Keywords
Abstract
The article addresses one of the most relevant challenges in modern construction–ensuring the reliability and stability of buildings in seismically hazardous regions while reducing the cost of protective engineering measures. The aim of the study is to perform numerical modeling of the influence of geometric and physical–mechanical parameters of geotechnical seismic isolation on the dynamic response of buildings under seismic loading. The study investigates artificial foundation layers composed of sand, pebble gravel, and crushed stone. The scientific novelty lies in substantiating optimal configurations of artificial foundation layers and identifying patterns of seismic response reduction depending on geomaterial characteristics. The interaction between the foundation and the superstructure was simulated using the finite element method in PLAXIS with an earthquake accelerogram as input motion. The results show that increasing the height and volume of the artificial foundation layer reduces horizontal accelerations by approximately 16% at both the foundation and the top of the building. The use of coarse-grained sand led to a reduction in acceleration of up to 15% and foundation settlement of up to 9%, while reinforcement with two geogrid layers further reduced vibration amplitudes by up to 28%. The findings confirm the effectiveness of artificial foundation layers in improving the stability and reliability of buildings in seismic regions.