Urban underground rail systems, while essential for efficient transportation, cause ground-borne noise and vibration that can impact nearby structures and sensitive equipment. This paper presents and compares two novel hybrid modeling methods, PiP-FEA Fictitious Force and PiP-FEA Displacement Field, developed to accurately predict ground-borne vibration in structures by enabling detailed analysis of structures affected by underground railways. Both methods integrate the well-known Pipe-in-Pipe (PiP) model with finite element analysis (FEA) using ANSYS Parametric Design Language (APDL). The PiP-FEA Fictitious Force method applies forces derived from PiP simulations directly into the soil in an FEA model, capturing detailed wave propagation and resonance effects. The PiP-FEA Displacement Field method applies PiP-derived displacements at a horizontal plane at a certain soil depth as a displacement boundary condition, thereby reducing computational effort by modeling only the upper soil layers. Both methods are benchmarked against the extended PiP model where good results are obtained for vibration evaluation.