Pub Date : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.7.913
Підвищених Температур, М БЕРЕЗЮКА., канд. техн, наук, проф, І ГАННИКМ., Berezyuk А.М
Problem statement. High stability composite materials, such as polymer concrete, play a significant role in modern practice. Due to a continuing demand for the use of building materials resistant to aggressive environments both in Ukraine and globally, as well as their prospective use in construction, metallurgy, and chemical industry, the investigation deals with deformations of polymer concrete in various types of environment at high temperature. The purpose of the research is to find mechanisms to increase the stability of polymer concrete in aggressive environment. The object of the study is polymer concrete based on modified furan resins. The subject of the study is deformation characteristics (namely creep) of polymer concrete in different environments (water, sulfuric acid) at different temperatures. Results. In the course of research of the deformation parameters of polymer concrete in various environments were identified. Conclusions. The deformation parameters of polymer concrete on modified furan resins in hot sulfuric acid solutions were determined. It has been proved that the decrease in strength and deformation properties also depends on the hygroscopicity of benzosulfonic acid. It is shown that under simultaneous influence of aggressive environment and temperature in a stressed state the phenomenon of creep is more intensive and the polymer concrete is destroyed in a short time.
{"title":"STUDY ON POLYMER CONCRETE DEFORMATIONS IN DIFFERENT ENVIRONMENTS AT HIGH TEMPERATURE","authors":"Підвищених Температур, М БЕРЕЗЮКА., канд. техн, наук, проф, І ГАННИКМ., Berezyuk А.М","doi":"10.30838/j.bpsacea.2312.280223.7.913","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.7.913","url":null,"abstract":"Problem statement. High stability composite materials, such as polymer concrete, play a significant role in modern practice. Due to a continuing demand for the use of building materials resistant to aggressive environments both in Ukraine and globally, as well as their prospective use in construction, metallurgy, and chemical industry, the investigation deals with deformations of polymer concrete in various types of environment at high temperature. The purpose of the research is to find mechanisms to increase the stability of polymer concrete in aggressive environment. The object of the study is polymer concrete based on modified furan resins. The subject of the study is deformation characteristics (namely creep) of polymer concrete in different environments (water, sulfuric acid) at different temperatures. Results. In the course of research of the deformation parameters of polymer concrete in various environments were identified. Conclusions. The deformation parameters of polymer concrete on modified furan resins in hot sulfuric acid solutions were determined. It has been proved that the decrease in strength and deformation properties also depends on the hygroscopicity of benzosulfonic acid. It is shown that under simultaneous influence of aggressive environment and temperature in a stressed state the phenomenon of creep is more intensive and the polymer concrete is destroyed in a short time.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130952658","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.52.918
B. Makovetskyi, О. Diachenko, М. Troshyn
Problem statement. Hydrotechnical structures undergo a process of inspection for their technical condition. This is necessary to maintain the durability of the structure. In the process of operation, structural defects occur, which are difficult to examine and investigate, due to the impossibility of access for visual inspection. Such defects include those formed in the body of gravity-type earth dams. This applies, first of all, to structures and devices that are located in the body of dams during their construction. They include, in particular, spillways and pipelines. Defects in these structures lead to leakage of water into the body of the dam, which eventually collapses from the inside. Timely detection of defects prevents the destruction of dams due to urgent repairs, and this extends the durability of the structure. The purpose of the article is to develop an analytical-instrumental method of finding, without destroying the body of the dam, erosional, loosened areas in leakage zones, and determining their volumes. Method. A modern method of geophysics, which is electrotomography, is used. As a theoretical justification, the method of the Earth's natural pulsed electromagnetic field (MENPEF) was taken as a basis. The result of the research is the development of a methodology using the methods of engineering geophysics: the method of the Earth's natural pulsed electromagnetic field (MENPEF) and geoelectric tomography. Scientific novelty lies in the fact that the method was developed for the first time for the examination of earth dambs spillways. Practical value. With the help of the developed method, in the future it will be possible to conduct surveys for earth dams of hydrotechnical structures for all organizations that are engaged in such work and have the necessary tools. Conclusions. An analytical-instrumental method of researching the sections of earth dams that cross the structures of ponds spillways and reservoirs has been developed. The location of the loosened soil halo around the spillway pipes inside the body of the earth dam was identified, and the volume of such soil was determined.
