33407 2304-6295 Construction of Unique Buildings and Structures 7 70 2018 1-71
RAR RUS 1-21 G-1611-2018 56352359500 0000-0002-5156-7352 Volgograd State Technical University Korniyenko Sergey Valeryevich svkorn2009@yandex.ru
Volgograd, Russian Federation
 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
 15730895100 0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander Sergeevich alsgor@yandex.ru
St. Petersburg, Russian Federation
 57190865804 0000-0002-8136-3246 Peter the Great St. Petersburg Polytechnic University Olshevskiy Vyacheslav Ianushevich 79119199526@yandex.ru
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Pestryakov Igor pestr47@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Thermophysical quality of outer walls made of autoclaved aerated concrete blocks The object of research are apartment residential buildings located in various climatic zones of the Russian Federation with application of outer walls made of autoclaved aerated concrete blocks. Based on the results of thermovision quality inspection of thermal insulation the temperature anomalies and defects in outer walls are revealed. The rules of division of wall made of autoclaved aerated concrete blocks on a heat-shielding elements are formulated. Using the original method the evaluation of thermophysical quality of the outer walls made of autoclaved aerated concrete blocks is executed. The analysis of results shows that thermophysical influence of knots of building elements without additional thermal insulation is considerable and makes from 48 to 50%. Interfaces of walls to interfloor and balcony plates have the greatest thermophysical influence that is caused by the big extent of these knots. In such constructive decision these knots don't provide the requirement of full thermal insulation. The lack of an additional heat-insulation layer reduces thermophysical quality of a design in general (relative resistance to heat transfer is 0.7...0.71). Additional thermal insulation of a wall outside with application of highly effective insulating products levels the temperature field, reduces thermophysical influence of knots to 16% and increases thermophysical quality of a design (r = 0.75). Based on the results of contact measurements of values of temperatures and thermal streams in natural conditions the actual values of resistance to a heat transfer of the studied types of walls are defined. Additional external thermal insulation significantly improves thermophysical properties on the base surface of walls. The received results can be used at specification of calculated operational parameters of facade systems with outer walls made of autoclaved aerated concrete blocks of various types of building in the Russian Federation. 10.18720/CUBS.70.1 69 civil engineering AAC outer walls heat monitoring heat insulation thermophysical quality energy conservation energy efficiency https://unistroy.spbstu.ru/article/2018.70.1/ 1_70.pdf
RAR RUS 22-30 Belarusian-Russian University Moskalkova Yuliya julia43@tut.by
Mogilev, Belarus
 Belarusian-Russian University Semenyuk Slava skzs@tut.by
Mogilev, Belarus
 Methods for determining the limits of the microcrack formation Microcracking is one of the fundamental characteristics of concrete behavior. Existing dependencies to determine the relative values of the limits of microcrack formation are currently losing their relevance, since they were derived for conventional concrete, and in construction, concretes of various types improved strength and/or deformability are increasingly used. In this paper new empirical relationships are proposed for determining the relative values of the mi-crocrack formation limits. The proposed fomulas are universal and can be applied to determine the limits of microcracks formation for concretes of various types (studied normal concrete, steel fiber concrete, claydite, concrete with the use of a cupola slag as a fine aggregate). The type of concrete is taken into account by the empirical coefficient kcrc. The coefficient value depends on the ratio of the relative values of the lower ηcrc0 and the upper ηcrcv microcrack formation limits (ηcrc0 / ηcrcv = const). The research was carried out within the frame-work of the state program of scientific research in the field of “Physical Materials Science, New Materials and Technologies” at the Belarusian-Russian University. Comparison of the calculation results and experimental data (own and other researchers) showed good convergence: the deviation of the calculated values from the experimental data is 4–7%. Evaluation of the va-lidity and reliability of the proposed mathematical model was performed according to the Eurocode. In conclu-sion, the prospects for further research are also given. 10.18720/CUBS.70.2 69 concrete claydite steel fiber concrete by-products cupola slag limit of microcrack formation https://unistroy.spbstu.ru/article/2018.70.2/ 2_70.pdf
