The influence of seismic frequency spectrum on the instability of loess slope.

11 analyzed the acceleration and displacement response of the slope model under different frequency spectrum seismic waves, and showed that when the input seismic wave characteristic period is greater than 0.65 s, the slope displacement response increases significantly, and the PGA amplification factor of the slope shows an increasing trend.

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Under the power input with an excellent frequency of 8–10 Hz, the part of the Fourier spectrum at 8–10 Hz shows a decreasing trend with the distance from the bottom surface, which further shows that the input wave frequency spectrum has a significant influence on the instability and damage of the loess slope.

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