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Structural Engineering and Mechanics Volume 73, Number 5, March10 2020 , pages 543-554 DOI: https://doi.org/10.12989/sem.2020.73.5.543 |
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Seismic performance of RC columns with full resistance spot welding stirrups |
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Yunlong Yu, Zhaohui Dang, Yong Yang, Yang Chen and Hui Li
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| Abstract | ||
| This paper aims to investigate the seismic performance of RC short columns and long columns with welding stirrups. Through the low-cyclic horizontal loading test of specimens, the seismic performance indexes such as failure modes, hysteretic curve, skeleton curve, ductility, energy dissipation capacity, stiffness degradation and strength degradation were emphatically analyzed. Furthermore, the effects of shear span ratio, stirrups ratio and axial compression ratio on the performance of specimens were studied. The results showed that the seismic performance of the RC short columns with welding stirrups were basically the same as that of the RC short columns with traditional stirrups, but the seismic performance of RC long columns with welding stirrups was better than that of RC long columns with traditional stirrups. The seismic performance of RC short columns and long columns with welding stirrups could be improved by increasing stirrup ratio and shear span ratio and reducing axial pressure ratio. Moreover, the welding stirrup have the advantages of steel saving, industrialization and standardization production, convenient construction, and reducing time, which indicated that the welding stirrups could be applied in practical engineering. | ||
| Key Words | ||
| welding stirrups; reinforced concrete; short column; long column; seismic performance | ||
| Address | ||
| Yunlong Yu, Zhaohui Dang, Yong Yang, Yang Chen and Hui Li: School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi 710055, China Yunlong Yu: Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT) | ||