CONSTRUCTION OF ACCELEROGRAMS OF STRONG EARTHQUAKES FOR THE INTERNAL LAYERS OF A ROCK MASSIF WITH ANISOTROPIC STRUCTURE

Abstract

This article presents algorithms for generating synthetic accelerograms of strong earthquakes for both the free surface and the internal layers of an anisotropic rock mass. The authors propose a mathematical model based on a non-stationary multiplicative random process that takes into account the macroseismic parameters of the region and the spectral composition of ground motion. Using Kanai's semi-analytical method, a methodology for determining layer-by-layer accelerations in a multilayer medium, taking into account the reflection and refraction of seismic waves, is developed. Particular attention is paid to calculating the velocities of quasi-P and quasi-S waves in inclined transtropic rock masses, which is critical for assessing the seismic resistance of underground structures and hydraulic dams.