Abstract
Earthquakes are one of the natural disasters that can cause structural damage to buildings. A well-designed reinforced concrete building structure can increase earthquake resistance. This study aims to analyze the effect of reinforcing steel bar size on the earthquake resistance of reinforced concrete building structures.The analysis method used is dynamic analysis using ETABS software. The results show that larger reinforcing steel bar sizes can increase the earthquake resistance of reinforced concrete building structures.However, it should be noted that increasing the reinforcing steel bar size can also increase construction costs. Therefore, further analysis is needed to determine the optimal reinforcing steel bar size for reinforced concrete building structures.