69439 2658-5553 AlfaBuild 18 3 18 2021 1-60
REV RUS 1801-1801 6506150284 0000-0003-1139-3164 Moscow State University of Civil Engineering Sainov Mikhail Petrovich mp_sainov@mail.ru
Moscow, Russian Federation
 0000-0002-5279-9550 Moscow State University of Civil Engineering Poslykhalin Yuriy Andreevich awer1999@mail.ru
Moscow, Russian Federation
 Asphalt Concrete Cores of Embankment Dams: a Review Asphalt concrete cores (ACC) have been used as seepage-control elements of embankment dams for a relatively short time, about 60 years. Relatively not many embankment dams with ACC have been constructed. However, at present, this type of dams is used more often. For assessment of advantages and disadvantages of dams with ACC we analyzed the history of their application. Materials and methods. For compiling a historical survey, there were used very old publications and modern sources. Results. The analysis shows that in the XX century, the dams with ACC were primarily constructed in European countries. In 1960-s in Germany, a reliable methodology of constructing diaphragms of compacted asphalt concrete permitted using this type of seepage-control element to construct high dams. In the XXI century, the dams with ACC became widely spread in all the continents. At present, the maximum height of dams with ACC reached 167 m. Another methodology of constructing diaphragms was developed and successfully applied in Russia, which was pored asphalt. This methodology is well adapted for use in severe climatic conditions of our country. The dams with ACC, their disadvantages, and the methods of their overcoming are analyzed. Conclusion. Dams with ACC are a very perspective type of embankment dams for use in severe climatic conditions; they are competitive with more spread types. Further refinement of structural designs of dams with ACC will be related to the enhancement of their safety. 10.34910/ALF.18.1 69 Bituminous Concrete embankment dam asphaltic concrete core dam hydraulic fracturing https://alfabuild.spbstu.ru/article/2021.18.1/ 1801.pdf
REV RUS 1802-1802 ABE-1858-2021 57208300172 0000-0003-0031-7270 Peter the Great St. Petersburg Polytechnic University Kotliarskaia Irina Leonidovna iravassilek@mail.ru
St. Petersburg, Russian Federation
 56227381900 0000-0003-2673-4566 Peter the Great St. Petersburg Polytechnic University Nemova Darya Viktorovna nemova_dv@spbstu.ru
St. Petersburg, Russian Federation
 Creating an Ice Surface for Indoor Ice Arenas. A Review The object of research is a complex of technological and structural operations to implement the ice cover of an indoor ice arena. An extensive scientific and regulatory framework is needed to create high-quality ice with specific parameters for different kinds of sports. A review of the scientific literature revealed a lack of information on this topic. A multi-layer structure under the ice is called a technological slab. The paper describes three fundamentally different types of technological slabs. Creating the most frequently encountered model on a concrete base is described in stages with recommendations. 10.34910/ALF.18.2 69 Ice arena Ice rink Indoor rink Ice mats Technological slab Heat supply system Cooling system Drainage system Electric coupling welding Butt welding Collector Polythene pipe https://alfabuild.spbstu.ru/article/2021.18.2/ 1802.pdf
RAR RUS 1803-1803 0000-0003-0090-1039 Moscow Power Engineering Institute Shikin Konstantin Sergeevich kostya.shikin@mail.ru
Moscow, Russian Federation
 Simplified Strain Curve Fit Algorithm Manufacturing includes the stage of product verification calculation. At this stage, it is important to have accurate, as close as possible to real mechanical or other characteristics, depending on the type of verification calculation. The object of research is identifying the parameters of the deformation curve of a metal or alloy. A method of constructing a hardening curve is considered, which makes it possible to reduce the number of operations required for this. The study is carried out on the example of a heat-resistant nickel alloy. Method. A method of constructing a hardening curve on a deformation curve is considered an approximation by three parameters: conditional yield stress, ultimate conditional strength, and static modulus of elasticity. The power-law approximation is carried out. A mathematical method of power approximation is used. Results. The average relative error of the approximating curve concerning the considered experimental curves does not exceed 1.56%. 10.34910/ALF.18.3 69 Approximation Deformation curve Conditional yield stress Conditional tensile strength Lambert function https://alfabuild.spbstu.ru/article/2021.18.3/ 1803.pdf
