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近年来CFRP加固混凝土结构技术在国内外受到了广泛的应用,国内外学者对该结构的耐久性能开展了大量的研究,但针对其在冻融坏境下的粘结破坏机理的研究仍不够充分。针对这一现象,研究通过对CFRP-混凝土试件经冻融侵蚀后做单面剪切实验,探讨了冻融循环次数以及不同粘结顺序对CFRP-混凝土的粘结强度的影响。结果表明:冻融循环对CFRP板的影响较小,在一定的冻融循环次数下混凝土的强度逐渐增加,冻融循环对粘结界面的影响较混凝土大,界面损伤对CFRP-混凝土承载能力的影响较大。
In recent years, CFRP reinforced concrete structure technology has been widely used at home and abroad, domestic and foreign scholars on the durability of the structure to carry out a large number of studies, but for its freeze-thaw environment in the bonding failure mechanism is not sufficient . In response to this phenomenon, CFRP-concrete specimens were subjected to single-sided shear tests after freezing-thawing, and the effects of freeze-thaw cycles and bonding sequences on the bond strength of CFRP-concrete were discussed. The results show that the effect of freeze-thaw cycle on the CFRP board is small. The strength of concrete increases gradually with the number of freeze-thaw cycles. The effect of freeze-thaw cycles on the interface is larger than that of concrete. The effect of interface damage on the load- Greater impact.