Abstract: In order to simulate the nonlinear hysteretic behavior of a RC structure refinedly, a practical simulation platform FENAP for a reinforced concrete (RC) fiber beam-column element is established, and the corresponding material library with multiple uniaxial constitutive models of steel and concrete is developed. In the platform FENAP, the damage effect of stiffness and strength degradation of members, the multi-dimensional coupling effect of axial forces and bending moments, and the binding effect of stirrups on concrete may be considered effectively. Hysteretic behaviors of a circular steel pier and a rectangular RC cantilever beam are simulated using the platform FENAP and the software OpenSees respectively, and the simulated results are compared and analyzed. The results show that the complex nonlinear behavior of bridge components may be simulated refinedly with high computational efficiency and solution accuracy using the built platform FENAP, which provides a practical analysis tool to simulate the disaster evolution process of large bridges.