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为了研究近表面植玄武岩纤维(BFRP)筋与外包BFRP布的复合快速修复震损钢筋混凝土圆柱的抗震性能,在4~5d内完成了4根震损圆柱的修复,然后对其进行低周往复荷载试验,得到了各试件在不同BFRP植筋率和BFRP布体积率组合的复合修复方案下的抗震性能指标。在试验数据的基础上分析对比了修复后试件与原试件的延性性能、耗能能力、承载力及刚度退化情况。分析结果表明:经过快速修复工艺修复的4根震损试件,其延性和耗能能力均能恢复到原试件的水平;4根试件的承载力相比原试件均有不同程度的提高。此外,4根试件的刚度基本恢复到原试件的水平,试件屈服后承载力随位移的增大明显增加,试件存在明显的屈服后刚度。试件屈服后刚度与BFRP筋及BFRP布的用量有直接关系,当BFRP布的体积率与BFRP筋的植筋率的比值λ在1.80~1.92范围内,试件可以较好地获得屈服后刚度,有效减小残余位移。
In order to study the seismic performance of reinforced concrete columns rapidly repaired by complex surface repair basalt fiber (BFRP) and outsourced BFRP cloth, four damaged cylindrical repairs were completed in 4 ~ 5 days and then subjected to low-cycle reciprocation Load test, the anti-seismic performance index of each test piece under the composite repair scheme of different BFRP planting rate and BFRP cloth volume ratio was obtained. On the basis of the experimental data, the ductility, energy dissipation capacity, bearing capacity and stiffness degradation of the repaired specimen and the original specimen were analyzed and compared. The results show that the ductility and energy dissipation capacity of the four damaged specimens repaired by the rapid repair process can all be restored to the level of the original specimens. The bearing capacity of the four specimens is different from that of the original specimens improve. In addition, the stiffness of the four specimens basically restored to the level of the original specimen, the bearing capacity of the specimen after yield increased obviously with the increase of displacement, and the specimen showed obvious post-yield stiffness. The post-yield stiffness of the specimens is directly related to the amount of BFRP and BFRP fabrics. When the ratio λ of the volume fraction of BFRP cloth to the reinforcement ratio of BFRP tendon is in the range of 1.80-1.92, the specimens can obtain the post-yield stiffness , Effectively reduce the residual displacement.