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以3根碳纤维布加固钢筋混凝土柱根部锚固的破坏性试验为基础,分析了在柱截面尺寸及配筋相同的情况下,碳纤维布加固量、锚固长度、柱根部有无CFRP封闭箍这3个变化参数对加固效果的影响。通过对试验结果的分析,推导出碳纤维布加固钢筋混凝土柱根部(尤其在柱根部有CFRP封闭箍的情况)锚固的承载力计算公式,在公式中引进了锚固端碳纤维布起鼓应力折减系数,并将理论计算结果与试验结果进行了比较。结果表明,采用的计算方法与试验值误差较小,且偏于安全,可供工程加固设计时参考。
Based on the destructive test of the anchorage of RC columns with three CFRP sheets, the effects of the reinforcement, anchorage length, and the presence or absence of CFRP enclosures on the columnar section under the same cross-sectional dimensions and reinforcement were analyzed Effect of Variation Parameters on Reinforcement Effect. Through the analysis of test results, the formula of bearing capacity of carbon fiber reinforced concrete columns reinforced with CFRP closed hoop is deduced. In the formula, the anchorage end carbon fiber cloth is introduced into drum stress reduction coefficient , And the theoretical calculation results are compared with the test results. The results show that the error between the calculation method and the experimental value is small, and it is biased to safety so that it can be used as a reference for engineering reinforcement design.