| Title |
Ductility Improvement of Square RC Columns by Using Continuous Spiral Stirrup |
| Authors |
조경훈(Cho, Kyung Hun) ; 이태희(Lee, Tae Hee) ; 이정빈(Lee, Jung Bin) ; 김성보(Kim, Sung Bo) ; 김장호(Kim, Jang Jay Ho) |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.2.0149 |
| Keywords |
RC기둥; 연속횡방향 철근; 연성화; 1축압축 RC column; Spiral rebar; Softening; Uniaxial compression |
| Abstract |
Recently, concerns about natural disasters such as earthquakes, tsunamis and typhoons have increased. As the magnitude and frequency of earthquakes increase, research is needed to prevent structures from collapsing due to earthquake loads. Research is needed to increase the ductility of columns to prevent the collapse of structures. In this study, the ductility improvement of square columns achieved by applying spiral stirrups to square columns. Square columns reinforced with spiral stirrups are more resistant to repetitive loads such as seismic loads than columns reinforced with tie stirrups. Also, the spiral stirrups can apply better confinement to the concrete. In this study, an uniaxial compression test was conducted to evaluate the performance of columns reinforced with spiral stirrups. The results showed that the columns reinforced with spiral stirrups in both the circular and square columns showed higher compressive strength than the columns reinforced with the tie stirrups. In addition, the columns reinforced with spiral stirrups for both the square and circle columns, showed a tendency to endure the load even after the initial cracking and rebar yielding. |