33407 2304-6295 Construction of Unique Buildings and Structures 4 9 2013 1-171
RAR RUS 1-17 AAH-2547-2019 7801686579 0000-0001-7011-8213 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Barabanshchikov Iurii Germanovich ugb@mail.ru
St. Petersburg, Russian Federation
 Interaction of hydrous dispersed mixtures with the metal surface The basic regularity of ceramic on metal surface friction process was ascertained on the base of experimental research. A mathematical expression which considered nonlinear dependence of friction principle was developed. The process of wear of metallic surfaces under the effect of a ceramic mass has been studied experimentally. An equation that relates the parameters of wear with moisture ceramic mixture. The coefficient of proportionality in the equation is the criterion of compatibility of materials in the friction system, it becomes minimum (the least wear) when the combination of materials is optimal. It is shown that friction of mineral dispersed systems on a metal produces an electrical effect, such as appearance of an electromotive force (friction-EMF) that is capable to maintain current in an external circuit as long as friction continues. The results of studies of electrization of dispersed systems show how influence various factors on this process. Discovered the effect of unilateral conductivity of the boundary layer during sliding friction. Based on the analysis of possible causes of electrization of dispersed systems during friction a hypothesis is advanced explaining this process by emission of cations from the counterbody metal due to a drop of the potential energy of ions in a structurally ordered boundary layer and a rise of the kinetic energy of cations in the metallic lattice as a result of collisions with atoms of the dispersed phase. It is shown that during friction ceramic mixture is released latent heat. This heat is not a dissipative process, but is associated with the reduction internal energy as a result of self-organization the structure. 10.18720/CUBS.9.1 69 investment energy efficiency thermal systems boiler heat pump annual total operations net present value payback period https://unistroy.spbstu.ru/article/2013.9.1/ 1_barabanshchikov_09.pdf
RAR RUS 18-28 Saint-Petersburg State Polytechnical University Belyaeva Svetlana sbelaeva@gmail.com
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 AAH-2547-2019 7801686579 0000-0001-7011-8213 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Barabanshchikov Iurii Germanovich ugb@mail.ru
St. Petersburg, Russian Federation
 Calculation of air gap between the protective screen and the shell of reinforced concrete cooling tower Article is devoted to a question of maintenance of effective protection of the cooling tower shell, using the screen with ventilated air gap. The purpose of the work is to determine the optimal parameters of the air gap by the calculation of heat and humidity and aerodynamic mode. In this article, there are calculations showing influence of temperature conditions and thickness of a ventilated air gap on warm, humidity and aerodynamic modes of its work.The thickness of the 140-160 mm of an air gap, provided on the heating air inlet gap, provides the ability to assimilate air moisture throughout the layer and to remove it in an atmosphere which prevents moisture condensation on cold surfaces of the concrete shell. 10.18720/CUBS.9.2 69 cooling tower air ventilated gap vapourproof screen fiberglass screen warm moisture protection corrosive effect air gap https://unistroy.spbstu.ru/article/2013.9.2/ 2_belyaeva_bababanshchikov_09.pdf
RAR RUS 29-35 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Kolosova Natalya nb.kolosova@yandex.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Berdyugin Ilya Efficiency of use of systems of automatic control of AccuGrade in construction Productivity and economic efficiency of construction works depends on that as precisely and quickly construction equipment works Earth and nivelirovochny works have to be performed in very short time therefore the success depends on the personnel and used tools. The System of Automatic Control (SAC) allow: to support working body (a dump, a mill drum, etc.) cars on a design mark in an automatic mode, to have the digital project in a car cabin that leads to increase in accuracy of works, reduction of alteration and refusal considerably from marking geodetic works. In article the analysis of economic efficiency of use of System of Automatic Control of Accugrade GPS/GLONASS (3D) is offered at earthwork for the device of a trench of laying of the sewerage. Use of Systems of Automated management of AccuGrade led to reduction of time of performance of work by 32% including due to the lack of need of performance of geodetic works. Due to the reduction of operating time of the excavator fuel consumption decreased by 28%, the volume of dredging of a material decreased by 16%, it was required a material for dumping of a banketka 60% less. 10.18720/CUBS.9.3 69 building machines earth excavation financial viability automatic control systems geodetic works https://unistroy.spbstu.ru/article/2013.9.3/ 3_berdugin_vatin_kolosova_09.pdf
RAR RUS 36-41 Saint-Petersburg State Polytechnical University Badanin Аndrey chinnab@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Saint-Petersburg State Polytechnical University Nurumbayeva Lunara telman_lunara@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Calculation of foundations for the group II limit states and its features The problems of the amendments made in the updated edition of SNIP 2.02.01-83 * "Foundations of buildings and structures" and SP 22.13330.2011 "Foundations of buildings and structures” are discussed in this article. In accordance with the newly adopted legal framework, restrictions, which were not theoretically justified anywhere, are accepted for all types of constructions. Therefore the identification of reasons of the amendments made is an actual problem. It is necessary to determine the decrease in reliability and increase in strain. Finding a theoretical solution of the justification of core depth and deriving practical recommendations for its determination are essential as well. 10.18720/CUBS.9.4 69 depth of the active zone strata geomechanics soil mechanics the calculation of precipitation https://unistroy.spbstu.ru/article/2013.9.4/ 4_badanin_nurumbaeva_09.pdf
RAR RUS 42-52 Saint-Petersburg State Polytechnical University Kolosova Galina
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Saint-Petersburg State Polytechnical University Kuroedov Vladimir
