33407 2304-6295 Construction of Unique Buildings and Structures 4 89 2020 1-49
RAR RUS 8901-8901 AAW-2838-2020 7003880429 0000-0002-5526-9862 Institute of Mechanics and Seismic Stability of Structures Academy of Sciences of the Republic of Uzbekistan Sultanov Karim Sultanovich sultanov.karim@mail.ru
Tashkent, Uzbekistan
 6506638355 0000-0003-0758-6158 Institute of Mechanics and Seismic Stability of Structures of the Academy of Sciences of the Republic of Uzbekistan Khusanov Bakhtiyar
Tashkent, Uzbekistan
 56527032000 0000-0002-2038-8298 Institute of Mechanics and Seismic Stability of Structures named after M.T. Urazbaev Loginov Pavel Viktorovich
Tashkent, Uzbekistan
 Namangan Engineering Construction Institute Normatov Sh.
Namangan, Uzbekistan
 Method for Assessing the Reliability of Earth Dams in Irrigation Systems Irrigation systems for irrigated agriculture begin with reservoirs and basins. The latter are formed with earth dams and levees. The reliability and stability of earth dams under static and especially dynamic loading is of paramount importance. Destruction of dam structures, reservoirs, can lead to disastrous environmental and economic losses. The methods and ways to ensure the reliability of earth dams are different. Under static (own weight, water pressure) and dynamic (vibrations, explosions, earthquakes) loads, the strength and stability of earth dams are calculated at the stages of their design. In this case, it is necessary to determine the failure surfaces (surfaces of possible collapse) of the dam slopes. The circular cylindrical method for finding the failure surface (surfaces of collapse) of slopes of a homogeneous earth dam under static (own weight) loading is considered in the paper. It is shown that when the value of the total stability coefficient is greater than unity, there are local sections of the slip line where stability is violated. This circumstance creates the possibility for a fracture line development under seismic loads. It is proposed to take into account seismic stresses in the soil mass based on the solution of basic equations of continuum mechanics. The numerical solution of wave equations for the soil mass is presented by the finite difference method with known boundary conditions and zero initial conditions. The dynamic stress-strain state of earth dam is determined taking into account its moisture content and elastic, viscous, and plastic properties of soil. The ways of considering dynamic stress state when calculating the reliability and stability of earth dams are shown. 10.18720/CUBS.89.1 69 Reservoirs Earth dam Reliability Stability Seismic impact Stress state Numerical solutions https://unistroy.spbstu.ru/article/2020.89.1/ 8901-13.pdf
RAR RUS 8902-8902 15730895100 0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander Sergeevich alsgor@yandex.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
 0000-0002-9362-0561 A.F. Mozhaysky's Military-Space Academy Rymkevich Pavel Pavlovich rymkewitch@yandex.ru
St. Petersburg, Russian Federation
 Climate change and the thermal island effect in the million-plus city A qualitative and quantitative analysis of changes in the outdoor temperature in St. Petersburg (Russian Federation) for the period from 1743 to 2018 was performed. (276 years old). Used data from open sources. It is shown how the annual average outdoor temperature in St. Petersburg, the average monthly air temperatures, as well as the air temperature during the warm and cold periods of the year, changed. Climate change is divided into stages lasting 50, 25, 10 and 5 years. The main sources of thermal pollution of the urban environment, including man-made. A quantitative assessment of the contribution of anthropogenic sources to the thermal pollution of the urban environment, which amounted to about 586 PJ per year. The main contribution to thermal pollution is provided by consumers of thermal energy (220 PJ per year), transport (220 PJ per year), consumers of electric energy (120 PJ per year), population (26 PJ per year). 10.18720/CUBS.89.2 69 Climate change Electric power utilization Energy utilization Energy Efficiency Urban planning Cooling energy consumption Global climate changes Heat-related mortality Integrated assessment Peak electricity demand Temperature increase Urban https://unistroy.spbstu.ru/article/2020.89.2/ 8902(1).pdf
RAR RUS 8903-8903 GUP "Saint Petersburg subway" Burin Dmitriy Leonidovich
St. Petersburg, Russian Federation
 LLC Composite Group Vasyutkin Sergey Fedorovich
Balashikha, Russian Federation
 0000-0001-9542-2430 StroyInvestCapital LLC Nurmukhametov Renat Rustamovich
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
 Kazan State University of Architecture and Engineering Mirsayapov Ilizar Talgatovich
Kazan, Russian Federation
 0000-0003-4599-8938 Composite Technology and Tooling Ltd. Vasyutkin Evgeny Sergeevich evasyutkin@yandex.ru
Balashiha, Moscow Region, Russian Federation
 FRP helical micro screw pile with cast iron pile cap: Review Calculation method of pipes’ FRP sections is proposed. Comparison of two options of piles’ bearing capacity calculations is made. Calculated bearing strength of the pipe’s sections for an axial load are compared to the results of site tests made earlier and soil’s bearing strength. Conclusions are made that existing calculation methods of soil’s bearing strength underneath helical piles are too conservative. Research provides results of bearing strength installed to weak clay helical fiberglass micropile. Pile was designed, produced and provided by Composite Group LLC. Pile is made with pultruded fibre reinforced polymer pipe and screw produced with cast iron. Screw is glued to the FRP pipe by epoxy. In addition rivets strengthen connection detail. This structure is stable for corrosion, ground electricity. FRP screw pile has small weight and high strength. 10.18720/CUBS.89.3 69 Auger Piles Fiberglass Composite Piles FRP Piles Micro Piles Screw Piles Fibre Reinforced Polymer Helical Piles Soft Clay https://unistroy.spbstu.ru/article/2020.89.3/ 8903.pdf
RAR RUS 8904-8904 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
 0000-0002-5534-7015 Peter the Great St. Petersburg Polytechnic University Shvets Georgii Andreevich renegat51rus@mail.ru
