The Kyiv National University of Construction and Architecture — better known under its former name Kyiv Civil Engineering Institute — is the largest and most important building and architectural university of Ukraine located in the nation's capital Kiev. Post address: Kiev, Povitroflotsky Avenue, 31, 03680 Wikipedia.
Bondar R.P.,Kyiv National University of Construction and Architecture |
Podoltsev A.D.,NASU Institute of Electrodynamics
Technical Electrodynamics | Year: 2017
The complex model with frequency-dependent parameters for calculation of electrodynamic shaker operating characteristics is offered. The parameters of an equivalent circuit of the device model are depended on frequency that provides increase of calculation accuracy. The influence of frequency on parameters of the electrodynamic shaker is researched with help of numerical field model. On the basis of the presented equivalent circuit, characteristics of the vibrator depending on frequency are calculated. The problem of calculation of operating characteristics by means of the complex model based on the equations of an electromagnetic field, electric and electromechanical circuits is solved.
Gumen O.M.,National Technical University of Ukraine |
Dovgaliuk V.B.,Kyiv National University of Construction and Architecture |
Mileikovskyi V.O.,Kyiv National University of Construction and Architecture
Hydraulic Engineering IV - Proceedings of the 4th International Technical Conference on Hydraulic Engineering, CHE 2016 | Year: 2016
We propose an approach for simplified simulation of turbulent subsonic flows with macrostructure such as jets and boundary layers between flows. Usually, we use Large Eddy Simulation (LES) by the same process as physical experiments but with virtual 3D models. Professor A. Tkachuk (Kyiv National University of Construction and Architecture) developed a theory for simulation of flows with small-scale turbulent structure. Based on the small influence of viscosity, he said that such flow can be considered as ideal liquid flow with foreign bodies—vortexes. We extend the theory for large-scale vorticity. This vorticity is more ordered because of geometric compatibility. We can simulate it using geometric and kinematic analysis avoiding differential equations. This work has a final list of assumptions and as an example results for jets in flows. The results can be used in atmospheric or reservoir flow simulation and calculation of energy-efficient and environmentally safe HVAC and sanitary technical systems. © 2016 Taylor & Francis Group, London, UK.
Sakharov V.O.,Kyiv National University of Construction and Architecture
Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues - 3rd Polish Congress of Mechanics, PCM 2015 and 21st International Conference on Computer Methods in Mechanics, CMM 2015 | Year: 2016
The study contains results of the numerical analysis of the seismic impact on massive constructions using Zymne Monastery Cathedral building as an example. The cathedral has been founded in X-XI century AD using mostly brickwork. Due to the numerous destructions, reconstructions, change of ownership through history between Poland, Soviet Union and Ukraine, the cathedral has a complex configuration and is now in the immediate need of strengthening its foundation. Simulation has been performed using FEM with modified explicit central difference method in the nonlinear formulation. The calculations involved a soil model that takes into account visco-elastic-plastic deformation properties, structural strength and water pressure in soil pores. The study also contains an analysis of the influence of nonlinear orthotropic properties of the brick masonry on the stress-strain state of the building and the estimation of the dynamic behaviour of the cathedral structures. It demonstrates the distribution of stress concentration zones and locations of the localized structural damage. Finally, it contains an analysis of the accumulated plastic deformations in the soil base that leads to an uneven foundation settlement and the estimations how water pressure in the soil pores affected the above-mentioned processes. © 2016 Taylor & Francis Group, London.
