Assessment of seismic wave propagation in the “soil-structure” system of reinforced-concrete buildings based on the HVSR method

The scientific novelty of this study lies in the comprehensive characterization and quantitative assessment of the dynamic response of soil-structure systems in reinforced-concrete multistory buildings in the Olmazor district of Tashkent City using the (HVSR) technique. Unlike conventional site-response investigations, microseismic vibrations were systematically recorded at multiple levels, including the ground surface, foundation level, and individual floors throughout the building height. These measurements enabled the determination of the fundamental resonance frequency (f o ) and the HVSR amplification factor (Ahvsr), providing a basis for evaluating the dynamic interaction between the foundation, soil, and superstructure.The vertical distribution of seismic energy within the buildings was quantitatively assessed using normalized energy indices (E n and Enorm), while the variation of vibration amplitudes with increasing elevation was systematically characterized. The results revealed a pronounced amplification of seismic energy toward the upper floors, indicating an increased potential for resonance effects at greater elevations. Furthermore, a clear relationship was established between the dynamic properties of the underlying soil and the natural vibration characteristics of the buildings, demonstrating the significant influence of local site conditions on structural seismic response.Based on these findings, an integrated approach for assessing the seismic stability and dynamic response of soil-structure systems was developed.

Hali tarjima qilinmagan