St. Petersburg, Russian Federation
 57194445595 0000-0001-8517-9705 Peter the Great St. Petersburg Polytechnic University Vinogradova Natalya Anatolevna natasha-vinograd@mail.ru
St. Petersburg, Russian Federation
 Bearing Capacity of Reinforced Concrete T-beams with a Steel Profile The object of research is a reinforced concrete T-beam element of prefabricated monolithic slabs with a thin-walled steel profile. Previously, the steel profile was used in the beams as a stay-in-place formwork, while the authors proposed to include it in the structural behaviour by anchoring. Four variants of T-beam elements have been tested to assess the influence of a thin-walled steel profile on the load-bearing capacity over normal sections. As a result, the strength capacity of reinforced concrete beams with anchored steel profile is 55% higher than the strength capacity of similar samples without steel profile. 10.18720/CUBS.89.4 69 Reinforced concrete Composite steel and concrete structures Experimental research Deformations Load bearing capacity https://unistroy.spbstu.ru/article/2020.89.4/ 8904(1).pdf
RAR RUS 8905-8905 7102546144 0000-0001-7651-1534 Automotive-road college Kirillov Andrei Mikhailovich kirill806@gmail.com
Sochi, Russian Federation
 Dielectric Constant of Asphalt Cocncrete Pavement The article investigates the temporal evolution of the dielectric constant of asphalt concrete pavement. Analysis of the electrophysical properties of the pavement makes it possible to monitor its operational properties and predict the residual life. Considered the relationship of the physico-mechanical properties of the asphalt mix (asphalt pavement) with its electrophysical properties, and the behavior of the dielectric constant of the coating during its operation. As a result, the following conclusions were drawn: 1) the dielectric constant, correlating with the adhesive and cohesive properties of the material, can serve as a parameter for monitoring the condition of pavements in order to assess the residual life of the pavement; 2) modeling of the asphalt concrete road mixture using a layered capacitor allows us to describe the evolution of its dielectric constant in good agreement with the actual behavior of this parameter during operation of the road surface. 10.18720/CUBS.89.5 69 Asphalt concrete Dielectric constant Adhesion Monitoring of the pavement Concrete pavement https://unistroy.spbstu.ru/article/2020.89.5/ 8905(1).pdf
RAR RUS 8906-8906 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
 SPKB Ltd Deriugin Konstantin Sergeevich deriuginkonstantin@gmail.com
St. Petersburg, Russian Federation
 ZAO Neftekhimproyekt Pushkarskaya Marina Andreevna m.pushkarskaia@gmail.com
St. Petersburg, Russian Federation
 Institute Samarkand College of Light Industry and Economics Urmanceva Karolina Alexandrovna
Samarkand, Uzbekistan
 Facade Systems Modal Analysis in Consideration its Own Dynamic Characteristics of the Frame This article studies the degree of the wind load dynamic component influence on the bearing capacity of the hinged ventilated facade systems (HFS) of a high-rise building. The research model is a reinforced concrete building with a HFS with variable number of storeys and with constant dimensions and identical floor plans over the entire height. As a design of the HFS, a scheme based on the T-profile with a step of brackets of 600 mm vertically and a pitch of guide racks of 500 mm horizontally is adopted. The number of storeys is taken as a variable parameter of the research model. The following tasks were solved in the work: determination of the natural frequencies of the HFS as a multi-span beam; determination of natural vibration frequencies of the facade systems together with a reinforced concrete building, determination of dynamic factors, and comparison of the obtained values. As a result of the work, it was shown that when determining the bearing capacity of the HFS of a high rise building, it is impossible to consider the facade system as a separate structure from the building. A methodology for modal analysis is proposed, which allows determining refined values of the natural frequencies of a substructure vibration and dynamic factor. 10.18720/CUBS.89.6 69 Hinged ventilated facade systems (HFS) Wind load Dynamic component of wind load Load bearing capacity High rise building Enclosing structures Dynamic factor Natural frequency of vibration Modal analysis https://unistroy.spbstu.ru/article/2020.89.6/ 8906.pdf
RAR RUS 8907-8907 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
 Condition Load Effect Factor of Profile Steel in Lightweight Steel Concrete Structures Lightweight steel concrete structures (LSCS) - an innovative building structure type that can be used both as load-bearing and as enclosing one. They consist of profiled steel - usually galvanized and cold-bent - filled with a monolithic foam concrete with a 400…1200 kg/m3 density, and with fiber cement sheets sheathing. In view of the current Standarts, codes and scientific literature there is no methodology for foam filling when calculating the strength of such structures, the goal is to determine the condition load effect factor of profile steel in LSCS. In this paper, based on experimental data, a comparison of two types of floor slabs is considered: LSCS fabricated of foam concrete with a density of 400 kg/m3 and similar slabs made of profile steel elements, fiber-cement sheets without filling with monolithic foam concrete. Three samples of panels of each type were loaded with uniformly distributed load, which gradually increased from zero to failure values using three jacks, each of which transmitted the load to the slab at two points. It has been experimentally proved that the foam concrete, despite its own extremely low strength class, actually includes in the operation, preventing such effects as stability local loss, crushing and profile steel elements cross-section warping and increases the slabs overall load capacity by 20-25%., which corresponds to a condition load effect factor of at least 1.2…1.25. 10.18720/CUBS.89.7 69 Lightweight steel concrete structures (LSCS) Slab panels Load-bearing capacity Profile steel condition load effect factor https://unistroy.spbstu.ru/article/2020.89.7/ 8907.pdf