Колонка редактора - Eng
Accounting for thermal strains in the monitoring and development of technical solutions for the overhaul of load-bearing walls
UDK: 69.059.22
R.R. Sadykova, I.L. Tonkov
In carrying frameless building brick walls and buildings with incomplete frame during operation for various reasons arise of damage in the form of cracks which affect the performance and durability of the building. Identification of such damage masonry - the process responsible and time-consuming. From the final conclusion depends largely on the alleged rationality of repair measures, their effectiveness and cost. As a result of complex engineering survey of a building with an incomplete skeleton in the city of Perm, external non-reinforced brick walls which damaged numerous through-cracks, as the main causes of damage to the operation of these base uneven deformation in the first years due to insufficient bearing capacity of the soil, and recommended monitoring the technical state. During the eight month of observation it was noticed that the opening width of cracks existing in the outer walls was varied in a larger and smaller side only with the onset of the cold season, particularly as a result of extreme temperatures. At the same time the emergence of new cracks have been recorded, which casts doubt on the effect only of geological factors. According to regulatory documents calculations outer brick wall on temperature effects were produced. Calculations confirmed that from the temperature difference in the masonry walls of buildings surveyed achieved tensile force sufficient for the formation of cracks. Also cracking calculated value coincides with the actual value obtained as a result of building monitoring. The performed studies have shown that the oscillation width of cracks in the masonry is directly related to the change in linear dimensions of each array of masonry, separate adjacent cracks. Accordingly, for preventing the disclosure of significant cracks after repair by injecting it is advisable to carry out an external wall insulation. Thereby not only to improve the insulating properties of the wall, but also decrease multiple oscillation outer surface of the wall temperature and consequently cracks repeated opening width does not exceed the standard values.
Файл: Р.Р. Садыкова, И.Л. Тонков.pdf, 7 pag.
Рубрика: Строительная механика. Моделирование физических процессов строительства. Строительные конструкции зданий и сооружений
Выпуск №7: По материалам VIII Всероссийской молодежной конференции аспирантов, молодых ученых и студентов «СОВРЕМЕННЫЕ ТЕХНОЛОГИИ В СТРОИТЕЛЬСТВЕ. ТЕОРИЯ И ПРАКТИКА», (Часть II ,сентябрь, 2016)