RAR RUS 31-42 Peter the Great St. Petersburg Polytechnic University Simankina Tatiana talesim@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Braila Natalya nashi-n-v@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Romanovich Marina r-marina21@rambler.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Roshkovanova Anastasiya
St. Petersburg, Russia
 Peter the Great St. Petersburg Polytechnic University Talipova Liliia
St. Petersburg, Russia
 Peter the Great St. Petersburg Polytechnic University Kosyakov Egor
St. Petersburg, Russia
 Strategies for redevelopment of gray belt objects on the basis of neural networks The article considers the approaches for objects redevelopment in the gray belt. Information was collected about 45 objects located in different administrative districts of the city. As the criteria for clustering objects, general factors (year of construction of the building, сost of building restoration in prices of 1969, actual сost of building in prices of 1969, height, volume, number of stores, total building area, fundamental group, function) and factors on physical  deterioration (wear of roof, floors, walls, foundation, finishing, MEP, total wear) were chosen. As a result of the study, SOMs with different learning parameters were created. As a result of the research, it was established how to change and select the desired redevelopment strategy for the zones of the gray belt, depending on the leaning parameters of the SOM and the individual characteristics of objects entering the gray belt. 10.18720/CUBS.70.3 69 industrial zones gray belt redevelopment neural networks clusters https://unistroy.spbstu.ru/article/2018.70.3/ 3_70(1).pdf
UNK RUS 43-59 Peter the Great St. Petersburg Polytechnic University Zhuvak Oksana zhuwak2010@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 AAE-3259-2020 56296687300 0000-0002-2299-3096 Peter the Great St. Petersburg Polytechnic University Rybakov Vladimir Alexandrovich fishermanoff@mail.ru
St. Petersburg, Russian Federation
 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
 C-6381-2019 56226922300 0000-0002-9445-5027 Peter the Great St. Petersburg Polytechnic University Korsun Volodymyr Ivanovich korsun_vi@mail.ru
St. Petersburg, Russian Federation
 Saint-Petersburg State Polytechnical University Velichkin Victor V.Velichkin2011@yandex.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Peter the Great St. Petersburg Polytechnic University Kozinets Galina galina4410@yandex.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Precast-monolithic reinforced concrete beam-slabs technology with claydit blocks This article describes the technology of construction of precast-monolithic beam slabs consisting of "TERIVA" beams, claydite concrete blocks located in the direction perpendicular to the beams, over which the upper reinforcement is laid on the construction site and heavy concrete is poured. In turn, the beams that make up the overlap are a mini-truss manufactured in the factory, the top and diagonal chords of which is a trigon trigon (reinforcement frame), and the lower one is a small reinforced concrete chord. The article describes 9 types of design solutions, each of them has a range of bearing capacity depending on the type and value of loads and the size of the span. To justify the bearing capacity, the method of limiting equilibrium is used. 10.18720/CUBS.70.4 69 reinforced concrete precast-monolithic slabs claydite concrete blocks beam "TERIVA" trigon limite quilibrium method https://unistroy.spbstu.ru/article/2018.70.4/ 4_70.pdf
RAR RUS 60-71 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia Belkina Tatyana Belkina18.1996@gmail.com 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
 Peter the Great St. Petersburg Polytechnic University Muratova Anna ann-muratova@inbox.ru
St. Petersburg, Russia
 The influence of the temperature and the structure of snow on the roof covering Analysis of the highest snow load is important in the process of designing of a roof structure. It is also necessary to take into account a coefficient of snow friction in addition to the main stages of calculation. This parameter may depend on the structure and temperature of the snow and the coating material. The dependence of the friction coefficient of these parameters were determined using techniques developed by research and testing laboratory “Polytech-SKiM-Test” with using of tribometer. Various snow conditions and two types of roof coverings - PVC-tent and Pural were considered in the research. The results of experiments are the dependencies of the coefficient of friction on various materials and slipping speeds. Moreover, values of frictional forces of the snow on the coating at different temperatures were defined. 10.18720/CUBS.70.5 69 snow load friction of snow roof destruction roof covering tribometer https://unistroy.spbstu.ru/article/2018.70.5/ 5_70.pdf