DOI: 10.37153/2618-9283-2022-6-71-76

Authors:  
Rubric:     Seismic safety in city planning   
Key words: seismicity, foundations, seismic microdistricting, risk management
Annotation:
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. Used Books:

1. Decree of the Government of the Russian Federation. No. 365 of 23.04.2009. (In Russian)

2. Decree of the Government of the Russian Federation of December 30, 2017 No. 1710 "On approval of the State Program of the Russian Federation "Provision of affordable and comfortable housing and communal services to citizens of the Russian Federation"                (with amendments and additions). (In Russian)

3. Resolution of the Government of the Russian Federation. No. 1 of January 6, 2006.          (In Russian)

4. SP 14.13330.2018. A set of rules. Construction in seismic areas. Updated version of SNiP II-7-81* (approved and put into effect by the Order of the Ministry of Construction of Russia dated 24.05.2018 N 309/pr). 50 p. (In Russian)

5. Order of Rosstroy dated 02.07.2007 No. 188 "On the requirements for the composition, content and procedure for issuing the conclusion of the State examination of project documentation and engineering survey results" (Registered with the Ministry of Justice of the Russian Federation on 16.07.2007 No. 9853). (In Russian)

6. RSN 60-86 Engineering surveys for construction. Seismic microdistricting. Norms of work production. Gosstroy RSFSR. M.: Mostsgisiz Gosstroy RSFSR. 1986. 32 p. (In Russian)

7. RSN 65-87 Engineering surveys for construction. Seismic microdistricting. Technical requirements for the production of works. Gosstroy RSFSR. M.: MosSGISIZ Gosstroy RSFSR. 1987. 20 p. (In Russian)

8. Methodology of seismic microdistricting of built-up (developed) territories of the RSFSR, taking into account regional engineering and seismological features and technogenic factors. Goskomarchstroy of the RSFSR, scientific and production association "Stroyiziskaniya". M. 1991. 23 p. (In Russian)

9. Molokov L.A. Interaction of engineering structures with the geological environment. M.: Nedra. 1988. 222 p. (In Russian)

10. Abi J. Earthquakes. M.: Nedra. 1982. 264 p. (In Russian)

11. Morozov V.V., Sharapov V.G. Report on seismic microdistricting of Grozny. Pyatigorsk, 1985. (In Russian)

12. Golubtsova M.N., Shechter O.Ya. The influence of changes in soil properties at the base of the structure during the propagation of vibrations on the surface of the layer. Scientific works of NIIOSP. Issue 80. Moscow: SI. 1980, pp. 97 – 106. (In Russian)

13. Ilyichev V.A., Kurdyuk A.Yu., Likhovtsev V.I. Evaluation of the effect of artificial preparation of the base on the intensity and spectral composition of seismic vibrations. Foundations and foundations under static and dynamic loading conditions. Proceedings of the NIIOSP. Issue 86. Moscow: PEM Gosstroy of the USSR. 1986, pp 103 –113. (In Russian)

14. Ilyichev V.A., Kurdyuk A.Yu., Likhovtsev V.I. Methodology for assessing the influence of artificial foundations on the intensity and spectral composition of seismic vibrations. Foundations, foundations and mechanics of soils.1992, No. 6, pp. 28 – 30. (In Russian)

15. Seismic risk and engineering solutions. Edited by C. Lomnitz, E. Rosenblut. M.: Nedra. 1981. (In Russian)

16. Assessment of the influence of ground conditions on seismic hazard. Methodological guide to seismic microdistricting. Moscow: Nauka.1988. (In Russian)