing catastrophic events caused by objective dangers. The most effective methods of threat and risk assessment are methods integrated into monitoring systems, decision support systems, and other automated management systems. The events of recent years in Ukraine require the definition of a terrorist threat as the primary and most important one, because in relation to nuclear facilities, under a positive man-made environment, it creates an avalanche-like emergency situation caused by nuclear, radiation, environmental and other catastrophic events. In turn, this will require the systematization of existing and the development of new methods, algorithms and protocols for assessing and countering terrorist threats at man-made objects. Keywords: emergency situation, catastrophic event, man-made object, danger, threat, risk.
{"title":"THREATS AND RISKS RESEARCH METHODS","authors":"O. Azarenko, Yu. Honcharenko, M. Divizinyuk, R. Shevchenko, O. Shevchenko","doi":"10.33042/2522-1809-2023-4-178-269-279","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-269-279","url":null,"abstract":"The work systematizes knowledge in the field of threat and risk research when solving applied problems. To achieve the set goal, the following scientific tasks must be solved: analyze the main concepts of threat and risk research; give a description of the tasks to be solved regarding threats and risks; consider the main methods of threat and risk analysis from the standpoint of the technocratic concept; from the standpoint of the technocratic concept, consider the main methods of risk assessment, their advantages and disadvantages. A threat is understood as a potentially possible event that can lead to harm (catastrophic event), and risk - determines the degree of danger of occurrence or impact of a threat (or a set of threats - a set of catastrophic events) on a specific object (resource, process or system). At the same time, for a specific dangerous (for example, a nuclear) object, the concepts of a certain type of threat and the risk of its occurrence are interconnected. This strict triangular dependence requires a unified (inseparable, interrelated) consideration of these concepts in relation to solving various applied problems. A systematic approach to ensuring their safety is applied to all complex man-made objects, which includes the identification of objective dangers, the definition and ranking of threats, the assessment of the risk of their manifestation and the preparation of a forecast, which is done in favor of preventing catastrophic events caused by objective dangers. The most effective methods of threat and risk assessment are methods integrated into monitoring systems, decision support systems, and other automated management systems. The events of recent years in Ukraine require the definition of a terrorist threat as the primary and most important one, because in relation to nuclear facilities, under a positive man-made environment, it creates an avalanche-like emergency situation caused by nuclear, radiation, environmental and other catastrophic events. In turn, this will require the systematization of existing and the development of new methods, algorithms and protocols for assessing and countering terrorist threats at man-made objects. Keywords: emergency situation, catastrophic event, man-made object, danger, threat, risk.","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.33042/2522-1809-2023-4-178-118-124
A. Aleynikova, P. Hulievskyi, I. Voronenko
The analysis of the occurrence of typical accidents of water drainage networks indicates a number of reasons for their failure, namely: a 2-3 times decrease in the amount of sewage over the last 20 years; increase in aggressiveness of wastewater, decrease in flow rate and increase in rainfall. During operation beyond the regulatory term, the reinforced concrete vault of the tunnel is almost completely destroyed as a result of biogenic corrosion. The listed reasons for the destruction of sewage tunnels built more than 50 years ago are generally similar in nature. From the above, it follows that the specifics of the operation of sewer tunnels can be highlighted - the cross-section diameter is more than 1500 mm and the laying depth is more than 5-7 m. It should be noted that the sections of the tunnels at the points of connection with inspection shafts, as well as the structure of inspection shafts, experience the greatest corrosion. A significant role in the repair and restoration of water drainage structures is played by the selection of materials and structures capable of counteracting the aggressive effects of hydrogen sulfide and other gases. In Ukraine and abroad, considerable experience has been accumulated in the repair and restoration of drainage network structures using materials and structures with high acid and alkali resistance. Conducted research has shown that products based on basalt have a number of advantages: high strength, fairly low weight, reliability during