A study on effectiveness of high ductility aseismic joint spliced pile foundation subjected to strong earthquake motions

We performed dynamic response analyses to investigate the effectiveness of the High Ductility Aseismic Joint (HDAJ) spliced pile subjected to strong earthquake motion by using nonlinear FEM. The nonlinear characteristics of the pile and HDAJ spliced pile were assumed to be hyperbolic curves based on the bending tests of the piles. We analyzed three superstructure-pile foundation-ground dynamic interaction models. From the analyses, we found that the maximum response displacements of HDAJ spliced piles were not larger than those of ordinary PHC piles. Besides, the maximum bending moment induced in piles were remarkably reduced by introducing the HDAJ which implied that the HDAJ increased the safety of pile foundation system by far.