Abstract
When reinforced concrete columns are damaged during a severe earthquake, the columns are immediately repaired to ensure temporal structural safety for aftershocks. To develop a method to evaluate the seismic performance and dynamic behavior of such repaired columns, analytical investigations for a reinforced concrete column specimen repaired with epoxy resin mortar for earthquake damage were conducted. For analyses of a repaired column, using 67% of the initial elastic modulus and 120% of the yield strength of longitudinal reinforcement improves the accuracy of the analysis. Dynamic analyses demonstrated that the response displacement may increase by the earthquake damage and repairing, depending on dynamic properties of the structure and the ground motion.
