期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 307, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.124731
关键词
Reinforced concrete; Beam-column joints; Reinforcement corrosion; Repairing; Basalt fiber-reinforced polymer; Cyclic loading; Seismic behavior; Accelerating electrochemical corrosion
资金
- National Natural Science Foundation of China [51879092]
- Fundamental Research Funds for Central Universities [2019B52814, KYCX21_0488]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX21_0488]
- Qing Lan Project of Jiangsu Province of China
The study investigated the seismic behavior of corroded beam-column joints repaired with BFRP sheets, finding that the repair effectively improved the seismic performance. The utilization of BFRP sheets delayed concrete spalling and crushing, delayed stirrup buckling, increased load bearing capacity, ultimate displacement, and energy dissipation capacity, and fully recovered stiffness of the corroded joints.
Reinforcement corrosion is one of the main reasons for the deterioration of reinforced concrete (RC) structure. Corroded RC beam-column joint experiences large deformations under the earthquake, which results in the deterioration of the seismic behavior. Although researches on the uncorroded joints strengthened with fiberreinforced polymer (FRP) sheets have been conducted, investigations on the corroded RC beam-column joints repaired with basalt FRP (BFRP) sheets are relatively limited. In present research, seven interior beam-column joints were tested under the cyclic loading, including one reference specimen, three specimens with different corrosion rates, and three corroded specimens repaired with BFRP sheets. The seismic behaviors in terms of crack pattern, failure mode, hysteretic curve, load bearing capacity, deformation capacity, energy dissipation, and stiffness degradation were discussed. Results obtained from the test showed that: (1) the seismic behaviors of corroded beam-column joints were effectively improved by the utilization of BFRP sheets; (2) the spalling, and crushing of concrete, as well as the buckling of stirrups were delayed by the utilization of BFRP sheets; (3) the load bearing capacity, ultimate displacement, and energy dissipation capacity of corroded beam-column joints were effectively increased, and the stiffness was fully recovered to that of uncorroded joint by repairing with BFRP sheets; (4) the bond behavior between corroded bars and concrete or strains of corroded bars in beamcolumn joints were improved or decreased after repairing with BFRP sheets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据