Analysis of the dynamic characteristics of the mixed structure building using mobile seismic station of new generation

Abstract

The article deals with the study of the behavior of buildings and structures in natural conditions. The article is devoted to the study of the dynamic characteristics of a residential building with an incomplete frame. The authors proposed to study the behavior of buildings using a mobile seismic station of a new generation co nsisting of three seismic receivers, such as the upgraded SM-3 seismic sensors, a logger, produced by IGES NAS RA, equipped with a wireless network that provides communication with a laptop. The article presents the results of studies of the dynamic characteristics of a residential building of a composite structure with the help of a special mobile seismic station developed at IGES NAS RA. During the operation of buildings, their technical condition changes. This is expressed by a change in the quantitative characteristics of performance (reliability), in particular, the dynamic characteristics of buildings. We set the task: to study the dynamic characteristics of a residential building with a complex structure and to check its technical condition, to compare the dynamic characteristics with data obtained in earlier works, and also to compare the dynamic characteristics of the grounds of their bases. Measurement of vibrations were carried out with the help of microseisms. In such measurements it is necessary to avoid the influence of the movement of vehicles and other permanent sources of generation of vibrations of soils and buildings. Therefore, measurements were made at night to ensure that the vibrations of the soil and buildings were caused only by natural microseisms. One of the most important advantages of microseismic research is that the number of micropulses recorded on the surface of the Earth and on buildings and structures is extremely large, so it is possible to obtain a large amount of information for spectral analysis in a short time without much expense. This information allows you solving a number of important tasks of a scientific and practical nature. A comparative analysis of the dynamic characteristics of the building obtained by instrumental observations and previously available similar data was carried out. The regularities of changes in the dynamic characteristics depending on the duration of the building’s operation were revealed, as a result of which an assessment of its actual technical condition was made.