Abstract: Improving seismic resilience of buildings is the core task of seismic mitigation in current engineering community. The resilience of reinforced concrete (RC) frames designed according to modern codes is not clear despite their high collapse margin ratios. Existing studies quantifying resilience have used only the seismic responses of structural components as input, ignoring the influence of nonstructural components on seismic responses of the global structure. In response to the aforementioned issues, a 6-story RC frame office building is designed according to the minimum requirements of the codes and its seismic resilience is evaluated, so that the gap between the actual resilience of office building and the resilience targets suggested in the Standard for Seismic Resilience Assessment of Buildings is clarified, and the influence of various types of components on structural resilience is also revealed. The effect of mechanical contribution of infill walls on the seismic resilience of the office building is comparatively studied. The results show that the repair cost of this 6-story frame office building mainly comes from infill walls and HVAC-type equipment, while the repair time mainly consists of repair time of structural components and infill walls. The infill wall participation increases the seismic resilience of the office building and reduces the repair cost and time of drift-sensitive components by about 50%, but has less effect on acceleration- sensitive components.