{"title":"INVESTIGATION OF THE TECHNICAL CONDITION OF WATER DISCHARGE DEVICES OF HYDRAULIC STRUCTURES","authors":"B. Makovetskyi, О. Diachenko, М. Troshyn","doi":"10.30838/j.bpsacea.2312.280223.52.918","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.52.918","url":null,"abstract":"Problem statement. Hydrotechnical structures undergo a process of inspection for their technical condition. This is necessary to maintain the durability of the structure. In the process of operation, structural defects occur, which are difficult to examine and investigate, due to the impossibility of access for visual inspection. Such defects include those formed in the body of gravity-type earth dams. This applies, first of all, to structures and devices that are located in the body of dams during their construction. They include, in particular, spillways and pipelines. Defects in these structures lead to leakage of water into the body of the dam, which eventually collapses from the inside. Timely detection of defects prevents the destruction of dams due to urgent repairs, and this extends the durability of the structure. The purpose of the article is to develop an analytical-instrumental method of finding, without destroying the body of the dam, erosional, loosened areas in leakage zones, and determining their volumes. Method. A modern method of geophysics, which is electrotomography, is used. As a theoretical justification, the method of the Earth's natural pulsed electromagnetic field (MENPEF) was taken as a basis. The result of the research is the development of a methodology using the methods of engineering geophysics: the method of the Earth's natural pulsed electromagnetic field (MENPEF) and geoelectric tomography. Scientific novelty lies in the fact that the method was developed for the first time for the examination of earth dambs spillways. Practical value. With the help of the developed method, in the future it will be possible to conduct surveys for earth dams of hydrotechnical structures for all organizations that are engaged in such work and have the necessary tools. Conclusions. An analytical-instrumental method of researching the sections of earth dams that cross the structures of ponds spillways and reservoirs has been developed. The location of the loosened soil halo around the spillway pipes inside the body of the earth dam was identified, and the volume of such soil was determined.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133156987","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.59.919
А. Makhinko, N. Makhinko
Problem statement. Today, the food security of the world is one of the main issues for the political, economic and scientific community, and the recent crisis with the export of Ukrainian grain only intensifies the urgency of the problem. The important part of this issue is creation of reliable and safe grain storage silos. An analysis of recent accidents in silos, especially with conical hoppers, revealed a range of imperfections in outdated regulatory practices that Ukraine inherited from the Soviet building norm system. A limited list of agricultural crops, ignoring the statistical spread of their physical and mechanical characteristics, not differentiating between the stress-strain state for filling and discharge silos, the absolute absence of guidelines and recommendations for the design of principal connections - this is a far from complete list of shortcomings and omissions of outdated Soviet standards. With the entry into force of the new Ukrainian norm DBN V.2.6-221:2021 “Designs of steel silos with a corrugated wall for grain”, the situation should have changed. Firstly, the new standards take into account the world experience in design, construction and fabrication of silos, and secondly, they have a direct and legitimate reference to the necessary standards of the Eurocode system, in which a modern engineer can find answers to a wide range of practical questions. Unfortunately, the introduction of this, without exaggeration, modern and extremely important standard into construction practice is constantly ignored. On the one hand, this is due to the unwillingness of Ukrainian manufacturers to switch to new European and more rigid requirements for reliability and safety, on the other hand, the fear of Ukrainian engineers in front of the complex and extensive Eurocode standardization system. The purpose of the article (ignoring the financial commercialism of individual silo manufacturers) is explain to domestic designers a few provisions of the new DBN V.2.6-221:2021 related to the design of silos with a conical hopper. In particular, the design of one of the very important units at the point of transition of the cylindrical part of the silo to the conical hopper. Methodology. For this, the general ideology and methodology of the limit state method, implemented in the Eurocode standards through the system of partial reliability factors, as well as classical methods of structural mechanics, which are still not reflected in the system of building regulation of modern Ukraine, are used. Results. As a result, clear recommendations for the design of the transition junction of silos with a conical hopper in accordance with Eurocode and DBN V.2.6-221:2021, as well as clarification of “special” points that are not properly covered in both regulations. Conclusion. The recommendations and explanations given in the article, firstly, accelerate the introduction of the new DBN V.2.6-221:2021 into engineering practice, which is harmonized with the Eur
