Pub Date : 2019-01-01DOI: 10.26906/znp.2019.53.1880
S. Pichugin
The article presents the results obtained by scientific school «Reliability of building structures» for the spice of five years2015 – 2019. Some aspects of the general approach to structural reliability assessment have been developed. Currentnormative calculations of structures were combined with the assessment of their reliability. Engineering methods were developed that allow to take into account an increase snow loading on coverage of building of variable height, to estimate theprocesses of snow thawing on roofs of the heated buildings and snow laying on cold roofs. It were investigated the specificwind load in the mountainous Carpathian region and loads of travelling cranes of different producers. Reliability of steelstructures of trunk pipelines and reinforced concrete beams with carbon-fiber reinforcement has been evaluated. Workfeatures of sheet steel structures were investigated. Construction accidents have been analyzed
{"title":"SCIENTIFIC SCHOOL «RELIABILITY OF BUILDING STRUCTURES»: NEW RESULTS AND PRESPECTIVES","authors":"S. Pichugin","doi":"10.26906/znp.2019.53.1880","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1880","url":null,"abstract":"The article presents the results obtained by scientific school «Reliability of building structures» for the spice of five years2015 – 2019. Some aspects of the general approach to structural reliability assessment have been developed. Currentnormative calculations of structures were combined with the assessment of their reliability. Engineering methods were developed that allow to take into account an increase snow loading on coverage of building of variable height, to estimate theprocesses of snow thawing on roofs of the heated buildings and snow laying on cold roofs. It were investigated the specificwind load in the mountainous Carpathian region and loads of travelling cranes of different producers. Reliability of steelstructures of trunk pipelines and reinforced concrete beams with carbon-fiber reinforcement has been evaluated. Workfeatures of sheet steel structures were investigated. Construction accidents have been analyzed","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85776913","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1900
Yevhen Oksen
The method of forecasting the size and timing of sedimentation of structures on soils with silt layers, based on the results offield observations, has been developed. It is suggested to use a set of exponential dependencies with a constant component.The algorithm and software for calculation of the envelope by experimental data by a stepwise approximation are developed.The process of consolidation of soils is considered as a combination of simultaneous and independent flow of phases of primary filtration consolidation and secondary consolidation of creep. According to the results of data processing of observations by direct iterative calculations by finding the minimum nonconnectedness by the method of least squares.
{"title":"METHOD OF FORECASTING THE TERMS OF SETTLING OF STRUCTURES ON SOILS WITH SILT LAYERS","authors":"Yevhen Oksen","doi":"10.26906/znp.2019.53.1900","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1900","url":null,"abstract":"The method of forecasting the size and timing of sedimentation of structures on soils with silt layers, based on the results offield observations, has been developed. It is suggested to use a set of exponential dependencies with a constant component.The algorithm and software for calculation of the envelope by experimental data by a stepwise approximation are developed.The process of consolidation of soils is considered as a combination of simultaneous and independent flow of phases of primary filtration consolidation and secondary consolidation of creep. According to the results of data processing of observations by direct iterative calculations by finding the minimum nonconnectedness by the method of least squares.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88092005","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1886
Oleksandr Shkurupiy, P. Mytrofanov, Yuriy Davydenko, M. Hajiyev
One of the most powerful modern methods of calculating complex building structures is the finite element method in theform of a displacement method for discrete systems, which involves the creation of a finite element model, that is, splittingthe structure into separate elements within each of which the functions of displacements and stresses are known. On the basisof the displacement method and the methods of iterations and half-division, an algorithm for stability calculation of the firstkind equilibrium form of compressed reinforced concrete columns with hinged fixing at the ends, considering the stiffnesschanging has been developed. The use of the above methods enables to determine the minimum critical load or stress at thefirst bifurcation and their stability loss corresponding form. The use of matrix forms contributes to simplification of high order stability loss equation. This approach enables to obtain the form of stability loss that corresponds to the critical load.
