The objective of this research is to investigate the seismic performance of square reinforced concrete bridge piers with solid and hollow cross section. Test specimens were nonseismically designed with the aspect ratio 4.5 Two reinforced concrete columns were tested under constant axial load while subjected to lateral load reversals with increasing drift levels.

• 고성현(제주국제대학교 토목공학과 조교수, 공학박사) | Ko, Seong Hyun