The deployment of ductile fiber-reinforced concrete within the plastic hinge regions of structural components has garnered increasing research interest to improve the seismic resiliency of structures. While experimental and numerical studies appear promising in reducing component-level damage and system-level collapse, accurate nonlinear analysis tools capable of accounting for the unique axial-flexural behavior of HPFRCC components are needed. In this study, 180 high-fidelity numerical models are simulated and analyzed to calibrate new plastic hinge length expressions. The newly developed expressions are validated against the inelastic response of 47 experimental components. The results of this study elucidate the influence of axial load on the plastic hinge length of HPFRCC components and improve the accuracy of plastic hinge length expressions allowing for more accurate system-level modeling.