## 3 Analysis of Slope Model Test Results
### Wooden Frame Beam Bending Moment Analysis  
The bending moments at various measuring points of the frame beams under different loading frequencies are illustrated in Figure 21. For the horizontal frame beams subjected to top loading, the lower sections of measuring points H1, H3, H5, and H7 are under tension,  
Figure 20: Anchor bending moment with different peak differences.  
indicating positive bending moments, while the upper sections of measuring points H2, H4, and H6 are under tension, indicating negative bending moments. As the frequency increases, the bending moments at each measuring point gradually increase, with larger amplitudes at higher frequencies.  
Regarding the vertical frame beams under loading, the lower sections of segments S4-S7 are under tension, indicating positive bending moments, whereas the upper sections of segments S1-S4 are under tension, indicating negative bending moments. With the frequency increase, segment S5 exhibits a significant increase in bending moment, reaching the maximum, while segments S2, S4, and S6 show slight increases in bending moments, and the remaining measuring points remain relatively stable.  
Comparing the two diagrams, both horizontal and vertical frame beams exhibit an alternating pattern of tension in bending moments. The bending moments of the horizontal beams are more affected by the loading compared to the vertical beams.  
The bending moments at various measuring points of the frame beams under different upper and lower peak values of loading are illustrated in Figure 22. The overall bending moments exhibit an alternating pattern of tension, resembling a wave-like shape. With the increase in upper and lower peak values, except for H3, the bending moments at the remaining measuring points significantly increased. The bending moments at the sides of the beam are relatively smaller and show less variation.  
Figure 21: Bending moments of frame beams with different loading frequencies. (**a**) Cross beam; (**b**) vertical beam.  
Figure 22: Different upper and lower peak frame beam bending moments. (**a**) Cross beam; (**b**) vertical beam.  
For the vertical frame beams under loading, the lower sections of segments S4-S7 are under tension, indicating positive bending moments, while the upper sections of segments S1-S4 are under tension, indicating negative bending moments. With the increase in upper and lower peak values, the bending moments at each measuring point notably increase.  
The bending moments at various measuring points of the frame beams under different upper peak values of loading are illustrated in Figure 23. Under the loading conditions, the lower parts of the horizontal beam at points H1, H3, H5, and H7 are under tension, while the upper parts at points H2, H4, and H6 are also under tension. With the increase in upper peak values, there is a significant increase in bending moments at points H3, H4, and H6, while the bending moments at points H1, H2, and H7 decrease. For the vertical beam, the lower sections of segments S4-S7 are under tension, and the upper sections of segments S1-S4 are under tension. The change in bending moments with the increase in upper peak values is minimal.  
Both the horizontal beam and the vertical beam of the wooden frame beams exhibit a wave-like pattern of alternating tension and compression. This behavior resembles the actual structural bending observed in frame beams in engineering practice. Within the combined system of slope soil, bamboo anchor rods, and frame beams, the frame beams experience a dual compression-tension stress pattern. The horizontal beam mainly experiences bending stress in the middle and anchor head sections, suggesting a need for reinforced support in the midsection for engineering purposes. The vertical beam shows upward tension and outward bending in the upper section, while the lower section experiences downward tension and inward bending toward the slope face. The horizontal beam is notably affected by changes in frequency, upper and lower peak values, and peak value differences.