【摘要】 随着FRP加固结构的广泛应用,其耐久性问题也日益突出并受到关注。FRP与混凝土粘结的耐久性能与FRP材料的耐久性同等重要。光老化(尤其是紫外线)是影响FRP与混凝土粘结耐久性的环境因素的一种。对两种粘结形式的FRP与混凝土粘结性能进行了紫外线老化试验研究和分析,考察CFRP-混凝土拉伸剪切强度和正拉粘结强度随老化时间的变化特性,对比有无防护对CFRP-混凝土正拉粘结强度的影响。结果表明,紫外线对CFRP与混凝土的拉伸剪切强度影响较大,防护能有效缓减CFRP与混凝土的正拉粘结性能在紫外线作用下的劣化。更多还原

【Abstract】 With the wide use of FRP strengthened structures,the problem of their durability has been highlighted and concerned.The durability of adhesive property between CFRP and concrete is as important as that of FRP.Light aging(especially UV light) is one of the factors that influences the durability of adhesive property of CFRP and concrete.The influence of UV light on tow kinds of the adhesive specimens of FRP and concrete bonding property was conducted.The change tendency of mechanical behavior of CFRP and concrete was investigated and the test results were analyzed.The adhesive properties of CFRP and concrete with and without protected were comparion.The results showed that the influence of UV light on adhesive property was great,and protection can slow the deterioration of adhesive strength of CFRP and concrete.更多还原