Piled raft foundations (PRFs) are effective and notable engineering solutions used in construction projects to support tall buildings and substantial structures, especially in earthquake-prone areas. These foundations significantly impact total and differential settlement, enhancing structural stability. Although PRFs are widely used, their response has predominantly focused on unidirectional ground motion, often neglecting the bidirectional nature of earthquake forces. This study aims to fill that gap by using Finite Element Analysis (FEA) to examine the dynamic response of PRFs under bidirectional earthquake motions, by systematically varying parameters such as soil-structure interaction, natural period, and peak ground acceleration (PGA). A three-dimensional (3D) numerical analysis of PRF embedded in the sand is done, considering short-period and long-period superstructures. Soil is modeled as a 3D continuum using the hardening soil model with small-strain stiffness (HS small) constitutive model. The pile and raft are represented as three-dimensional solid and plate elements, respectively, while the superstructure is simulated as a beam element with a lumped mass at the top. A real-time history of seismic motion is used, which includes both unidirectional and bidirectional seismic analyses. Critical response parameters such as shear force and bending moment in the piled raft are compared, and design implications are suggested based on the findings.