{"title":"DESIGN OF TRANSITION JUNCTIONS OF SILOS’ CONICAL HOPPERS ACCORDING TO EUROPEAN STANDARD EUROCODE","authors":"А. Makhinko, N. Makhinko","doi":"10.30838/j.bpsacea.2312.280223.59.919","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.59.919","url":null,"abstract":"Problem statement. Today, the food security of the world is one of the main issues for the political, economic and scientific community, and the recent crisis with the export of Ukrainian grain only intensifies the urgency of the problem. The important part of this issue is creation of reliable and safe grain storage silos. An analysis of recent accidents in silos, especially with conical hoppers, revealed a range of imperfections in outdated regulatory practices that Ukraine inherited from the Soviet building norm system. A limited list of agricultural crops, ignoring the statistical spread of their physical and mechanical characteristics, not differentiating between the stress-strain state for filling and discharge silos, the absolute absence of guidelines and recommendations for the design of principal connections - this is a far from complete list of shortcomings and omissions of outdated Soviet standards. With the entry into force of the new Ukrainian norm DBN V.2.6-221:2021 “Designs of steel silos with a corrugated wall for grain”, the situation should have changed. Firstly, the new standards take into account the world experience in design, construction and fabrication of silos, and secondly, they have a direct and legitimate reference to the necessary standards of the Eurocode system, in which a modern engineer can find answers to a wide range of practical questions. Unfortunately, the introduction of this, without exaggeration, modern and extremely important standard into construction practice is constantly ignored. On the one hand, this is due to the unwillingness of Ukrainian manufacturers to switch to new European and more rigid requirements for reliability and safety, on the other hand, the fear of Ukrainian engineers in front of the complex and extensive Eurocode standardization system. The purpose of the article (ignoring the financial commercialism of individual silo manufacturers) is explain to domestic designers a few provisions of the new DBN V.2.6-221:2021 related to the design of silos with a conical hopper. In particular, the design of one of the very important units at the point of transition of the cylindrical part of the silo to the conical hopper. Methodology. For this, the general ideology and methodology of the limit state method, implemented in the Eurocode standards through the system of partial reliability factors, as well as classical methods of structural mechanics, which are still not reflected in the system of building regulation of modern Ukraine, are used. Results. As a result, clear recommendations for the design of the transition junction of silos with a conical hopper in accordance with Eurocode and DBN V.2.6-221:2021, as well as clarification of “special” points that are not properly covered in both regulations. Conclusion. The recommendations and explanations given in the article, firstly, accelerate the introduction of the new DBN V.2.6-221:2021 into engineering practice, which is harmonized with the Eur","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114233821","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.28.916
V. Vorobiov, О. Shylo
Problem statement. The ХХth century was the time of developing unique architectural and urban planning projects for the Earth the exploration of other planets. This work continues even now, due to the development of knowledge in the engineering and technology, materials science, construction and related technologies, and many other areas. Including space vectors of economic, political, scientific, military, medical, evolutionary and other interests of people. The development of new objects is traditionally dominated by outdated scientific ideas about the essence and properties of space, the essence and properties of man and people's reflexions on themselves and their environment. On the other hand, in scientific communities, during the same ХХth − early ХХIst centuries, three theoretical directions of knowledge were formed that radically change the idea of the space and time existence, in which the architect is thought to create his objects; the existence of matter (the substance from which cities and buildings in them are built); what is the discrete and probabilistic structure of Being, and how we should now relate to it. Three directions of knowledge that have revolutionised the understanding the foundations of the Universe from the microscale to Universal processes are the general theory of relativity, quantum mechanics and the theory of loop gravity. A critical analysis of contemporary architecture and urban planning has led to the conclusion that, based on new knowledge, approaches to the formation of the anthropogenic environment, created both for conditions on Earth and for other planets have to be reconsidered also. The purpose of the article − to reveal a new understanding for foundations of the architectural and urban environment formation during objects’ creation on Earth and other planets.
