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通过硫酸盐干湿循环加速腐蚀试验模拟硫酸盐环境,对硫酸盐干湿循环作用下碳纤维增强复材(CFRP)-混凝土界面的黏结性能进行了研究。结果表明:随着腐蚀时间的延长,破坏面进入混凝土层的深度逐渐变浅,黏结强度逐渐降低。通过对试验结果的统计回归分析,建立了硫酸盐干湿循环作用下CFRP-混凝土界面黏结强度退化模型,预测模型能够很好地反映正拉黏结强度随硫酸盐腐蚀时间的退化规律。
The sulphate wet-dry cycle accelerated corrosion test was used to simulate the sulphate environment. The bonding behavior of carbon fiber reinforced composites (CFRP) -concrete interface under the action of sulphate wet-dry cycles was studied. The results show that with the extension of the corrosion time, the depth of the failure surface into the concrete layer gradually becomes lighter and the bond strength gradually decreases. Based on the statistical regression analysis of the test results, the degradation model of bond strength of CFRP-concrete interface under the wet-dry cycle of sulphate was established. The prediction model can well reflect the degradation regularity of the bond strength of the pull-pull with sulfate corrosion time.