Seismic behavior of RC columns strengthened with prestressed steel wires

被引：0
作者：
Deng, Zongcai [1 ]
Li, Hui [1 ]
机构：
[1] Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing
来源：
Deng, Zongcai | 1600年 / Editorial Board of Journal of Basic Science and卷 / 22期
关键词：
Prestressed steel wires; Seismic behavior; Seismic retrofit; Shear bearing capacity; Short columns;
D O I：
10.3969/j.issn.1005-0930.2014.05.010
中图分类号：
学科分类号：
摘要：
In order to research the dynamic properties of the strengthening RC short columns with prestrssed steel wires(PSW), seven RC columns were tested under cyclic load and constant axial. Under low frequency cyclic loading, test phenomena were described. Experimental data are analyzed and compared, and the effects of configuration index of PSW, prestressing level of PSW and axial compression ratio on the seismic behavior are studied. The results show that the seismic performance of the retrofitted specimens could be effectively enhanced, ductility and energy dissipation are improved significantly. The biggest displacement ductility factor and accumulated energy dissipation of the columns strengthened with PSW are 1.87 times and 6.78 times higher respectively than that of the un-strengthened column. The seismic performance of the retrofitted columns can be improved significantly by increasing the configuration index and/or the prestressed level of PSW. If the configuration index of PSW is bigger than 0.119, the prestressed level reaches 0.40, the seismic performance of the retrofitted specimens can be improved effectively when the axial load ratio is lower than 0.3. Based the test results, the calculating formulas of the shear capacity of RC short columns strengthened with PSW were proposed, which may be useful for engineering design and further study.
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页码：941 / 951
页数：10
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