Application of HHT method in dynamic damage identification of reinforced slope soil

Abstract

Compared with Fast Fourier Transform, Wavelet Transform and other methods, the Hilbert-Huang Transform (HHT) method is more suitable for non-stationary signals, which can be used to denoise seismic signals and accurately extract the local instantaneous characteristics of the signals. Currently, the HHT method has been widely recognized in the field of civil engineering structural damage identification. In this paper, the HHT method was introduced into the identification of failure mode of slope soil under ground motion. To verify the feasibility of the proposed approach, large-scale shaking table tests were conducted. The results show that the proposed method is in good agreement with the sliding surface observed in the shaking table test. The dynamic response characteristics of the slope based on the variation in the MSA are consistent with the test results. Moreover, the seismic damage mechanism differences of gravity retaining wall, sheet pile wall and anchored sheet pile wall reinforced slope were discussed. The results provide technical reference for the reasonable protection of slope engineering in seismic zones.