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将粘贴碳纤维(CFRP)粘贴于混凝土表面来加固钢筋混凝土结构的方法,由于施工便捷而被广泛应用。但是粘贴CFRP所用的环氧类胶黏剂对温度过于敏感,明显影响加固效果。尤其是用CFRP加固的混凝土结构的耐火性能很差,限制了这一加固技术的推广。本文在先后2次对不同温度下CFRP-混凝土界面粘结滑移行为试验研究的基础上,结合目前已有的研究成果,对CFRP-混凝土界面粘结滑移行为受温度影响的特性进行评述,并从材性方面对温度对界面的粘结滑移行为的影响进行了机理分析,为分析常温下CFRP加固混凝土结构受力性能和高温(火灾)下防火保护的CFRP加固混凝土结构抗火性能提供了依据。
The method of affixing the carbon fiber (CFRP) to the concrete surface to reinforce the reinforced concrete structure is widely used due to the convenient construction. However, the epoxy adhesives used in pasting CFRP are too sensitive to temperature and significantly affect the reinforcement effect. In particular, the fire resistance of concrete structures reinforced with CFRP is poor, limiting the promotion of this reinforcement technology. In this paper, two times on the CFRP-concrete interface at different temperatures under the experimental study of the bond slip behavior, combined with the existing research results, CFRP-concrete interface bond slip behavior of temperature-dependent characteristics are reviewed, In addition, the effect of temperature on the bond-slip behavior of interface was analyzed from the aspects of material properties. In order to provide a theoretical basis for analyzing the mechanical properties of CFRP-strengthened concrete structures under normal temperature and the fire resistance of CFRP-strengthened concrete structures under fire (high temperature) The basis.