33407 2304-6295 1 64 2018 1-49

RAR RUS 7-19 Tashkent Institute of Engineers of Irrigation and Mechanization of Agriculture Bazarov Dilshod dbazarov61@mail.ru

39, Kary-Niyazov str., Tashkent, Uzbekistan, 100000

Shkolnikov Sergey syashkolnikov@mail.ru Tashkent Institute of Engineers of Irrigation and Mechanization of Agriculture Mavlyanova Dildora dildoramav@mail.ru

39, Kary-Niyazov str., Tashkent, Uzbekistan, 100000

Tashkent Institute of Engineers of Irrigation and Mechanization of Agriculture Rayimova Ikboloy dbazarov61@mail.ru

39, Kary-Niyazov str., Tashkent, Uzbekistan, 100000

The form of a monoclinic wave propagating along an initially dry riverbed The problem of the propagation of a flood release wave in an initially dry wide rectangular riverbed with a constant slope and a bottom roughness is considered. Flood release waves occur in the tails of hydroschemes during the passage of high floods, as well as during short-term regulation of water course for energetics, irrigation, etc. The main method for problem solving on the propagation of flood release waves in riverbeds is mathematical modeling on the basis of differential equations for the streamflow - the Saint-Venant equations, using numerical methods. Analytical solutions of the Saint-Venant equations can be constructed only in rare cases. Nevertheless, these solutions are of great interest, since they are important tests for numerical methods. Comparison of the results of the numerical experiment and the analytical test showed a very good agreement, which gives grounds to recommend the applied technique for widespread use. 10.18720/CUBS.64.1 532.5 flood monoclinic wave hydraulic friction long-wave processes mathematical modeling Saint-Venant equation numerical method https://unistroy.spbstu.ru/article/2018.64.1/ 1_Bazarov_64.pdf

RAR RUS 20-35 Peter the Great Saint Petersburg Polytechnic University Sovetnikov Daniil sovetnikov.daniil@gmail.com

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Baranova Daria baranova-d@mail.ru

Polytechnicheskay, 29

AAV-2280-2020 48361113100 0000-0001-9004-7889 Riga Technical University, Riga, Latvia Borodinecs Anatolijs anatolijs.borodinecs@rtu.lv

Riga, Latvia

G-1611-2018 56352359500 0000-0002-5156-7352 Volgograd State Technical University Korniyenko Sergey Valeryevich svkorn2009@yandex.ru

Volgograd, Russian Federation

Technical problems in churches in different climatic conditions In buildings of cultural heritage, such as churches, it is quite difficult to ensure and to maintain the constant values of the indoor climate. Keeping a comfortable indoor environment throughout the year is a challenge due to special requirements for the preservation of the integrity of the interior decoration (frescoes, icons, stucco molding), strict canons to the exterior appearance, the presence of sharp peaks in the increase of hygrothermal parameters due to a peculiarly different number of visitors during church holidays compared to the rest of the year. Three churches described in this paper are situated in Russia and Latvia and despite different geographical position have similar problems: violation of the thermal insulation layer, problems with the provision of heat and humidity mode of condensation. The paper suggests possible ways of monitoring the state of the indoor climate of churches and possible solutions for its maintenance. 10.18720/CUBS.64.2 699.8 church indoor climate comfort temperature analysis hygrothermal regime https://unistroy.spbstu.ru/article/2018.64.2/

RAR RUS 36-49 Peter the Great Saint Petersburg Polytechnic University Semashkina Daria daria.semashkina@gmail.com

Polytechnicheskay, 29

Diagrid systems for low-rise buildings In the recent time diagrid structures are often used as the main framework for high-rise buildings due to structural efficiency and unique geometry. Structural features of this system allow to design the most innovative architectural solutions in the form and layouts of the building. Author of this article consider the possibility of using diagrid system for construction of low-rise public buildings and the effectiveness of such solution. The article describes the design of the shell frame and the calculation this of impact loads. The calculation results were compared with a structure with regular grid of columns. Conclusions about the effectiveness of the use of diagrid structures are described. 10.18720/CUBS.64.3 69.07 diagrid system building frame metal frame structural units diagrid structure https://unistroy.spbstu.ru/article/2018.64.3/ 3_Semashkina_64.pdf