Non‐Linear Model for Dynamic Axial Pile Response

This paper presents a nonlinear model for the analysis of axial, dynamic response of single piles and pile groups. The model accunts for the nonlinear behavior of the soil adjacent to the pile and under its tip as well as the relative movement between the pile and soil; the loss of energy through the soil medium due to radiation, hysteretic, and material damping and the rate effects is accounted for. The study found that the displacement and velocity time histories as well as pile capacities computed using he proposed model compare favorably with field-measured data. The paper describes different applications that show the suitability of the model for pile driving analysis, the production of equivalent stiffness and damping parameters to be implemented in superstructure response to vertical loading, and the generation of the dynamic t-z curves.