Time Domain Axial Response of Dynamically Loaded Single Piles

TLDR

The study develops a time‑domain procedure for analyzing axial response of single piles. The authors formulate a time‑domain soil‑pile interaction force from a mechanical idealization of the soil, construct a transfer matrix treating the pile shaft as a continuous beam, and compute pile response under harmonic and transient loading. Comparison with a frequency‑domain analysis confirms the accuracy of the time‑domain procedure.

Abstract

A procedure for the time domain analysis of axial single pile response is developed. A time domain soil‐pile interaction force is formulated through a simple mechanical idealization of the soil medium, developed from the dynamic behavior of a plane strain continuous elastic medium. A transfer matrix is formulated in the time domain treating the pile shaft as a continuous beam. The response of single piles subjected to harmonic excitation is calculated using both the current time domain analysis procedure and a previously published frequency domain analysis procedure. The comparison between the two results verify the current procedure developed for time domain analysis. Numerical examples are provided for single piles subjected to transient loading.