{"title":"COMPRESSED ELEMENTS WITH A VARIABLE IN LENGTH STIFFNESS EQUILIBRIUM FORM STABILITY DETERMINATION","authors":"Oleksandr Shkurupiy, P. Mytrofanov, Yuriy Davydenko, M. Hajiyev","doi":"10.26906/znp.2019.53.1886","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1886","url":null,"abstract":"One of the most powerful modern methods of calculating complex building structures is the finite element method in theform of a displacement method for discrete systems, which involves the creation of a finite element model, that is, splittingthe structure into separate elements within each of which the functions of displacements and stresses are known. On the basisof the displacement method and the methods of iterations and half-division, an algorithm for stability calculation of the firstkind equilibrium form of compressed reinforced concrete columns with hinged fixing at the ends, considering the stiffnesschanging has been developed. The use of the above methods enables to determine the minimum critical load or stress at thefirst bifurcation and their stability loss corresponding form. The use of matrix forms contributes to simplification of high order stability loss equation. This approach enables to obtain the form of stability loss that corresponds to the critical load.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82957709","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1885
O. Orysenko, M. Nesterenko, O. Vasyliev, Ivan Rohozin
It has been established that in the process of operation pressure ratings in the tires of many cars differs from those recommended by the production plant. Is leads to performance degradation of tires traveling properties and their loss of life.The pressure excursion from the normative value may be caused either by an error during tire inflation, or by the fact that thedifference between the operating temperature and the temperature of the inflating air has not considered. Using athematicalstatistical methods of data processing, there has been deduced the mathematical relationship between pressure in the pneumatical tire at the operating temperature and the required pressure of inflating air into the tire, if the temperatures of inflationand operation differ.
{"title":"MATHEMATICAL MODEL OF PRESSURE CHANGE IN AUTOMOBILE PNEUMATICAL TIRE DEPENDING ON OPERATING TEMPERATURE","authors":"O. Orysenko, M. Nesterenko, O. Vasyliev, Ivan Rohozin","doi":"10.26906/znp.2019.53.1885","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1885","url":null,"abstract":"It has been established that in the process of operation pressure ratings in the tires of many cars differs from those recommended by the production plant. Is leads to performance degradation of tires traveling properties and their loss of life.The pressure excursion from the normative value may be caused either by an error during tire inflation, or by the fact that thedifference between the operating temperature and the temperature of the inflating air has not considered. Using athematicalstatistical methods of data processing, there has been deduced the mathematical relationship between pressure in the pneumatical tire at the operating temperature and the required pressure of inflating air into the tire, if the temperatures of inflationand operation differ.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85039138","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1893
Serhii Hudz, G. Gasii, Anton Нasenko, V. Dariienko
The article examines the features of determining the bearing capacity of the steel profile cross-section, rolled or composedfrom three sheets with arbitrary thickness, considering the development of plastic deformations in a complex combination ofdifferent power factors that may occur during spatial loss of stability. Based on a new approach to the perception character ofinternal forces, the goal is to investigate their ability to redistribute between separate linear elements, on which cross-sectionof the beam is broken. It is proposed to increase the savings of the material by detailing the calculation.
{"title":"PLASTIC BEARING CAPACITY OF THE STEEL ELEMENT CROSS-SECTION BY INTERNAL FORCES COMBINATION AND RESTRAINT","authors":"Serhii Hudz, G. Gasii, Anton Нasenko, V. Dariienko","doi":"10.26906/znp.2019.53.1893","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1893","url":null,"abstract":"The article examines the features of determining the bearing capacity of the steel profile cross-section, rolled or composedfrom three sheets with arbitrary thickness, considering the development of plastic deformations in a complex combination ofdifferent power factors that may occur during spatial loss of stability. Based on a new approach to the perception character ofinternal forces, the goal is to investigate their ability to redistribute between separate linear elements, on which cross-sectionof the beam is broken. It is proposed to increase the savings of the material by detailing the calculation.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74682789","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1894
A. Fenko, I. Yurko, A. Hasenko, O. Krupchenko, P. Yurko
