高温下碳纤维-混凝土界面受剪性能试验研究

Researches on Mechanical Property of CFRPconcrete Interface at Elevated Temperatures

摘要:

分别在4,40,60,80,100,120,140,160,180 ℃下进行碳纤维混凝土界面的剪切试验,研究了不同温度下界面破坏形式、温度对胶体及碳纤维的影响,以及黏结强度随温度的变化规律,初步建立了不同温度下的黏结应力—滑移关系.试验结果表明,40 ℃时的界面黏结强度高于其他温度;40 ℃后黏结强度随温度升高而降低;温度超过100 ℃后,黏结强度基本趋于稳定.

Abstract:

The shear tests of CFRPConcrete interface specimens were executed at different temperatures,4,40,60,80,100,120,140,160,180 ℃,to investigate the changing regulation of the interface strength with temperature,the failure type and the influence of the temperature on the adhesive and carbon fiber reinforced polymer(CFRP).The relationship between the bond stress and slip was preliminarily established at different temperatures.The test results show that the interface bond strength at 40 ℃ is the maximum,and the interface strength decreases when the temperature is over 40 ℃,and then remains stable when the temperature is over 100 ℃.