In this study, the behavior of column rebar in non-reinforced specimens (BF) was evaluated as part of the development of seismic retrofitting systems for public buildings such as school buildings. This is a very useful work because it can show the deformation state of the main bars according to the hysteretic behavior of lateral loads. When yielding the specimen, the main bar was yielded. and the deformation of stirrup at the inflection point position hardly occurred. These results will be used as a key index to evaluate the yield state of the structure from the deformation comparison of the reinforced specimens.

• 이현호(동양대학교 건축소방행정학과 교수) | Lee, Hyun-Ho Corresponding author