33407 2304-6295 10 49 2016 1-74

RAR RUS 7-19 Peter the Great St. Petersburg Polytechnic University Gilemkhanov Rustam asf-rust@ya.ru

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

Peter the Great St. Petersburg Polytechnic University Braila Natalya nashi-n-v@mail.ru

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

Methods of assessment of financial efficiency in construction projects The purpose of this article is to determine the most accurate methods of assessment of economic effectiveness of investment construction projects in crisis. Currently, in the Russian Federation, we observe a deterioration of the economic situation: the fall of the national currency and the solvency of the population, raising the key rate and the tightening of monetary policy by the Central Bank of the Russian Federation, rising inflation, economic sanctions against Russia, the volatility of the currency. In this regard, the demand for real estate falls, and the construction itself is expensive. Therefore, when a final selection of the developer of the project, the role properly evaluate the effectiveness of investments in a particular project. In other words, you need to choose a project that will bring maximum profit from the investments. This problem can be solved only by proper analysis of the effectiveness of future construction projects. Therefore, the aim of this article is to analyze the advantages and disadvantages of the main methods of valuation of efficiency of investment projects (NPV, IRR, PP, DPI, DPP). The result of the study came to the conclusions about the feasibility of using specific methods in the evaluation of investment construction projects. 10.18720/CUBS.49.1 УДК 69.003.13 building project; liquidity; net present value; payback period; investment; https://unistroy.spbstu.ru/article/2016.49.1/ 1_braila_49.pdf

RAR RUS 20-34 Peter the Great St. Petersburg Polytechnic University Kopylova Anastasiya nastya01021@mail.ru

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

Peter the Great St. Petersburg Polytechnic University Bogomolova Arina blum841233@yandex.ru

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

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

The energy efficiency of the building with application of green roof technology The problem of reducing energy consumption maintained buildings became a prerequisite for the improvement of energy-saving technologies. Energy efficiency and reduction of costs in the operation are realized by reducing heat loss through the outer covering. The innovative technology of green roofs has attracted increasing attention due to its engineering, warmth-economic, environmental benefits. Energy saving is achieved due to the high thermal insulation properties of the green roof. In this article structure of green roof and typical roof structure are considered as a covering for two buildings with different relations of square of covering to square of enclosing structures in Saint Petersburg. By results of the thermotechnical calculation are assessed the energy and economic efficiency of buildings with application of green roof technology. 10.18720/CUBS.49.2 УДК 692.4 green roof; building energy saving; energy efficiency; economic efficiency; consumption of heat energy; heat transmission resistance; thermal insulation; https://unistroy.spbstu.ru/article/2016.49.2/ 2_nemova_49.pdf

RAR RUS 35-58 57197818952 0000-0002-9822-3637 Technische Universitat Graz Dmitriev Ivan Igorevich i.i.dmitriev@yandex.ru

Graz, Austria

Geosynthetic materials for road construction Most design firms try to develop technologies to improve quality and durability of the roads. So, in new age, there are some material, called geosynthetics, which can reduce building and rebuilding cost, but leaving at the same level of eco and mechanic characteristics, or do them better. This article discusses the broad classification of geosynthetic materials on various characteristics. There are the basic use technologies and individual properties of each type of geosynthetics. It includes a brief historical reference and examples of use of geosynthetic materials on important transport facilities in Russia. 10.18720/CUBS.49.3 УДК 625.7/.8 road construction; highway engineering; geosynthetic materials; geosynthetics; geotextiles; geogrids; polymeric materials; https://unistroy.spbstu.ru/article/2016.49.3/ 3_dmitriev_49.pdf

RAR RUS 59-74 Peter the Great St. Petersburg Polytechnic University Mikhaylova Maria mmikhaylovaa@gmail.com

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

Peter the Great St. Petersburg Polytechnic University Dalinchuk Violetta dalinchuk_violet@mail.ru

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

Peter the Great St. Petersburg Polytechnic University Bushmanova Aleksandra nicealexa@mail.ru

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

Peter the Great St. Petersburg Polytechnic University Dobrogorskaya Luibov lubashka_95@mail.ru

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

Design, construction and operation of high-rise buildings, taking into account the aerodynamic aspects The registration of aerodynamics characteristic is very important for the safety of high-rise buildings. These buildings could have different shapes and aerodynamic of each is unique what makes its definition a complicated process. The aim of this work is to identify the main aspects of buildings’ aerodynamic. As part of the goal there are solve such problems as identifying ways of recognizing the aerodynamic characteristic of the building, review of the aerodynamic of building complex, identifying main factors influencing on formation and change of wind situation and also review of several methods of protection from wind on pedestrian level. There were examined the main factors that have a strong influence on the aerodynamic of the building and must be considered in design. There were detected that one of the most effective ways to determine the distribution of wind currents is to blow a building model in wind tunnel and that restrained urban conditions require the special attention in considering. 10.18720/CUBS.49.4 УДК 69 aerodynamics; high-rise buildings; wind streams; accelerated wind currents; windrose; wind loads; wind tunnel; https://unistroy.spbstu.ru/article/2016.49.4/ 4_dalinchuk_49.pdf