Centrifugal Vibration Test Analysis of Seismic Response Laws of Prestressed Rock Mass

Abstract:

In order to clarify the response patterns of the anchored slope under the variation of seismic acceleration and the specific response process of the anchor cable under the action of earthquakes, by using the centrifugal vibration test equipment configured by the China Water Resources and Hydropower Research Institute, centrifugal model tests were carried out to study the displacement change process of the anchored slope under the action of harmonic seismic waves, as well as the strain response process and patterns of different positions of the anchor cable and different points of the same anchor cable under the action of earthquakes. The research results show that the oscillation frequency of the vertical displacement of the slope and the strain value of the anchor cable is in good synchronization with the input seismic acceleration frequency; the strain and force of the anchor cable show a decreasing state from top to bottom, and the anchor cables near the sliding surface need to play a greater reinforcing role. With the increase of seismic intensity, the anchor cable plays a greater reinforcing role, and also demonstrates the passive support function of the anchor cable. This test obtained the analysis of the displacement and response patterns of the slope and anchor cables under the action of earthquakes for the anchored slope, and also verified the strong applicability of the centrifugal model test for the research of such problems.