Dynamic Behavior of Double-Row Pre-stressed Anchor Piles under Earthquake Conditions

摘要

To investigate the seismic performance of the double-row pre-stressed anchor piles(DRPAPs)on the Yuxi-Mengzi railway,FLAC3D was used to construct a three-dimensional model.Using Koyna earthquake records as input motions,dynamic time-history analyses were carried out.In the analyses,we compared earth pressure on the front and back of the piles and deformation of the piles under different seismic forces with or without anchor cables.With the anchor cable present,the earth pressure on the back of the pile's free section increases,but that on the back of the pile's anchorage section decreases.Also,with anchor cables,the earth pressure on the front of the upper pile decreases,and that on the back of the lower pile decreases.