Structural seismic resilience is defined as the capability of the object structure to maintain a level of functionality and recover to the original state as soon as possible after an earthquake. Although research on seismic resilience has been widely focused recently, Japan is still in the stage of conceptual application. In this paper, the methodology to conduct seismic resilience assessment suitable for single buildings is summarized and then applied to calculate the seismic resilience indices of two steel frame models with and without braces under the assumption of a simplified recovery model. As the analytical result, braces are confirmed quantitatively as effective structural members that can enhance seismic resilience of main structures.