Andrey Yu. Kurdyuk
candidate
of Technical Sciences, associate professor of the Institute of urban planning,
of Astrakhan State Technical University. Astrakhan, Russian Federation
Publications
In recent years, new risks in areas of intensive
development – geodynamic phenomena and processes of various types and scales
with negative environmental and socio-economic consequences - have become an
urgent topic for scientists and engineers. It is believed that these processes
occur mainly in mobile (orogenic) regions. The most dangerous are induced
earthquakes due to the course of man-made processes, which in turn are a source
of geodynamic risk. These conditions have also developed on the territory of
the Lower Volga region and the Northern Caspian Sea, where the bases are mostly
composed of soils of the third category in terms of seismic properties, which,
in turn, being surface deposits, increase the intensity of the incoming impact.
Currently, these seismic safety factors are not taken into account when
designing buildings and structures in the city and in the region as a whole.
Weak water-saturated soils of the bases and an extensive picture of the
lithological composition are able to change the intensity and spectral
composition of the seismic impact. The current approach to assessing the
seismic hazard in the country is based on the assumption of the influence of
soils on the territory, in its area many times larger than the built-up area.
Nevertheless, surveys of destructive earthquakes, as well as scientific work and
research by some researchers, clearly prove the influence of soils of small
territories on the intensity and spectral composition of seismic vibrations.
Risks can be managed by knowing the seismic properties of the foundation, as
well as determining the dynamic parameters of existing buildings and
structures, i.e. not only to implement the design and construction of
earthquake-resistant buildings and structures, but also to carry out a complex
of work on the examination, design and reinforcement of existing buildings and
structures in order to prevent their destruction.