Abstract
The main issues of evaluating the efficiency of use of the seismic isolation systems as a reliable means of seismic protection of buildings and structures in seismically hazardous regions have been analysed. Specific characteristics of the most common types of seismic isolation in case of seismic load considered. It is shown that these protection systems are now becoming more common, without their respective justification. In this regard, there is a need to develop special recommendations for the use of seismic insulation in the construction of buildings and structures for various purposes. At the same time, special attention is paid to the effective conFigureuration of seismic isolation and the role of damping in it. The possibility of application of the considered protection should include: an assessment of the seismological situation of the construction area, technical and economic analysis of the choice of the type of seismic insulators, a complex of computational, theoretical and experimental studies.
Highlights
IntroductionThe idea of using seismic isolation known since ancient times
Seismic isolation is usually understood as a system for reducing the energy impact on a structure during seismic vibrations by installing elements of increased elasticity that make it possible to tune the response spectrum of the building away from the impact spectrum in the long period range [1, 2].The idea of using seismic isolation known since ancient times
When making a decision re: the choice of seismic isolation parameters, it is desirable to have a frequency forecast of earthquakes
Summary
The idea of using seismic isolation known since ancient times. Due to the nonlinear response of these materials, the seismic vibrations of such facilities during earthquakes significantly decreased [3]. Despite the simplicity and affordability of the engineering implementation, the idea of seismic isolation was not widespread for a long time. Since the mid-1950s, the common approach was to replace the static method of structural engineering by the spectral one for evaluation of seismic effect. In accordance with the spectral calculation method adopted in regulatory documents, the formula for determining the seismic load included the dynamic response factor β [4, 5], which depended on the natural period of vibrations of the structure (T).
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