{"title":"NEW UNDERSTANDING OF THE ARCHITECTURAL AND URBAN PLANNING ENVIRONMENT FORMATION DURING OBJECTS’ CREATION ON EARTH AND OTHER PLANETS","authors":"V. Vorobiov, О. Shylo","doi":"10.30838/j.bpsacea.2312.280223.28.916","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.28.916","url":null,"abstract":"Problem statement. The ХХth century was the time of developing unique architectural and urban planning projects for the Earth the exploration of other planets. This work continues even now, due to the development of knowledge in the engineering and technology, materials science, construction and related technologies, and many other areas. Including space vectors of economic, political, scientific, military, medical, evolutionary and other interests of people. The development of new objects is traditionally dominated by outdated scientific ideas about the essence and properties of space, the essence and properties of man and people's reflexions on themselves and their environment. On the other hand, in scientific communities, during the same ХХth − early ХХIst centuries, three theoretical directions of knowledge were formed that radically change the idea of the space and time existence, in which the architect is thought to create his objects; the existence of matter (the substance from which cities and buildings in them are built); what is the discrete and probabilistic structure of Being, and how we should now relate to it. Three directions of knowledge that have revolutionised the understanding the foundations of the Universe from the microscale to Universal processes are the general theory of relativity, quantum mechanics and the theory of loop gravity. A critical analysis of contemporary architecture and urban planning has led to the conclusion that, based on new knowledge, approaches to the formation of the anthropogenic environment, created both for conditions on Earth and for other planets have to be reconsidered also. The purpose of the article − to reveal a new understanding for foundations of the architectural and urban environment formation during objects’ creation on Earth and other planets.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129480547","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.22.915
О. Vasilyeva, Ya. Kozak
The purpose of the article. The article deals with thermal processes in the heat-resistant sensitive element of fire detectors when an electric current flows through it. Such processes are described by an inhomogeneous equation of mathematical physics with boundary conditions of the third kind. Methodology. The Hankel integral transformation is used to solve the differential equation that describes the thermal processes in the heat-resistant sensitive element of fire detectors. As a result of the transformations, a general expression was obtained for the temperature of the heat-resistant sensitive element of fire detectors under the condition that an electric current flows through it without restrictions on its parameters. This expression is represented as a series of Bessel functions. Results. The results of scientific research confirmed that due to the small size of the fire detectors’ sensitive element, the expression for its temperature is presented in the form of an average value over the sensitive element volume. Scientific novelty. For the first time, a general expression for the temperature of the heat-resistant sensitive element of fire detectors is obtained, which allows obtaining its main technical characteristics, and also serves as a basis for moving to other mathematical descriptions. Practical value. Also, using the integral Laplace transformation, an expression for the transfer function of the fire detectors’ heat-resistant sensitive element was obtained and it was confirmed that with an error of no more than 4,6 %, it is described by the transfer function of the inertial link.
{"title":"THERMAL PROCESSES OF FIRE DETECTORS’ HEAT-RESISTANT SENSITIVE ELEMENTS","authors":"О. Vasilyeva, Ya. Kozak","doi":"10.30838/j.bpsacea.2312.280223.22.915","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.22.915","url":null,"abstract":"The purpose of the article. The article deals with thermal processes in the heat-resistant sensitive element of fire detectors when an electric current flows through it. Such processes are described by an inhomogeneous equation of mathematical physics with boundary conditions of the third kind. Methodology. The Hankel integral transformation is used to solve the differential equation that describes the thermal processes in the heat-resistant sensitive element of fire detectors. As a result of the transformations, a general expression was obtained for the temperature of the heat-resistant sensitive element of fire detectors under the condition that an electric current flows through it without restrictions on its parameters. This expression is represented as a series of Bessel functions. Results. The results of scientific research confirmed that due to the small size of the fire detectors’ sensitive element, the expression for its temperature is presented in the form of an average value over the sensitive element volume. Scientific novelty. For the first time, a general expression for the temperature of the heat-resistant sensitive element of fire detectors is obtained, which allows obtaining its main technical characteristics, and also serves as a basis for moving to other mathematical descriptions. Practical value. Also, using the integral Laplace transformation, an expression for the transfer function of the fire detectors’ heat-resistant sensitive element was obtained and it was confirmed that with an error of no more than 4,6 %, it is described by the transfer function of the inertial link.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128962091","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.102.924
М. Uspenskyi, V. Nesterenko
Problem statement. As a starting point, the article takes the need for constant revision of basic architectural categories and notions, caused by events associated with the emergence in the 1990s − digital non-linear architecture. As the culmination of the postmodern period, digital architecture continues to enrich its paradigm with a focus on complexity of architectural forms. However, based on the current complexity sciences achievements, digital architecture takes complexity with understanding not encountered previously in architectural design theory. The equivocality of notion definition of «complexity» is accepted as a research problem. The purpose of the article. The purpose of the research is to define notion of «complexity» in the context of contemporary architectural form-generation. Methods. The method of semantic analysis was chosen as the main one. Conclusion. The relationship between the notions of form and complexity is revealed, based on a historical analysis of the notion definitions of «form». The term definition of «architectural form» is given through the connection of form and content, that reviles the key aspects of contemporary architectural form content. Changes in the content of notion definitions of «complexity» are analyzed from the design methodology standpoint and general scientific methods. The meaning of complexity is revealed at three levels of form perception: morphological, symbolic and phenomenological levels. The conditionality of necessity and emergence causes of complexity in contemporary architectural forms as a result of changes in the society value orientations is considered. Examples of the gradual implementation of principles and the influence of complexity science upon the architecture theory are given. Taking into account the considered features of complexity understanding and ideas about complex objects taken from complexity theories, a notion definition that does not cause difficulties in application of «complexity» is formulated. Conclusions with nuances of application and characteristics of the obtained definition are given. The possibilities for the further implementation of relevant systemic ideas about city and urban environment that capable to introduce architecture to a new scientific world picture are determined.
