To control the failure mechanism and seismic performance of reinforced concrete (RC) frame structures,our proposed system used ultra-high-strength (UHS) reinforcement in a column and had the option of using fiber-reinforced concrete (FRC) in a frame where damage is expected to occur.Disaster investigations revealed that reinforced concrete frame structures account for a high proportion of buildings destroyed.The use of UHS reinforcement was expected to result in only minimal residual deformations and a low degree of hysteretic energy dissipation.FRC was expected to facilitate hysteretic energy dissipation and increase the system's damage tolerance.Using nonlinear time history analysis,we investigated three frame structures using ABAQUS finite element software,a large universal finite element software widely used in the nonlinear analysis of RC structures.In particular,we used the concrete-damaged plasticity model,which is one of the most important concrete constitutive models in ABAQUS.Based on our analysis results,we discussed the seismic behavior of structures at different seismic intensities.To determine the seismic capacity of each structure,we selected the following parameters: maximum deformation,story drift,residual deformation,and energy dissipation.We found that the use of UHS reinforcement provided the system with relatively greater resistance against lateral seismic loads and resulted in less residual deformation while preventing the critical column from yielding until the drift reached 3%~4%.Thus,UHS frames should be used in columns designed for a "strong column-weak beam" failure mechanism.As the drift increased,differences in residual deformation between specimens decreased.These research results suggest that the proposed system may be promising for improving the damage tolerance of structures in seismic regions.