DETERMINATION OF THE GROUND VIBRATION WAVELENGTH BY EARTHQUAKEFREQUENCY

Abstract

The study of the earthquake phenomenon has recently been of interest in connection with the increasing
frequency of earthquakes. Seismic microzoning evaluates the influence of local engineering-geological conditions of
a construction site on the parameters that determine the nature of the destruction of buildings and structures under
specific soil conditions. These parameters include the intensity, the form of recording and the spectrum of vibrations
of the upper part of the soil section during possible earthquakes. Since in some cases resonant effects can occur in
soils (significant amplification of oscillations at specific frequencies) even under favorable (in terms of seismic
rigidity) site conditions, the seismic safety of buildings or structures built on it is not guaranteed.In earthquakeresistant
construction, it is necessary to know the magnitude of the intensity of vibrations, the values of maximum
accelerations and the distribution of seismic effects in frequency. The soils on which structures stand affect the
vibrations of these structures. When calculating the structure-foundation oscillatory system for all modes, the
forecast of its resonant frequencies and peak displacement amplitudes, considered as limiting - the most
unfavorable conditions for the operation of the structure, is of great importance. In the spectrum of a seismic
wave, there are fluctuations with frequencies close to the natural frequency of a number of structures, which for
different modes often ranges from fractions to a few hertz (characteristic periods from 0.2 to 2 s). At resonance,
stresses increase at the contact of the foundation with the soil, and in the structure of the structure, the probability
of its destruction increases. For the first time, the formation oscillation is described in the work, the frequency of
oscillations from the wavelength is determined. The equation of oscillation of an elastic body is taken as a basis. The
case of functions periodic in X and an arbitrary variable in height and depth is considered.