{"title":"CONDITIONALITY OF NOTION “COMPLEXITY” IN TERMINOLOGY OF CONTEMPORARY ARCHITECTURAL FORM-GENERATION","authors":"М. Uspenskyi, V. Nesterenko","doi":"10.30838/j.bpsacea.2312.280223.102.924","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.102.924","url":null,"abstract":"Problem statement. As a starting point, the article takes the need for constant revision of basic architectural categories and notions, caused by events associated with the emergence in the 1990s − digital non-linear architecture. As the culmination of the postmodern period, digital architecture continues to enrich its paradigm with a focus on complexity of architectural forms. However, based on the current complexity sciences achievements, digital architecture takes complexity with understanding not encountered previously in architectural design theory. The equivocality of notion definition of «complexity» is accepted as a research problem. The purpose of the article. The purpose of the research is to define notion of «complexity» in the context of contemporary architectural form-generation. Methods. The method of semantic analysis was chosen as the main one. Conclusion. The relationship between the notions of form and complexity is revealed, based on a historical analysis of the notion definitions of «form». The term definition of «architectural form» is given through the connection of form and content, that reviles the key aspects of contemporary architectural form content. Changes in the content of notion definitions of «complexity» are analyzed from the design methodology standpoint and general scientific methods. The meaning of complexity is revealed at three levels of form perception: morphological, symbolic and phenomenological levels. The conditionality of necessity and emergence causes of complexity in contemporary architectural forms as a result of changes in the society value orientations is considered. Examples of the gradual implementation of principles and the influence of complexity science upon the architecture theory are given. Taking into account the considered features of complexity understanding and ideas about complex objects taken from complexity theories, a notion definition that does not cause difficulties in application of «complexity» is formulated. Conclusions with nuances of application and characteristics of the obtained definition are given. The possibilities for the further implementation of relevant systemic ideas about city and urban environment that capable to introduce architecture to a new scientific world picture are determined.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127345363","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.74.921
Yelizaveta V. Protasova, D. Nechepurenko, А. Sokolenko
Problem statement. Ukraine's reform of its housing and communal services gave impetus to the creation of co-owners' associations of multi-apartment buildings. Every year the number of such associations increases, which indicates the interest of co-owners in managing the property on their own, engage in its repair and maintenance. Co-owners, having formed such an association, can not only effectively manage and maintain their own housing, but also receive co-financing for thermal modernization and energy efficiency measures. The property management of co-owners in Ukraine is not only the responsibility of associations of co-owners, but also of residents' initiative groups, professional managers and municipal companies. The reform of the housing and communal services system, which has been ongoing since 2016, needs strong practical support, which can be based on many years of experience in housing management in other countries. The purpose of the article. Conduct a comparative analysis of management forms for co-owned property in Ukraine and beyond, finding common and distinctive features in different EU countries and the world for further use of positive experience in housing management. Conclusions. Improving the acquired experience and applying it in practice will help domestic managers and co-owners' associations of multi-apartment buildings to improve their skills in managing multi-apartment buildings and establish competitive conditions in the housing management market. Based on international experience, it was determined that condominiums in Ukraine need support from local self-government bodies in order to improve the management of the housing and communal sector of the economy. In addition, the effective development of Ukrainian condominiums is facilitated by co-financing for the maintenance and repair of the existing housing stock in a condition according to existing norms, which significantly raises the standards of residents’ comfort in their homes.
