干湿交替环境中CFRP加固预裂RC梁耐久性试验

Endurance experiment of the precracked RC beams reinforced by CFRP in dry and wet alternative environment

对干湿交替环境中CFRP加固预裂RC梁的耐久性能进行了试验研究,重点分析了干湿交替环境对RC梁的界面破坏特征、刚度、跨中截面混凝土应变和CFRP应变变化的影响,结果表明:干湿交替环境弱化了CFRP与混凝土界面的粘结性能,对加固效果有一定的不利影响。

It makes an experimental research of the endurance of precracked RC beams reinforced by CFRP in dry and wet alternative environment, and puts an emphasis on the analysis of the influence of dry and wet alternative environment to the interface destruction features, rigidneess, concrete strain of mid-span interface and CFRP strain change of RC beams. The result shows that dry and wet alternative environment weakens the sticking property of CFRP and concrete interface, which is harmful to reinforcement effect at some extent.