Malashevskyi M.,Kyiv National University of Construction and Architecture |
Bugaienko O.,Kyiv National University of Construction and Architecture
Geodesy and Cartography | Year: 2016
Land exchanges have been used around the world and are recognized as one of the principal ways of land reallocation. At the moment, placement of facilities and socially and environmentally important objects in the existing housing is of special importance in Ukraine. There is a need for finding ways of increasing the effectiveness of such projects with the help of peer exchange. With this aim, engineering solutions for the built-up land exchange should be found. Research, provided in this paper, aims at substantiating peer land plot exchange calculation at the inhabited locality improvement. Key factors defining value of the built-up land (or the land to be built-up) have been defined. Placement and physical characteristics, which should be taken into consideration to achieve the land exchange equality, have been singled out. Based on the existing calculation of peer agricultural land exchange in Ukraine a methodology for built-up (or to be built-up) land, which considers the peculiarities of the land usage, has been proposed. Calculation of peer built-up (or that to be built-up) urban land exchange has been presented. Technical data characterizing the main influence factors in the discourse of the provided land exchange approach have been offered. The calculation algorithm on the example of peer residential housing land plot exchange in Kyiv has been provided. © 2016 Vilnius Gediminas Technical University (VGTU) Press.
Yerukayev A.,Kyiv National University of Construction and Architecture
Modern Problems of Radio Engineering, Telecommunications and Computer Science, Proceedings of the 13th International Conference on TCSET 2016 | Year: 2016
A model that determines the influence of the factors to urban regions for housing construction is under consideration is proposed in this report. For disclosure of the influence process the technology is used, which is based on fuzzy sets and which is extended to type-2. The basic theoretical aspects are described using sets and graphs that are elucidated in soft computing format. © 2016 National University Lviv Polytechnic.
Pushkarova K.,Kyiv National University of Construction and Architecture |
Sukhanevych M.,Kyiv National University of Construction and Architecture |
Martsikh A.,Kyiv National University of Construction and Architecture
Materials Science Forum | Year: 2016
One of the most important problem of concrete durability is increasing of waterproofing. Researches are devoted studying of cement mortars modified by carbon nanotubes, dispersed in plasticizers solutions. Were investigated physico-mechanical properties of cement paste, cementsand mortar into which structure entered untreated carbon nanotubes (production of plant TM “Spetsmash” Kyiv, Ukraine) in various quantity. Were used as plasticizers in cement compositions additives substances of the various chemical nature-naphtaleneformaldehyde, melamineformaldehyde and polycarboxylate. Quantity of untreated nanotubes varied from 0,5%; 1,0% and to 1,5%. Concentration of additives was accepted taking into account recommendations of producers and made about 1% from the weight of cement. Were studied some technological processes of introduction untreated carbon nanotubes in cement system and is shown that the way of introduction of nanomodifiers has essential impact on strength characteristics of cementitious materials. Optimum decision introduction of untreated carbon nanotubes is using its in dispersion plasticizer of the working concentration prepared in an ultrasonic dispergator is established. Results of physico-mechanical tests of cement paste and cement-sand mortar showed positive influence at introduction of untreated carbon nanotubes as cement modifiers on strength characteristics of samples. Resalts is shown that the nanomodifier, used quantity about 1% in solution of lignosulfonate with polycarboxylate and melamineformaldehyde plasticizer has great impact on strength characteristics. © 2016 Trans Tech Publications, Switzerland.
Moskalenko O.,Kyiv National University of Construction and Architecture |
Runova R.,Kyiv National University of Construction and Architecture
Materials Science Forum | Year: 2016
The connection with the icing on the frost resistance of concrete containing slag cement and chemical additives “MC Bauchemie” under freezing and thawing. It is shown that freeze concrete samples at (-) 10°C increase in the amount of slag from 30 to 70 wt.% Of binder in the composition leads to an increase in the index of ice formation in the concrete of 1.7…1.9 times compared with the concrete obtained at a slag containing slag cement with a content of 10 wt.%. Frost resistance of concrete is reduce from F450 to F400. When freezing of concrete samples at (-) 20°C increase in the amount of slag from 30 to 50 wt. % binder in the composition leads to an increase in the index of ice formation in the concrete of 1.7 times compared with the concrete obtained on slag cement containing slag with a content of 10 wt.%. Frost resistance of concrete is reduce from F400 to F350. The concrete on the slag containing cement with slag 70 wt. % is observed a slight decrease in ice formation. However, its value is 1.4 times higher than ice formation in concretes containing slag in an amount of 10 wt. %. Mark on frost resistance remains at F350. The smallest ice formation, regardless of the content of the slag into the slag containing cement, concrete characterized in that use complex organo-mineral supplement SX (5%) + SP (0.6%) in the amount of 5.6%. According to the degree of influence of additives used to reduce ice formation in the slag in concretes, containing cements can be ranker number: SX (5%) + SP (0.6%) > NC (5%) + SP (0.6%) > SP (0.6%). © 2016 Trans Tech Publications, Switzerland.