The experimental technique and the experiment results on the influence of own stresses unevenly distributed over crosssection on materials strength and on scale effect are presented. The reasons for the occurrence and distribution of suchinfluence are analyzed. Based on the experiments results on fragile duralumin samples, the inevitability of influencing onscale effect in concrete during compression stresses, which are caused by unevenly shrinkage over cross section was proved.Possible reasons for the different (sometimes opposing) results of experimental studies of various authors on scale effect inconcrete in compression are explained. The influence of own stresses unevenly distributed over cross section on scale effectin concrete during compression, depending on samples size and concrete age, is analyzed in detail
{"title":"THE OWN STRESSES INFLUENCE ON SCALE EFFECT IN CONCRETE","authors":"A. Fenko, I. Yurko, A. Hasenko, O. Krupchenko, P. Yurko","doi":"10.26906/znp.2019.53.1894","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1894","url":null,"abstract":"The experimental technique and the experiment results on the influence of own stresses unevenly distributed over crosssection on materials strength and on scale effect are presented. The reasons for the occurrence and distribution of suchinfluence are analyzed. Based on the experiments results on fragile duralumin samples, the inevitability of influencing onscale effect in concrete during compression stresses, which are caused by unevenly shrinkage over cross section was proved.Possible reasons for the different (sometimes opposing) results of experimental studies of various authors on scale effect inconcrete in compression are explained. The influence of own stresses unevenly distributed over cross section on scale effectin concrete during compression, depending on samples size and concrete age, is analyzed in detail","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"143 32","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72492418","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1907
D. Storozhenko, Оleksandr Dryuchko, Yu. S. Golik, К. Kytayhora, Igor Gornitsky, Anton Misko
According to the developed methodology of the experiment and with the use of electronic devices for measuring the contentof carbon dioxide (CO2) in the air and using a set of special laboratory tools, the following were studied on the example of aschool audience: a) the variety of interactions of the external environment and the subsystem - classroom air; b) the activityof constituent internal objects (present students, plants, absorbent surfaces of structural elements and the interior) in releaseand absorption of CO2, depending on conditions and variation in the action of dominant factors; c) their manifestation and influence on forming the composition and content of the air mass, and therefore the internal microclimate of the classroom,which quality directly affects the health and performance of the present people.
{"title":"MONITORING ACTIVITY OF THE CO2 EMISSION OBJECTS SYSTEM COMPONENTS IN FORMATION OF THE AIR MASS IN INDIVIDUAL CLOSED PREMISES","authors":"D. Storozhenko, Оleksandr Dryuchko, Yu. S. Golik, К. Kytayhora, Igor Gornitsky, Anton Misko","doi":"10.26906/znp.2019.53.1907","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1907","url":null,"abstract":"According to the developed methodology of the experiment and with the use of electronic devices for measuring the contentof carbon dioxide (CO2) in the air and using a set of special laboratory tools, the following were studied on the example of aschool audience: a) the variety of interactions of the external environment and the subsystem - classroom air; b) the activityof constituent internal objects (present students, plants, absorbent surfaces of structural elements and the interior) in releaseand absorption of CO2, depending on conditions and variation in the action of dominant factors; c) their manifestation and influence on forming the composition and content of the air mass, and therefore the internal microclimate of the classroom,which quality directly affects the health and performance of the present people.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84593757","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 : 2019-01-01DOI: 10.26906/znp.2019.53.1906
O. Redkin, Oleksandr Zlepko, M. Pents
The scientific bases and practical recommendations for the construction enterprises of Ukraine on the progress of their structure and activity through the implementation of organizational and process innovations proposed in this work are considered.Such innovations are developed on the basis of studying and attracting the best world experience, the latest standards of management of construction investment projects, modern forms and methods of corporate management. Implementation of theproposed innovations will improve the quality, timeliness and efficiency of the construction of individual objects, should improve the structure, functions and performance of enterprises of the domestic construction complex, and ultimately - shouldincrease the competitiveness of the economy and social life in new economic conditions.
