The Cumulative Damage Evolution Law Of Multi-Anchor Circular Piles Reinforced Landslide Under Earthquake Action

To study the cumulative damage evolution law of multi-anchor circular piles (MACP) under earthquake action, data such as acceleration and axial force of anchor cables of MACP were obtained by shaking table tests. An index of plastic effect coefficient (PEC) was proposed to quantitatively analyze the damage degree of MACP. The influence of multi-factor coupling on the cumulative damage evolution law of MACP was clarified. A landslide deformation prediction method with the axial force of anchor cable as a monitoring index was established. The results confirmed that PEC fully considered the plastic deformation characteristics of concrete materials and was more effective than the pile peak displacement (PPD) in evaluating the seismic cumulative damage effect of MACP. The cumulative damage of MACP was a result of multi-factor coupling, and multiple earthquakes led to a nonlinear increase in the damage degree of MACP. The axial force-ground motion intensity curve of the anchor cable was similar to the landslide deformation curve. The use of the axial force of the anchor cable to predict the deformation of MACP-reinforced landslides was recommended based on the idea of monitoring landslide deformation by Newton force.