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为研究温度作用对碳纤维(CFRP)—混凝土黏结界面剪切性能的影响,首先进行了温度作用下不同固化条件的胶黏剂黏结性能试验,研究了温度作用及固化方式对胶黏剂拉伸剪切性能的影响.试验发现,玻璃化温度是影响胶黏剂高温性能的一个重要指标,温度作用下胶黏剂材料的黏结性能退化大部分发生在其玻璃化转变区域.其次,结合常温下已有的CFRP—混凝土界面黏结应力—滑移关系提出了温度作用下界面黏结应力—滑移关系的计算方法.最后,汇总和分析了目前已有的CFRP—混凝土界面试验研究结果,引入胶黏剂玻璃化温度这一参数,给出了温度作用下CFRP—混凝土界面剪切黏结强度、极限承载力和初始剪切刚度计算模型.
In order to study the effect of temperature on the shear properties of carbon fiber (CFRP) -consolidated bonded interface, firstly, the adhesive properties of the adhesive under different curing conditions were tested. The effects of temperature and curing methods on the tensile properties of the adhesive Cutting performance.The experiment found that the glass transition temperature is an important index that affects the high temperature performance of the adhesive.At the temperature, most of the degradation of the adhesive properties of the adhesive material occurs in the glass transition region.Secondly, Some CFRP-concrete interfacial bond stress-slip relationship between the temperature under the interface bond stress-slip relationship calculation method.Finally, the summary and analysis of the existing CFRP-concrete interfacial test results, the introduction of adhesive Glass transition temperature, the calculated shear bond strength, ultimate bearing capacity and initial shear stiffness at CFRP-concrete interface under temperature are given.