In this study, the screw-ribbed reinforcement and grout-type mechanical coupler device were developed to improve the poor constructability and seismic performances of the reinforced concrete columns with splice connections in longitudinal bars reported in existing literatures. The screw-ribbed reinforcements connected by grouted-couplers can maximize the confinement between the sleeve and concrete, and also minimize the inevitable gaps between reinforcements in coupler device. To verify the seismic performances of reinforced concrete columns with proposed mechanical connections, four reinforced concrete columns designed as the intermediate moment resisting frame specified in current code of practice were fabricated and tested, and test results showed that the reinforced concrete column with grouted-sleeve splices can provide the same or more enhanced seismic performances compared to that without splice.

• 이득행(서울시립대학교 건축공학과, 박사과정) | Lee, Deuck Hang
• 황진하(서울시립대학교 건축공학과, 박사과정) | Hwang, Jin Ha
• 김강수(서울시립대학교 건축공학과, 교수) | Kim, Kang Su 교신저자
• 이세정(세진SCM(주), 과장) | Lee, Se Jung
• 양일승(동신대학교 건축공학과, 교수) | Yang, Il Seung