{"title":"COMPARATIVE ANALYSIS OF MANAGEMENT FORMS FOR THE APARTMENT BUILDINGS IN UKRAINE AND OTHER COUNTRIES","authors":"Yelizaveta V. Protasova, D. Nechepurenko, А. Sokolenko","doi":"10.30838/j.bpsacea.2312.280223.74.921","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.74.921","url":null,"abstract":"Problem statement. Ukraine's reform of its housing and communal services gave impetus to the creation of co-owners' associations of multi-apartment buildings. Every year the number of such associations increases, which indicates the interest of co-owners in managing the property on their own, engage in its repair and maintenance. Co-owners, having formed such an association, can not only effectively manage and maintain their own housing, but also receive co-financing for thermal modernization and energy efficiency measures. The property management of co-owners in Ukraine is not only the responsibility of associations of co-owners, but also of residents' initiative groups, professional managers and municipal companies. The reform of the housing and communal services system, which has been ongoing since 2016, needs strong practical support, which can be based on many years of experience in housing management in other countries. The purpose of the article. Conduct a comparative analysis of management forms for co-owned property in Ukraine and beyond, finding common and distinctive features in different EU countries and the world for further use of positive experience in housing management. Conclusions. Improving the acquired experience and applying it in practice will help domestic managers and co-owners' associations of multi-apartment buildings to improve their skills in managing multi-apartment buildings and establish competitive conditions in the housing management market. Based on international experience, it was determined that condominiums in Ukraine need support from local self-government bodies in order to improve the management of the housing and communal sector of the economy. In addition, the effective development of Ukrainian condominiums is facilitated by co-financing for the maintenance and repair of the existing housing stock in a condition according to existing norms, which significantly raises the standards of residents’ comfort in their homes.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134494164","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.92.923
V. Sedin, V. Ulyanov, V. Kovba, S. Horlach, V. Zahilskyi
Problem statement. The assumption that the properties of sandy soils, in addition to other factors, can also be influenced by the morphological features of the sands of eolian and alluvial genesis, appeared during the analysis of data from high-precision geodetic observations of subsidence and tilting of buildings and structures in the area Energodar. Data from engineering studies also deserve attention. To the greatest extent, the change in the properties of sandy soils is important for the artificial surface structures of the industrial zone and the city itself, namely: retaining walls, so-called light yards of power units and Zaporizhzhya SDPS, transmission line supports, etc. This article is devoted to the solution of the issues that arose earlier, regarding the possible causes of uncontrolled and until now subsidence of individual buildings and structures of the industrial zone, as well as city buildings. The purpose of the article. Obtaining during the research some missing data on the morphology of eolian and alluvial sands within the city of Energodar, in particular, reliable quantitative indicators that can be used in the calculations of soil bases. Conclusions. The results of the soil morphology indicator determination, as well as the study of the shape and nature of the sand grains surface for alluvium of the Vitachevo-Buzka horizon of the 1st floodplain terrace of the Dnipro River valley within the city of Energodar are presented. The results of similar works on the study of genetic types of Quaternary sands of different genesis in the Dnipro River valley were also analyzed. Thanks to the research, data were obtained on the morphology of monomineral oligomictic alluvial sands, their shape and the nature of the sand grains surface of alluvium. Since quartz was the predominant mineral in most of the studied sands, in further studies it is planned to study other mineral differences, which would allow obtaining data on the formation of contacts between sand grains, the shape of which is different from a sphere, lamellar or other shape. For the first time, some basic morphological characteristics of the eolian and alluvial Quaternary sands of the Dnipro valley in Energodar were obtained. Attention is paid to the clarification of the concept of eolian deposits, the determination of their formation age is problematic. The trend of decreasing morphology of river sands of the Dnipro valley from its sources to its mouth is determined. With all confidence, the results of the research can be applied to the foundations of buildings in Energodar.
