PSI - Issue 72

G. Gusev et al. / Procedia Structural Integrity 72 (2025) 464–469

469

freezing conditions. From the measured data, the system’s natural frequencies and damping ratios were extracted. The experiments revealed how these parameters evolve over time, linked to changes in soil temperature and the freezing process. A notable observation is the significant shift in the system’s lowest natural frequency from about 17 to 31 Hz (about 45% increase) as the soil freezes, accompanied by a reduction in the damping ratio from 0.01 to 0.005. During short thaw periods, the system exhibits a sudden increase in dissipative properties. Acknowledgements The paper was carried out within the framework of the state assignment, registration number of the topic №124040500016 -9. References Ai, Z.Y., Li, Z.X. 2015, Dynamic analysis of a laterally loaded pile in a transversely isotropic multilayered half-space. Engineering Analysis with Boundary Elements 54, 68 – 75 Aksenov, V., Gevorkyan, S., Iospa, A., Krivov, D., Shmelev, I., Spiridonov, S., 2014, Performance characteristics of boring piles in Frozen Soils. Soil Mechanics and Foundation Engineering 51(4), 204 – 211 Chen, G.S., Davis, D., Hulsey, J.L., 2012, Measurement of frozen soil – pile dynamic properties: A system identification approach. Cold Regions Science and Technology 70, 98 – 106 Cui, C., Liang, Z., Xu, C., Xin,Yu., Wang, B., 2023 Analytical solution for horizontal vibration of end-bearing single pile in radially heterogeneous saturated soil, Applied Mathematical Modelling 116, 65 – 83 Guan, J., Zhang, X., Chen, X., Ding, M., Wang, W., Yu., S., 2022, Influence of seasonal freezing-thawing soils on seismic performance of high rise cap pile foundation in permafrost regions. Cold Regions Science and Technology 199, 103581 Gusev, G.N., Tsvetkov, R.V., Epin, V.V., 2024 Numerical-Experimental Method of Determination of the Elastic Modulus of a Soil Massif. Mechanics of Solid. 59(6), 3390 – 3396 Kolesnikov, Y. I., Fedin, К. V., Ngomayezwe, L., 2021 , On the influence of seasonal changes in the resonant properties of surface soils on seismic safety of structures. Journal of Applied Geophysics 193, 104412 Gao, L., Wang, K., Wu, J., Xiao, S., Wang, N., 2017, Analytical solution for the dynamic response of a pile with a variable-section interface in low-strain integrity testing. Journal of Sound and Vibration 395, 328 – 340 Liu K., Zhang Z., 2021, Dynamic Response of an Inhomogeneous Elastic Pile in a Multilayered Saturated Soil to Transient Torsional Load. Mathematical Problems in Engineering 3, 1 – 13 Lü, S., Wang, K., Wu, W., Leo, C.J., 2014, Longitudinal vibration of a pile embedded in layered soil considering the transverse inertia effect of pile. Computers and Geotechnics 62, 90 – 99 Ma, J., Han, S., Gao, X., Li, D., Guo, Y., Liu, Q., 2022, Dynamic Lateral Response of the Partially-Embedded Single Piles in Layered Soil. Applied Science 12, 1504 Wu, W., Yang, Z., Liu, X., Zhang, Y., Liu, H., Naggar, MH El., Xu, M., Mei, G., 2022, Horizontal dynamic response of pile in unsaturated soil considering its construction disturbance effect. Ocean Engineering 245, 110483 Xiao, F., Chen, G.S., Hulsey, J.L., Davis, F., Yang, Z., 2018, Characterization of the viscoelastic effects of thawed frozen soil on pile by measurement of free response. Cold Regions Science and Technology 145, 229 – 236 Yang, Z., Shen, F., Yin, F., Tang, X., Wen, W., Li, Y., 2023, A new approach for improving lateral performance of pile foundations in seasonally frozen regions. Cold Regions Science and Technology 207, 103778