PSI - Issue 72

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ScienceDirect

Procedia Structural Integrity 72 (2025) 464–469

Keywords: pile; frozen soil; Fourier spectrum; damping ratio 1. Introduction Climate change and global warming are causing an increase in the average air temperature on Earth. These processes occur most rapidly in the Arctic, leading to the degradation of permafrost. Changes in the mechanical properties of frozen soils that support the foundations of engineering structures affect safety and cause damage to facilities. Similar problems in the operation of structures can also occur in mid-latitude regions, where the soil periodically freezes and thaws seasonally. The influence of seasonal changes in the resonant properties of surface soils on structural seismic safety has been noted, for example, in the article by Kolesnikov et al. (2021). Abstract This paper is devoted to the study of the dynamic parameters of the pile – soil system, which is a main part of the most common foundation type used under conditions of seasonal soil freezing-thawing. At temperatures above zero degrees Celsius, a single screw pile was installed in the soil. A weight is attached to the head of the pile. Also located on the pile are the accelerometer, actuator, and temperature sensors. During the autumn – winter period, the experiments was carried out when the ground was frozen. In these experiments, the pile’s response to impact -induced vibrational excitations from the actuator and to natural background vibrations was measured, and the soil and air temperatures were also recorded. The measurements showed that when the soil freezes, there is a significant change in the system’s natural frequencies and damping ratio. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 12th Annual Conference of Society for Structural Integrity and Life (DIVK12) Change of dynamic properties of the pile-soil system during freezing G. Gusev a , V. Yepin a , R. Tsvetkov a, * a Institute of Continuous Media Mechanics Russian Academy of Science, 1,Koroleva str., Perm, 614013,Russia

* Corresponding author. Tel.: +7-342-237-8330; fax: +7-342-237-8487. E-mail address : flower@icmm.ru

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 10.1016/j.prostr.2025.08.128