<p>This study numerically investigates the long-term consolidation settlement behavior of pile-raft foundations (PRFs) on soft clay, incorporating the influence of strain rate effects. The proposed prediction method accurately estimates both the immediate settlement under loading and the long-term consolidation settlement of PRFs, with simulation results validated against long-term settlement data from high-rise buildings. This investigation reveals that higher strain rate reduce long-term consolidation settlement. Post-loading, the relative shear stress distribution at the pile-soil interface exhibits a time-dependent evolution, the upper pile segment shows a gradual decrease, while the lower segment experiences an increase. Additionally, the axial force in piles grows over time, though higher strain rate significantly reduces its peak magnitude. For the raft, bending moment distribution intensifies at lower strain rate. Compared to the peak bending moment immediately after loading, the peak bending moment increases by 1.0 times for a 1.5&#xa0;m thick raft, and by 1.42 times for a 1&#xa0;m thick raft. A notable tendency for raft-soil separation is identified, attributed to differential settlement rates between the PRFs and surrounding soil.</p>