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Application of Krylov's functions for solving structural mechanical problems The constructed finite element stiffness matrix of a flexible beam based on Winkler. Within the item to the desired function beam deflection applied not approximate approximation and using an exact solution of the differential equation of the problem, defined functions Krylov. Examples demonstrate the effectiveness of the developed element. An analogy between the differential equations of the bending beam under Winkler and the differential equation of equilibrium of a flexible cylindrical shell under axisymmetric loading. Study the behavior of displacements and forces in the shell. We show by example the phenomenon of edge effect, built on the basis of functions Krylov. 10.18720/CUBS.9.5 69 fourth order differential equations Krylov’s functions beams based on Winkler finite element method the approximating functions stiffness matrix element cylindrical shell "edge effect" https://unistroy.spbstu.ru/article/2013.9.5/ 5_kolosova_kuroyedov_09.pdf
RAR RUS 53-63 Saint-Petersburg State Polytechnical University Salamakhin Stepan forstep@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 0000-0002-2952-5789 Peter the Great St. Petersburg Polytechnic University Sinelnikov AlekseiSergeevich alexey_sinelnikov@mail.ru
St. Petersburg, Russian Federation
 Modeling node screwing thin perforated steel profiles by finite element method In this paper, the main methods of modeling bolted connections, is considered the most appropriate way of modeling in the software package available for an average engineer. A method for the construction of three-dimensional design scheme of finite elements is considered an example of modeling the contact problem with the use of three-dimensional finite element analysis. This modeling method can be used for modeling a screw connection there, in the design of structural elements of perforated thin-walled steel profiles. 10.18720/CUBS.9.6 69 contact problem in Lira the scheme of the three-dimensional finite element in Lira components precision steel perforated profiles screw connection LSTC the calculation nodes LSTC https://unistroy.spbstu.ru/article/2013.9.6/ 6_salamahin_sinelnikov_09.pdf
RAR RUS 64-122 Kazan State Technological University Ubaydulloyev Madzhid madgidpwn@rambler.ru
Kazan, Russian Federation
 Increase of bearing capacity of operated constructions The article reviews the researches devoted to the problems of increasing load – carrying capacity of operated constructions. The procedures are presented to determine load – carrying capacity of the beam structures, strengthened under load. The models of stress – strain state of strengthening beam structures are given, taking into account stress and the deformations, accumulated at every stage of repair work. 10.18720/CUBS.9.7 69 strengthening repair stress assembly stress modeling variation method https://unistroy.spbstu.ru/article/2013.9.7/ 7_ubaydulloyev_09.pdf
RAR RUS 123-132 Saint-Petersburg State Polytechnical University Khvatov Yuri chvat@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Schislyaeva Elena ib.dep@igms.spbstu.ru Analysis of entrance testing’s results by IRT technology Mathematics entrance tests of the first year students allows the teacher to find out the state of the art of their readiness to study Higher Mathematics. Below there is a comparative analysis of the first year IGMS students testing resuts (IGMS - International Graduate School of Management). Students enrolled in 2010-2012 to both paid and budgetary places are considered. The analysis of testing results (for budgetary places in 2012), the quality of tasks and tests in general is held from the IRT perspective (IRT - Item Response Theory). The maintenance of test tasks corresponds to the program of a course of mathematics for high comprehensive school. For performance of tasks there are enough knowledge of a basic level. Results of testing were used when forming groups for additional classes on mathematics and for drawing up the program of work with these groups, including, besides the current subject, a number of sections from elementary mathematics. 10.18720/CUBS.9.8 69 entrance testing the analysis of results from positions of IRT (Item response theorie) a validity of tasks of test https://unistroy.spbstu.ru/article/2013.9.8/ 8_khvatov_schisliaeva_09.pdf
RAR RUS 133-150 Saint-Petersburg State Polytechnical University Chegotova Elena chegotova@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 The risks of builders, developers and investors This article is a review of the risks of developers, investors and builders, ways of their minimization, their relationship with the buyers of real estate, with government and among themselves. 10.18720/CUBS.9.9 69 development investors building real estate examination of project https://unistroy.spbstu.ru/article/2013.9.9/ 9_chegotova_09.pdf
RAR RUS 151-162 Saint-Petersburg State Polytechnical University Maskaleva Vera vera.maskaleva@gmail.com
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Principles of the pumping station design and pump selection The article describes the basic principles of designing systems of water pumping station. Special attention is paid to the choice of pumps. The article shows comparative characteristics of aggregates: productivity, energy consumption, water supply, pump head. Results of choice of pumps based on the amount of expenses for the entire period of their service are relevant. 10.18720/CUBS.9.10 69 pump station pump selection drainage water supply Life Cycle Cost LCC https://unistroy.spbstu.ru/article/2013.9.10/ 10_maskaleva_09.pdf
RAR RUS 163-171 Saint-Petersburg State Polytechnical University Alunin Andrey lz1989@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Saint-Petersburg State Polytechnical University Gorbovskaya Alla adgor45@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Saint-Petersburg State Polytechnical University Pavlov Sergey pavlov_s@list.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 The modern conditions of forest park “Aleksandrino” Firstly, results of morphological and chemical properties of soils are presented. Secondly, sites of trouble, reconsolidation and remoistening are revealed. Erosive processes of a soil cover, unsatisfactory condition of vegetation are noted. In addition, the analysis of a technical condition of meliorative system and the historical building is carried out, destructions of an engineering network and designs are revealed. As a result of carrying out inspection by authors the version of the project of works is offered. 10.18720/CUBS.9.11 69 soil vegetation land reclamation system technical condition historical building https://unistroy.spbstu.ru/article/2013.9.11/ 11_gorbovskaya_alunin_pavlov_09.pdf