{"title":"MORPHOLOGICAL FEATURES OF EOLIAN AND ALLUVIAL SANDS OF ENERGODAR CITY","authors":"V. Sedin, V. Ulyanov, V. Kovba, S. Horlach, V. Zahilskyi","doi":"10.30838/j.bpsacea.2312.280223.92.923","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.92.923","url":null,"abstract":"Problem statement. The assumption that the properties of sandy soils, in addition to other factors, can also be influenced by the morphological features of the sands of eolian and alluvial genesis, appeared during the analysis of data from high-precision geodetic observations of subsidence and tilting of buildings and structures in the area Energodar. Data from engineering studies also deserve attention. To the greatest extent, the change in the properties of sandy soils is important for the artificial surface structures of the industrial zone and the city itself, namely: retaining walls, so-called light yards of power units and Zaporizhzhya SDPS, transmission line supports, etc. This article is devoted to the solution of the issues that arose earlier, regarding the possible causes of uncontrolled and until now subsidence of individual buildings and structures of the industrial zone, as well as city buildings. The purpose of the article. Obtaining during the research some missing data on the morphology of eolian and alluvial sands within the city of Energodar, in particular, reliable quantitative indicators that can be used in the calculations of soil bases. Conclusions. The results of the soil morphology indicator determination, as well as the study of the shape and nature of the sand grains surface for alluvium of the Vitachevo-Buzka horizon of the 1st floodplain terrace of the Dnipro River valley within the city of Energodar are presented. The results of similar works on the study of genetic types of Quaternary sands of different genesis in the Dnipro River valley were also analyzed. Thanks to the research, data were obtained on the morphology of monomineral oligomictic alluvial sands, their shape and the nature of the sand grains surface of alluvium. Since quartz was the predominant mineral in most of the studied sands, in further studies it is planned to study other mineral differences, which would allow obtaining data on the formation of contacts between sand grains, the shape of which is different from a sphere, lamellar or other shape. For the first time, some basic morphological characteristics of the eolian and alluvial Quaternary sands of the Dnipro valley in Energodar were obtained. Attention is paid to the clarification of the concept of eolian deposits, the determination of their formation age is problematic. The trend of decreasing morphology of river sands of the Dnipro valley from its sources to its mouth is determined. With all confidence, the results of the research can be applied to the foundations of buildings in Energodar.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123913837","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.15.914
M. Biliaiev, О. Berlov, V. Biliaieva, V. Kozachyna, P. Mashykhina
Problem statement. The task of assessing the level of atmospheric air radioactive contamination in the case of an extreme situation on the territory of the Zaporizhzhya NPP, which leads to an instantaneous radioactive aerosol emission, is considered. An analysis of the dynamics for the zones’ formation of radioactive contamination in the wind direction towards Nikopol is conducted. For the prompt solution of this of this forecast issue, the creation of a multifactorial numerical model is required, which allows for prompt analysis of the size and intensity of radioactive contamination areas. The purpose of the article. Creation of a numerical model and computer code for the operational analysis of radioactive contamination areas formed during the instantaneous release of radioactive pollutants into the atmosphere. Methodology. The computer code is based on a numerical model, which is a differential analogue of the multifactor kinematic equation of mass transfer of a radioactive impurity in atmospheric air. The mass transfer equation takes into account the wind speed field, atmospheric turbulent diffusion, and the intensity of radioactive substances emission into the air. For the numerical integration of the mass transfer equation, the splitting method is used followed by the use of finite-difference schemes. Determination of the volumetric activity value at each splitting step is implemented by an explicit formula. Scientific novelty. An effective numerical model was developed and its software implementation was conducted for operational analysis of the formation of radioactive contamination areas in the atmosphere during an extreme situation at a nuclear power plant, accompanied by the emission of radioactive substances. The model takes into account a complex of factors that affect the process of radioactive impurities spread in the atmosphere. Practical value. A computer code was developed for calculating the dynamics of the formation of radioactive contamination zones in the atmosphere based on the developed numerical model. This makes it possible to analyze the consequences of emergency emissions on the territory of the NPP using the computational experiment method. Conclusions. A mathematical model was developed for the operational analysis of radioactive contamination level of the atmospheric air due to an extreme situation at the nuclear power plant, which leads to an intense instantaneous release of radioactive substances. The results of a computational experiment based on the developed numerical model are presented.
