33407 2304-6295 11 50 2016 1-51

RAR RUS 7-21 Donbas National Academy of Civil Engineering and Architecture Belous Alexey us28@ya.ru

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

Donbas National Academy of Civil Engineering and Architecture Overchenko Mira miro4ka8@mail.ru

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

Donbas National Academy of Civil Engineering and Architecture Belous Olga olga.belaus@yandex.ua

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

Insulation of the basement unit buildings with unheated basement In the article the question of basement insulation of external walls of the large-block buildings with unheated basement. Proposed seven options of warming in this site. The temperature field and the heat transfer coefficients determined line built for the considered node. Separately, we consider the situation of the local thermal insulation in buildings, thermo past. A comparative analysis of insulation, found advantages and disadvantages of the proposed options. It was found that the additional insulation in the basement of the building with a basement reduces overall heat loss from the building only 1,0 ... 1,5% compared to the embodiment of thermo-insulation of the building without additional ground node. Thus, the insulation of the basement of the building with unheated basements significantly affect the overall heat loss from the building, and calls into question the appropriateness of the requirements for insulation basement units. 10.18720/CUBS.50.1 УДК 697.148 ground unit; insulation; thermal calculation; temperature field; energy-efficiency; https://unistroy.spbstu.ru/article/2016.50.1/ 1_belous_50.pdf

RAR RUS 22-36 Peter the Great St. Petersburg Polytechnic University Grinfeld Gleb greenfeld@mail.ru

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

Ural Federal University named after first president of Russia B.N. Yeltsin Vishnevskiy Andrey vishnevskiya@yandex.ru

620002, Mira Str. 19, Ekaterinburg, Russia

Masonry units with high percentage of holes in a facing laying of external walls The defects of masonry in outer layers of walls of buildings with the bearing framework are considered. Consideration is conducted in the form of opposition to abstracts of article suggesting to forbid use of a hollow brick and stones in a laying of facades of buildings. It is shown that the percent of holes in masonry units is not the factor directly influencing operational reliability of facing layings. Examples of mass successful application of a brick and stones with high hollowness in housing construction of St. Petersburg are given. Insolvency of attempts of a prohibition on use of hollow products is proved in facing of external walls. 10.18720/CUBS.50.2 УДК 693.2 masonry units with holes; facing masonry; masonry of external walls; operational reliability; masonry walls; masonry units; hollow bricks; energy efficiency; enclosing structures; civil engineering; https://unistroy.spbstu.ru/article/2016.50.2/ 2_grinfeld_50.pdf

RAR RUS 37-51 Peter the Great St. Petersburg Polytechnic University Bespalov Vladimir chanchullero@yandex.ru

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

Peter the Great St. Petersburg Polytechnic University Zimin Sergej zimin_sergei@mail.ru

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

The strength of masonry vaulted structures Comprehensive analysis of the possible approaches to determining the strength of masonry was performed. The classical theories of strength is not suitable for this purpose due to absence of taking into account the anisotropy of masonry, which determines the presence of a complex relation between the strength and the orientation of principal stresses to mortar joints. Russian and foreign criteria of masonry strength were evaluated. It is shown that these criteria are only suitable for in-plane stress and require a large amount of input data, which are extremely difficult to obtain. Fundamental approaches to the finite element modeling of masonry were considered. On the basis of these approaches the simulation of few brick vaults was performed. According to the results of simulation and analysis of existing criteria, it was proposed to adapt these criteria for the case of triaxial stress state and also develop the strength tests of masonry samples simulation model as source for input data. 10.18720/CUBS.50.3 УДК 693.2 strength criteria; masonry; vaults; complex stress; simulation; https://unistroy.spbstu.ru/article/2016.50.3/ 3_bespalov_50.pdf