operation in a wide temperature range, they are not prone to corrosion and have high chemical resistance. The experience of working with pneumatic formwork gives them special importance, because they ensure the following requirements:quick installation and dismantling of the formwork; the possibility of using it for curved spatial surfaces forms, even with large spans;multiple reversibility of the formwork. The technology for the construction of the vaulted part of the sewer tunnel with internal finishing with stone casting tiles involves the following stages:dismantling of emergency sections of the tunnel (vaults, walls);clearing the tray part of the tunnel;restoration of the section of the tunnel part of the tunnel (if the tunnel is destroyed);cleaning of the existing fittings to ensure the joint operation of the tray and the protective coating of the vault being erected;installation of pneumatic formwork for the construction of the tunnel vault with internal finishing with stone casting tiles;laying stone casting tiles;installation of the necessary fittings for the protective lining of the vault made of monolithic reinforced concrete;creation of inventory formwork;laying the concrete mixture of the monolithic part of the vault;dismantling of pneumatic and inventory formwork after gaining strength of concrete;backfilling of the trench with compaction. The main period of restoration of the observation shaft with the help of lining the walls with stone-cast basalt tiles: di
{"title":"ORGANIZATIONAL AND TECHNOLOGICAL SOLUTIONS FOR THE REPAIR AND RESTORATION OF SEWAGE TUNNELS IN THE PLACES ADJACENT TO EXPLORATION MINES","authors":"A. Aleynikova, P. Hulievskyi, I. Voronenko","doi":"10.33042/2522-1809-2023-4-178-118-124","DOIUrl":"https://doi.org/10.33042/2522-1809-2023-4-178-118-124","url":null,"abstract":"The analysis of the occurrence of typical accidents of water drainage networks indicates a number of reasons for their failure, namely: a 2-3 times decrease in the amount of sewage over the last 20 years; increase in aggressiveness of wastewater, decrease in flow rate and increase in rainfall. During operation beyond the regulatory term, the reinforced concrete vault of the tunnel is almost completely destroyed as a result of biogenic corrosion. The listed reasons for the destruction of sewage tunnels built more than 50 years ago are generally similar in nature. From the above, it follows that the specifics of the operation of sewer tunnels can be highlighted - the cross-section diameter is more than 1500 mm and the laying depth is more than 5-7 m. It should be noted that the sections of the tunnels at the points of connection with inspection shafts, as well as the structure of inspection shafts, experience the greatest corrosion. A significant role in the repair and restoration of water drainage structures is played by the selection of materials and structures capable of counteracting the aggressive effects of hydrogen sulfide and other gases. In Ukraine and abroad, considerable experience has been accumulated in the repair and restoration of drainage network structures using materials and structures with high acid and alkali resistance. Conducted research has shown that products based on basalt have a number of advantages: high strength, fairly low weight, reliability during operation in a wide temperature range, they are not prone to corrosion and have high chemical resistance. The experience of working with pneumatic formwork gives them special importance, because they ensure the following requirements:quick installation and dismantling of the formwork; the possibility of using it for curved spatial surfaces forms, even with large spans;multiple reversibility of the formwork. The technology for the construction of the vaulted part of the sewer tunnel with internal finishing with stone casting tiles involves the following stages:dismantling of emergency sections of the tunnel (vaults, walls);clearing the tray part of the tunnel;restoration of the section of the tunnel part of the tunnel (if the tunnel is destroyed);cleaning of the existing fittings to ensure the joint operation of the tray and the protective coating of the vault being erected;installation of pneumatic formwork for the construction of the tunnel vault with internal finishing with stone casting tiles;laying stone casting tiles;installation of the necessary fittings for the protective lining of the vault made of monolithic reinforced concrete;creation of inventory formwork;laying the concrete mixture of the monolithic part of the vault;dismantling of pneumatic and inventory formwork after gaining strength of concrete;backfilling of the trench with compaction. The main period of restoration of the observation shaft with the help of lining the walls with stone-cast basalt tiles: di","PeriodicalId":56194,"journal":{"name":"Komunal''ne Gospodarstvo Mist","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135453227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：