Seismic site effects evaluation of the Yagotin compressor station (Ukraine)

Summary A crucial step towards ensuring the seismic resistance of critical facilities and the mitigation of earthquake risks involves the accomplishment of site response studies. The selection of a model of stress-strain state of soil under seismic loads is considered. The paper presents the results of a study of the influence of the sedimentary layer on seismic oscillations on the surface using the example of the territory of the Yagotin compressor station (Ukraine). In the calculations, the equivalent linear ground response analysis to seismic impact was used. The frequency range of the resonant amplification of the soil under the site is determined. The analysis of the influence of the sedimentary layer on the frequency composition of the oscillations of the upper layer is carried out. The study of the site effects allows you to make design decisions that do not allow the frequencies of structures on the site to coincide with the frequencies of the soil amplifying seismic vibrations.