{"title":"ORGANIZATIONAL INNOVATIONS IN THE ACTIVITIES OF CONSTRUCTION COMPANIES IN UKRAINE IN THE TRANSITION TO WORLD STANDARDS OF MANAGEMENT","authors":"O. Redkin, Oleksandr Zlepko, M. Pents","doi":"10.26906/znp.2019.53.1906","DOIUrl":"https://doi.org/10.26906/znp.2019.53.1906","url":null,"abstract":"The scientific bases and practical recommendations for the construction enterprises of Ukraine on the progress of their structure and activity through the implementation of organizational and process innovations proposed in this work are considered.Such innovations are developed on the basis of studying and attracting the best world experience, the latest standards of management of construction investment projects, modern forms and methods of corporate management. Implementation of theproposed innovations will improve the quality, timeliness and efficiency of the construction of individual objects, should improve the structure, functions and performance of enterprises of the domestic construction complex, and ultimately - shouldincrease the competitiveness of the economy and social life in new economic conditions.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87032265","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 : 2018-10-12DOI: 10.26906/ZNP.2018.51.1308
M. Zotsenko, Y. Vynnykov, Yevheniy Shokarev, Аndriy Shokarev
A method for reducing the uneven deformations of a two-story building, which provides improving the construction properties of weak soils that lie at the base, by reinforcing them with horizontal soil-cement elements (SCE) of increased rigidity, carried out using a sand mixing technology, is described. SCEs are created in the mass under the base of the foundations and are formed as a result of the destruction of soil natural structure with its simultaneous mixing and injection of cement mortar under pressure. It has been established that the manufacture of SCE has a number of advantages: using of local soil as a material for their manufacture; adding to the soil only water and a binder, without additional aggregate; installation of elements on the site.
{"title":"Reinforcement of the foundation base of the building with horizontal elements of increased rigidity","authors":"M. Zotsenko, Y. Vynnykov, Yevheniy Shokarev, Аndriy Shokarev","doi":"10.26906/ZNP.2018.51.1308","DOIUrl":"https://doi.org/10.26906/ZNP.2018.51.1308","url":null,"abstract":"A method for reducing the uneven deformations of a two-story building, which provides improving the construction properties of weak soils that lie at the base, by reinforcing them with horizontal soil-cement elements (SCE) of increased rigidity, carried out using a sand mixing technology, is described. SCEs are created in the mass under the base of the foundations and are formed as a result of the destruction of soil natural structure with its simultaneous mixing and injection of cement mortar under pressure. It has been established that the manufacture of SCE has a number of advantages: using of local soil as a material for their manufacture; adding to the soil only water and a binder, without additional aggregate; installation of elements on the site.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79887071","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 : 2018-10-12DOI: 10.26906/ZNP.2018.51.1296
V. Mitinskiy, V. Chepelev, Y. Vynnykov, І. Lartseva, A. Aniskin
The characteristic properties of limestone-shell used as the base of foundation are described. Using the example of multi-storey residential building design, comprehensive solution has been proposed for plugging workings in an array of limestone-shell for the subsequent construction of slab-pile foundation, which includes engineering and geological surveys, geotechnical design, the choice of mortars and their compositions, as well as continuous monitoring plugging conditions. It is stated that two types of cement-sand mortar are used for plugging workings: the first is with the addition of superplasticizers, which provide high solution mobility, low water loss and non-shrinkage after hardening; the second is without adding superplasticizers with fluidity high degree. The results of laboratory studies to select the composition of soil-cement are given.
{"title":"Overall stabilization of underground workings in limestone-shells","authors":"V. Mitinskiy, V. Chepelev, Y. Vynnykov, І. Lartseva, A. Aniskin","doi":"10.26906/ZNP.2018.51.1296","DOIUrl":"https://doi.org/10.26906/ZNP.2018.51.1296","url":null,"abstract":"The characteristic properties of limestone-shell used as the base of foundation are described. Using the example of multi-storey residential building design, comprehensive solution has been proposed for plugging workings in an array of limestone-shell for the subsequent construction of slab-pile foundation, which includes engineering and geological surveys, geotechnical design, the choice of mortars and their compositions, as well as continuous monitoring plugging conditions. It is stated that two types of cement-sand mortar are used for plugging workings: the first is with the addition of superplasticizers, which provide high solution mobility, low water loss and non-shrinkage after hardening; the second is without adding superplasticizers with fluidity high degree. The results of laboratory studies to select the composition of soil-cement are given.","PeriodicalId":32910,"journal":{"name":"Zbirnik naukovikh prats'' Seriia Galuzeve mashinobuduvannia budivnitstvo","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79214098","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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