{"title":"FORECASTING OF RADIOACTIVE CONTAMINATION OF ATMOSPHERIC AIR IN AN EXTREME SITUATION AT NPP","authors":"M. Biliaiev, О. Berlov, V. Biliaieva, V. Kozachyna, P. Mashykhina","doi":"10.30838/j.bpsacea.2312.280223.15.914","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.15.914","url":null,"abstract":"Problem statement. The task of assessing the level of atmospheric air radioactive contamination in the case of an extreme situation on the territory of the Zaporizhzhya NPP, which leads to an instantaneous radioactive aerosol emission, is considered. An analysis of the dynamics for the zones’ formation of radioactive contamination in the wind direction towards Nikopol is conducted. For the prompt solution of this of this forecast issue, the creation of a multifactorial numerical model is required, which allows for prompt analysis of the size and intensity of radioactive contamination areas. The purpose of the article. Creation of a numerical model and computer code for the operational analysis of radioactive contamination areas formed during the instantaneous release of radioactive pollutants into the atmosphere. Methodology. The computer code is based on a numerical model, which is a differential analogue of the multifactor kinematic equation of mass transfer of a radioactive impurity in atmospheric air. The mass transfer equation takes into account the wind speed field, atmospheric turbulent diffusion, and the intensity of radioactive substances emission into the air. For the numerical integration of the mass transfer equation, the splitting method is used followed by the use of finite-difference schemes. Determination of the volumetric activity value at each splitting step is implemented by an explicit formula. Scientific novelty. An effective numerical model was developed and its software implementation was conducted for operational analysis of the formation of radioactive contamination areas in the atmosphere during an extreme situation at a nuclear power plant, accompanied by the emission of radioactive substances. The model takes into account a complex of factors that affect the process of radioactive impurities spread in the atmosphere. Practical value. A computer code was developed for calculating the dynamics of the formation of radioactive contamination zones in the atmosphere based on the developed numerical model. This makes it possible to analyze the consequences of emergency emissions on the territory of the NPP using the computational experiment method. Conclusions. A mathematical model was developed for the operational analysis of radioactive contamination level of the atmospheric air due to an extreme situation at the nuclear power plant, which leads to an intense instantaneous release of radioactive substances. The results of a computational experiment based on the developed numerical model are presented.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129427673","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 : 2023-04-14DOI: 10.30838/j.bpsacea.2312.280223.66.920
O. Nazarenko, N. Beiner, P. Beiner
Problem statement. The design of energy efficient buildings requires compliance with a number of criteria. The use of energy efficient constructions and building materials, the use of energy efficient engineering solutions and high performance equipment can more than halve a building's resource consumption. But it is important to select and define the characteristics individually. A real estate object must therefore, first of all, be designed correctly. Calculated designs, reasonably selected building materials and correct calculations from thermal engineering calculators do not guarantee obtaining a heat-insulating and vapor-insulating envelope without gaps. Due to the complexity of the construction object, it is problematic to identify thermal bridges and take into account weak points without an integrated approach to the design of the future building. The climate, geographical location and terrain must also be taken into account. In order to carefully select the optimal design solution, it is necessary to take a large array of data related to energy efficiency indicators. In classic design systems, such information is not displayed or analyzed. It is very difficult to assess the energy efficiency of the project. The technology of building information modeling, or BIM, makes it possible to radically simplify the task of designing energy efficient buildings. The purpose of the article is to substantiate the use of modern programs based on VIM technologies at the stage of energy efficient building design, to determine the criteria for selecting a software complex that will allow you to perform building simulation, calculate energy efficiency indicators, analyze thermal bridges, visualize the results, and issue a package of working documentation within the framework of one program. Demonstrate a highly detailed three-dimensional model of the building enriched with maximum information: data on the thermal conductivity of building materials and technical characteristics of equipment.
{"title":"INTEGRATED APPROACH TO ENERGY EFFICIENT BUILDING DESIGNING BASED ON BIM","authors":"O. Nazarenko, N. Beiner, P. Beiner","doi":"10.30838/j.bpsacea.2312.280223.66.920","DOIUrl":"https://doi.org/10.30838/j.bpsacea.2312.280223.66.920","url":null,"abstract":"Problem statement. The design of energy efficient buildings requires compliance with a number of criteria. The use of energy efficient constructions and building materials, the use of energy efficient engineering solutions and high performance equipment can more than halve a building's resource consumption. But it is important to select and define the characteristics individually. A real estate object must therefore, first of all, be designed correctly. Calculated designs, reasonably selected building materials and correct calculations from thermal engineering calculators do not guarantee obtaining a heat-insulating and vapor-insulating envelope without gaps. Due to the complexity of the construction object, it is problematic to identify thermal bridges and take into account weak points without an integrated approach to the design of the future building. The climate, geographical location and terrain must also be taken into account. In order to carefully select the optimal design solution, it is necessary to take a large array of data related to energy efficiency indicators. In classic design systems, such information is not displayed or analyzed. It is very difficult to assess the energy efficiency of the project. The technology of building information modeling, or BIM, makes it possible to radically simplify the task of designing energy efficient buildings. The purpose of the article is to substantiate the use of modern programs based on VIM technologies at the stage of energy efficient building design, to determine the criteria for selecting a software complex that will allow you to perform building simulation, calculate energy efficiency indicators, analyze thermal bridges, visualize the results, and issue a package of working documentation within the framework of one program. Demonstrate a highly detailed three-dimensional model of the building enriched with maximum information: data on the thermal conductivity of building materials and technical characteristics of equipment.","PeriodicalId":228894,"journal":{"name":"Ukrainian Journal of Civil Engineering and Architecture","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128107953","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}
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