PROCESS OF SEISMIC MICROZONING Russian patent published in 1998 - IPC

FIELD: structural seismology, evaluation of intensity of vibrations with due account of properties of soils making up construction site. SUBSTANCE: seismic vibrations are excited in soil by vibration source, are registered by geophones located on sections with different engineering-geological conditions and vibration spectra are plotted. Maximum amplitudes of spectra and weighted mean frequencies of tested and standard soils are measures, nonlinear-elastic increments of vibration force are found from relation ΔI = 3lgA_i• f_wi / A_o• f_wo,, where A_i is maximum amplitude of spectrum of vibrations of tested soil; A_o is maximum amplitude of spectrum of vibrations of standard soil; f_wi is weighted mean frequency of vibrations of tested soil; f_wo is weighted mean frequency of vibrations of standard soil. Degree of seismic effect is evaluated by values of nonlinear elastic increments of vibration force. EFFECT: improved authenticity of process. 2 tbl