Kravchenko I.,Kyiv National University of Construction and Architecture |
Luhmann T.,University of Oldenburg |
Shults R.,Kyiv National University of Construction and Architecture
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Year: 2016
For the preparation of modern specialists in the acquisition and processing of three-dimensional data, a broad and detailed study of related modern methods and technologies is necessary. One of the most progressive and effective methods of acquisition and analyzing spatial data is terrestrial laser scanning. The study of methods and technologies for terrestrial laser scanning is of great importance not only for GIS specialists, but also for surveying engineers who make decisions in traditional engineering tasks (monitoring, executive surveys, etc.). The understanding and formation of the right approach in preparing new professionals need to develop a modern and variable educational program. This educational program must provide effective practical and laboratory work and the student's coursework. The resulting knowledge of the study should form the basis for practical or research of young engineers. In 2014, the Institute of Applied Sciences (Jade University Oldenburg, Germany) and Kyiv National University of Construction and Architecture (Kiev, Ukraine) had launched a joint educational project for the introduction of terrestrial laser scanning technology for collection and processing of spatial data. As a result of this project practical recommendations have been developed for the organization of educational processes in the use of terrestrial laser scanning. An advanced project-oriented educational program was developed which is presented in this paper. In order to demonstrate the effectiveness of the program a 3D model of the big and complex main campus of Kyiv National University of Construction and Architecture has been generated.
Faizi M.S.H.,Sultan Qaboos University |
Prisyazhnaya E.V.,Kyiv National University of Construction and Architecture
Acta Crystallographica Section E: Crystallographic Communications | Year: 2015
The whole molecule of the title complex, [Hg2Cl4(C18H15N3)2], is generated by inversion symmetry. It was synthesized from the pyridine-derived Schiff base N-phenyl-N'-[(pyridin-2- yl)methylidene]benzene-1,4-diamine (PPMBD). The fivecoordinated Hg2+ ions have a distorted square-pyramidal environment defined by two N atoms, viz. the imine and the other pyridyl [Hg-N = 2.467 (6) and 2.310 (6) A , respectively] belonging to the bidentate iminopyridine ligand, and three Cl atoms [Hg-Cl = 2.407 (2), 2.447 (2) and 3.031 (2) A ]. The longest Hg-Cl bond is bridging about the inversion centre. In the ligand, the central ring and pyridine ring are oriented at a dihedral angle of 8.1 (4)°, while the planes of the pyridine ring and the terminal phenyl ring are oriented at a dihedral angle of 53.8 (4)°. In the crystal, molecules are linked by N-H⋯Cl and C-H⋯Cl hydrogen bonds, forming sheets parallel to (001).
Udod V.M.,Kyiv National University of Construction and Architecture |
Yatsiv M.Y.,Kyiv National University of Construction and Architecture
Journal of Water Chemistry and Technology | Year: 2013
Modern ecological control methods of the state of hydro-ecosystems of river basins have been developed for ensuring their sustainable development, assessment of self-recovery properties of aquatic ecosystems that are a reflection of intra-water-body processes. For the first time ever the index of hydro-ecosystem development was proposed for conducting the ecological control of such systems. © 2013 Allerton Press, Inc.