Dynamic Response of a Novel Anchor‐Pile for Slope Stabilization

ABSTRACT A novel anchor‐pile for slope stabilization, composed of the flexible anchor cable and rigid frame pile, is proposed to achieve a combination of high load‐bearing capacity and flexible deformation. This composite retaining structure has been increasingly applied in seismic areas, yet its dynamic calculation method has not been proposed. In this study, based on the dynamic interaction between the anchor‐pile and the surrounding geomaterials, the soil around the frame piles is simplified as an elastic Winkler foundation. A dynamic calculation model for the anchor‐pile is then established through D'Alembert's principle and the sign function. The dynamic equilibrium equations describing the segmental cooperative load‐bearing behavior of the anchor cables, frame pile, and geomaterials are derived, and these equations were solved using the finite difference method. Finally, the proposed method was applied to a case study and compared with the results of a large‐scale shaking table test. The maximum difference in displacement was 14.81%, showing good agreement between the two and demonstrating the reliability of the proposed method. The analysis indicates that under seismic reciprocating motion, the movement patterns of the anchor‐pile toward the outside and inside of the slope are asymmetric. The maximum displacement and maximum bending moment during outward movement are significantly greater than those during inward movement, with differences of 44.90% and 28.57%, respectively. The findings of this study offer a theoretical basis for the dynamic analysis and seismic design of the novel anchor‐pile.