33407 2304-6295 10 61 2017 1-41

REV RUS 7-21 Peter the Great St. Petersburg Polytechnic University Kiryudcheva Anastasia kirudcheva@mail.ru G-2929-2018 56227381900 0000-0003-2673-4566 Peter the Great St. Petersburg Polytechnic University Sergeeva (Nemova) Darya Viktorovna darya0690@mail.ru

St. Petersburg, Russian Federation

Strongly reinforced concreting design of cast concrete alloy mixtures Energy service contracts - one of the effective tools for the modernization of energy systems. Russian and foreign scientists are studying the mechanisms of energy service contracts, but in spite of the large amount of information on this subject, there is no comprehensive review of the use of energy service contracts in Russia and the European Union. The purpose of this article is a comprehensive analytical review of the use of energy service contracts in the EU and Russia. The article gives examples of energy service contracts, in practice, made a comparison of the use of energy service contracts in Russia and in the EU, to identify promising direction of development of energy service activities in Russia, taking into account the EU experience. 10.18720/CUBS.61.1 69 energy service contracts energy efficiency energy efficiency program energy audit energy saving https://unistroy.spbstu.ru/article/2017.61.1/ 1_Kirdyucheva_61.pdf

RAR RUS 22-29 Peter the Great St. Petersburg Polytechnic University Borisov Nikita borisov_n@spbstu.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Peter the Great St. Petersburg Polytechnic University Lebedeva Kseniya ksenialebedeva8@gmail.com

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Peter the Great St. Petersburg Polytechnic University Pecherskikh Mariya rostomyan868@gmail.com

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Modern geodetical coordinates of Saint Petersburg polygonometry The object of this work is geodetic points. The spread of a unified coordinate system is one of the main tasks of geodesy. This task is implemented by creating state geodetic networks: combination of geodetic points which are fixed on the site by special centers and their coordinates are determined. Reference and survey networks are geodetic basis of large-scale fieldworks. It is important to know location of such points because overall planning and leveling works are carried out with reference to the coordinates for these points. The determination of the polygonometric points coordinates was carried out with geodetic receiver GRX-1, two GPS navigators and two mobile phones equipped with modern geolocation chips. The comparison of coordinates showed that there is difference between data gauged with the use of conventional and modern methods. The difference is from 0.06” to 0.49” latitude that complies afield to range from 0.90 m to 7.35 m; from 0.03” to 0.54” longitudinally that complies afield to range from 0.90 m to 16.20 m. The study established that known coordinates of the local (urban) geodetic network points require being clarified using modern geoposition methods. Moreover, further researches are needed in this area. 10.18720/CUBS.61.2 69 local network urban polygonometry geodetical coordinates satellite navigator satellite geodetic receiver https://unistroy.spbstu.ru/article/2017.61.2/ 2_Borisov_61.pdf

RAR RUS 30-41 St. Petersburg State University of Architecture and Civil Engineering Vorontsova Natalia vorontsova.ns@gmail.com

2-nd Krasnoarmeiskaya St. 4, 190005 St. Petersburg, Russia

St. Petersburg State University of Architecture and Civil Engineering Morozov Valery morozov@spbgasu.ru

2-nd Krasnoarmeiskaya St. 4, 190005 St. Petersburg, Russia

Finite element modeling of fiber reinforced concrete members under biaxial bending In construction practice members subjected to biaxial bending are often encountered, however, for fiber reinforced concrete members, the task of strength evaluation is not regulated by modern normative documents and, moreover, has not previously been considered in our country. Investigations carried out by a number of authors have created the prerequisites for the possibility of using high-strength reinforcement without prestressing in flexural members. In this article, an attempt is made to use high-strength reinforcement in fiber reinforced concrete members under biaxial bending without prestressing. The problem of numerical investigation of reinforced concrete and fiber reinforced concrete members subjected to biaxial bending in the ANSYS software is solved. The research models are described: characteristics of materials, types of final elements, the sizes, the scheme of loading and support of reinforced concrete and fiber reinforced concrete members. The problem is solved in a nonlinear statement. The obtained data characterizing the stress-strain state of the reinforced concrete and fiber reinforced concrete members subjected to biaxial bending are analyzed. The results of numerical simulation of reinforced concrete and fiber reinforced concrete members are compared. The change in the position of the neutral axis and the load-bearing capacity with increasing angle of inclination of the plane of loading is considered. In conclusion, the results of the study are presented. 10.18720/CUBS.61.3 69 fiber reinforced concrete biaxial bending ANSYS numerical simulation stress-strain state finite element model https://unistroy.spbstu.ru/article/2017.61.3/ 3_Vorontsova_61.pdf