RAR RUS 1804-1804 0000-0002-6637-3059 Peter the Great St. Petersburg Polytechnic University Melehin Egor Markovich melehin.em@edu.spbstu.ru
St. Petersburg, Russian Federation
 57205072984 0000-0002-5527-0345 Peter the Great St. Petersburg Polytechnic University Mohireva Arina Olegovna mohirevaarina@mail.ru
St. Petersburg, Russian Federation
 0000-0002-1522-0618 Peter the Great St. Petersburg Polytechnic University Glebova Ekaterina Alekseevna ekaterin.glk@gmail.com
St. Petersburg, Russian Federation
 0000-0002-6961-0662 Peter the Great St. Petersburg Polytechnic University Savvateev Dmitriy Vitalevich Savvateevdv1999@mail.ru
St. Petersburg, Russian Federation
 0000-0003-4058-0882 Vyatka State University Ambarzumian Anzela Vardanovna anzhela.vardanovna@gmail.com
Kirov, Russia
 Application of BIM Technologies in the Smoke Removal and Fire Detection System in High-Rise Buildings The existing fire extinguishing systems are not economically efficient enough and do not take into account the scenario of fire development. At the same time, fire and smoke detection systems significantly worsen safety, since they create an addiction to false positives for users of premises. This article discusses a method for extracting data from a BIM model and their relationship with the operational model of a building for calculating fire risks. As a result, a way to reduce them is presented, by redirecting the flows of people using a monitoring system and using an interdisciplinary transition to implement an industrial fire extinguishing system in civil construction. When setting tasks for automated scenario selection, it is necessary to take into account multifactorial mathematical models of linear programming with several criteria, where the main one is complete evacuation, and auxiliary ones are minimizing damage to human health, minimizing economic losses for the operating organization, and others.   10.34910/ALF.18.4 69 FDS visibility assessment fire safety detector layout BIM exhaust ventilation modeling smoke removal systems Digital double CFD https://alfabuild.spbstu.ru/article/2021.18.4/ 1804-1.pdf
RAR RUS 1805-1805 0000-0001-8132-4848 South Ural State University Malikov Denis Anatolievich malikovda@bkl.ru
Chelyabinsk, Russian Federation
 0000-0003-4599-8938 CEO Composite Technology and Equipment Vasyutkin Evgeny Sergeevich evasyutkin@yandex.ru
Balashiha, Moscow region, Russian Federation
 0000-0002-7258-7395 St. Petersburg Metro SUE Burin Dmitrii Leonidovich
St. Petersburg, Russian Federation
 0000-0003-4761-0044 Housing Committee of St. Petersburg city administration Dzhalalov Andrei Igorevich
St. Petersburg, Russian Federation
 0000-0001-9325-2335 Peter the Great St. Petersburg Polytechnic University Ismailov Aleksei Marlenovich ismailov-aleksei@mail.ru
St. Petersburg, Russian Federation
 57211409697 0000-0003-1929-4566 Peter the Great St. Petersburg Polytechnic University Kovalev Mark Andreevich
St. Petersburg, Russian Federation
 0000-0001-8796-8820 Peter the Great St. Petersburg Polytechnic University Tokarev Vasiliy Olegovich
St. Petersburg, Russian Federation
 0000-0003-1807-1766 Military Academy of Logistics named after General of the Army A.V. Khruleva Birryukov Dmitriy Vladimirovich
St. Petersburg, Russian Federation
 Durability and Performance of Composite Pipes Under Conditions of Exposure to high Temperatures of the Transported Liquid The durability and serviceability of composite pipes under thermal and power influences (loads, strains) determine the safety factor for their calculation. Determination of the safety factor is reduced to the decision of deformations from thermal and force effects, at which the probability of failure will be maximum. This paper proposes determining the safety factor of composite pipes subjected to thermal and power loads. The safety factor serves as a measure of the mechanical reliability of composite pipes. It is a statistical value determined by probabilistic calculation methods, particularly the ratio of the mathematical expectation of the strength criterion to the mathematical expectation of the destructive factor’s value. The technique has been successfully tested (proved) for composite pipes for hot and cold-water supplies using various polymers.   10.34910/ALF.18.5 69 Polymer Fiberglass Composite pipes Heat load Durability Working capacity Safety factor https://alfabuild.spbstu.ru/article/2021.18.5/