Analysis of dynamic response law and time-frequency characteristics of high cut slope under the action of earthquake

• Main Authors: Honghua Jin, Linfeng Wang, Qingyang Ren, Xingxing Zhang
• Format: Article
• Language: English
• Published: JVE International 2021-02-01
• Series: Journal of Vibroengineering
• Subjects: high cut slope; the action of earthquake; dynamic response law,·time-frequency characteristics
• Online Access: https://www.jvejournals.com/article/21764
• ISSN: 1392-8716; 2538-8460

This study aimed to reveal the dynamic response law and time-frequency characteristics of the slope under the action of earthquake. Based on an actual project in earthquake area, the stability of the slope under natural and seismic conditions was calculated and the meso parameters of rock and soil were obtained by indoor rock and soil specimen parameter test firstly. Meanwhile, a three-dimensional particle flow model of the high-cut slope was established by the three-dimensional particle flow software PFC3D. Then, the law of dynamic response of the slope acceleration was obtained by inputting the horizontal wave of 2008 Wenchuan earthquake. Furthermore, MATLAB programming was used to analyze the time-history signal of acceleration of the slope, and finally the time-frequency characteristics of the high cut slope under the action of earthquake were studied. The results show that the dynamic response characteristics of soil particles in horizontal and vertical directions show surface-tending effect and elevation amplification effect respectively under the action of earthquake. The analysis of time-frequency characteristics showed that the Fourier dominant frequency of soil particles is distributed between 0-5 Hz under the action of earthquake, the low frequency band (0-15.625 Hz) accounts for as high as 88.07 %, and the high frequency band (125-250 Hz) accounts for as low as 0.34 %.