33407 2304-6295 9 72 2018 1-65

RAR RUS 7-30 Peter the Great Saint Petersburg Polytechnic University Cherenkov Ivan iacherenkov@atomproekt.com

Polytechnicheskay, 29

АО"АТОМПРОЕКТ", Санкт-Петербург г, ул.2-я Советская, д.9/2А, 191036 Roleder Aleksandr a_roleder@so2.spbaep.ru Prestress Losses of Containments of Reactor Buildings The Reactor Building is the most important part of the nuclear power plant. That’s why the protection of the Reactor Building and its accurate modelling is the basis of safe operation of the nuclear power plant. The most common type of reactor building structures is a double shell of monolithic reinforced concrete. The inner protective shell is performed prestressed. There are no specialized Russian standards for the calculation of prestressed inner protective shell. The formulas proposed by SP 63.13330.2012 in the calculation of long-term losses do not take into account the nonlinearity of deformations taking into account time, as well as many other factors. In the course of the work, various foreign standards were analyzed, and a compilation of theoretical and measured values was performed. 10.18720/CUBS.72.1 69 containment shrinkage creep NPP prestress https://unistroy.spbstu.ru/article/2018.72.1/ 9_72_1.pdf

REV RUS 31-45 E-6426-2019 56434340300 0000-0002-5694-1737 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Usanova Kseniia Iurevna plml@mail.ru

St. Petersburg, Russian Federation

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

B.E. Vedeneev VNIIG”, JSC,21, Gzhatskaya St., Saint Petersburg, Russia Fedorenko Yuliya Fedorenkoyup@vniig.ru B.E. Vedeneev VNIIG”, JSC,21, Gzhatskaya St., Saint Petersburg, Russia Kostyrya Sergey kostyryasa@vniig.ru Cold-bonded fly ash aggregate as a coarse aggregate of concrete The paper presents a brief study of fly ash lightweight aggregate concretes with aggregate obtained from fly ash of coal-fired thermal power plants. The research analyzes the cold-bonded fly ash aggregate from the Novosibirskaya GRES Thermal Power Plant (Novosibirsk, Russia). The paper experimentally investigates bulk density, water absorption, bulk crushing resistance, resistance to freezing and thawing. The experimental study shows that the water absorption of the coarse aggregate reaches 6.1%, while a cylinder compressive strength of aggregate accounts for 6.2 MPa. The obtained characteristics show that the analyzed aggregates can be effectively used in lightweight structural concrete. 10.18720/CUBS.72.2 69 fly ash aggregate cold bonded fly ash aggregate sintered fly ash aggregate pelletized fly ash granulated fly ash concrete cement https://unistroy.spbstu.ru/article/2018.72.2/ 9_72_2.pdf

REV RUS 46-60 6506150284 0000-0003-1139-3164 Moscow State University of Civil Engineering Sainov Mikhail Petrovich mp_sainov@mail.ru

Moscow, Russian Federation

Moscow State University of Civil Engineering (National Research University),26 Yaroslavskoye av., Moscow, 129337 Russia Yurieva Evgeniya dgein1997@mail.ru Structures of concrete faced rockfill dams in historical retrospective Concrete faced rockfill dams are attractive type of dams for construction of high-head projects on poorly developed and remote territories. Application of these dams in Russia is hindered by lack of experience in their designing and construction. This article gives a historical survey of developing structural designs and methodologies for construction of rockfill dams with reinforced concrete faces as well as describes up-to-date principles of their designing. It was revealed that the methodology of designing rockfill dams with reinforced concrete faces is based on the empirical approach. To have the possibility of refinement of these dams structural design it is necessary to determine the principles of their structural behavior at perception of external forces, make theoretical validation of structural designs. doi: 10.18720/CUBS.72.3 69 concrete faced rockfill dam construction joint historical review design theory https://unistroy.spbstu.ru/article/2018.72.3/ 9_72_3.pdf

RAR RUS 58-73 Donbas National Academy of Civil Engineering and Architecture Mushchanov Vladymyr mvf@donnasa.edu.ua

2, Derzhavin str., Makiyivka, Donetsk region, Ukraine, 86123

Donbas National Academy of Civil Engineering and Architecture,2, Derzhavin str., Makiyivka, Donetsk region, Ukraine, 86123 Tcepliaev Maxim m.n.cepliaev@donnasa.ru Ensuring the stability of the walls of the tanks based on the rational arrangement of the stiffening rings In this paper, we consider the problem of ensuring the stability of the walls of vertical cylindrical tanks through the most optimal arrangement of horizontal intermediate stiffening rings. The problem of determining the position is solved on the basis of the finite element method using the LIRA-CAD 2015 R4 program. Tanks with a volume of 10000 m3, 20000 m3 and 30000 m3 were considered. By using consistent modeling of tanks with different number and step of rings, were determine the factors of stability of the tank wall. According to the obtained data, dependences of the change in the stability factor on the number and pitch of stiffening rings are plotted. The feasibility study of the boundaries of the use of stiffening rings has been carried out. As a result, expressions for rational placement of rings are obtained. The use of the obtained expressions allows to increase the factor of stability of the wall by 2-5% compared with the placement, according to the current standards. At the same time, steel consumption does not increase. doi: 10.18720/CUBS.72.4 69 vertical cylindrical tank stress finite element method cylindrical shell local stress stiffening rings https://unistroy.spbstu.ru/article/2018.72.4/ 9_72_4.pdf