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采用P值检验法和最大曲率法对碳纤维增强复合材料(CFRP)片材-C60高强混凝土黏结界面的冻融损伤进行定量化评估,分析CFRP-C60高强混凝土冻融损伤的劣化特征点及其相关规律。结果表明:初劣点、陡劣点及最大曲率等指标可以准确地反映CFRP-C60高强混凝土冻融劣化过程的特征,CFRP-C60高强混凝土的各项剪切试验参数在冻融循环次数N=113左右时开始初步劣化,在N=152左右时开始显著劣化,并且黏结本构参数Sf和Gf的劣化要早于承载力参数F0和F1;冻融循环对CRFP-C60高强混凝土界面最大剪应力所对应的应变无明显影响。
The freeze-thaw damage of CFRP sheet-C60 high-strength concrete was quantitatively evaluated by P-value test and maximum curvature method. The characteristics of the freeze-thaw damage of CFRP-C60 high-strength concrete and their correlation were analyzed law. The results show that the characteristics of CFRP-C60 high-strength concrete can accurately reflect the characteristics of CFRP-C60 high-strength concrete. The shear test parameters of CFRP-C60 high-strength concrete vary with the number of freeze-thaw cycles N = 113 began to deteriorate, and began to deteriorate significantly at about N = 152, and the deterioration of bond constitutive parameters Sf and Gf was earlier than the bearing capacity parameters F0 and F1. The maximum shear stress on the interface of CRFP-C60 high-strength concrete The corresponding strain has no obvious effect.