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Fasihi H, Ahmadi R A, Alizada A. Seismic protection of structures by rubber-soil mixture as geotechnical seismic isolation. JOTS 2024; 2 (2) :149-165
URL: http://jots.knu.edu.af/article-1-42-en.html

In this article, geotechnical seismic isolation is studied with the help of finite difference numerical modeling. This work is done by placing a layer of rubber-soil mixture with more damping properties than normal soils under the foundation of the structure. The results of complete dynamic analyze showed that this method can be an effective solution to reduce the amount of acceleration transferred to the structure. The results of complete dynamic analyze showed that this method can be an effective solution to reduce the amplification transferred to the structure. The analyzes showed that the higher the thickness of the damping layer, the higher the deamplification will be. The deamplification value for two different earthquakes used in this research was observed to be almost the same. Also, the analysis of the direct soil structure interaction showed that in the maximum range of earthquake input acceleration from 0.1g to 0.6g, the use of a damping layer leads to a reduction of 1.4 to 1.9 times the amount of drift on the floor.