Experimental and numerical investigation on the seismic response of slope reinforced by frame beam and anchor cable.

A large-scale shaking table test and a series of numerical simulations were performed to clarify the seismic response of the slope reinforced by frame beam and anchor cable by applying Wenchuan-Qingping and El Centro seismic records. The horizontal acceleration responses and response spectrum characteristics of slope, the axial force of anchor cable, and the displacement of frame beam were mainly studied by shaking table test. The influence of the excitation direction of seismic waves was investigated in numerical simulation. The results show that the amplification effects of acceleration and response spectrum along the slope height are independent of the type of earthquake, while the amplification effects of acceleration and response spectrum with excitation amplitude are related to the type of earthquake. There are obvious differences in the acceleration responses between the lower and upper weak sliding layers, and a stronger nonlinear behavior occurs in the upper weak sliding layer, which is explained by the time-frequency spectrum calculated by synchrosqueezing wavelet transform (SWT). The axial force of anchor cable and the peak displacement of frame beam increase with the increases of slope height and excitation amplitude. The dynamic response and damage range of the slope under bi-directional earthquake excitation are significantly larger than that under one-directional earthquake excitation. [ABSTRACT FROM AUTHOR]