海洋环境下CFRP-混凝土粘结性能的试验研究

Experimental Study on Bond Performance between CFRP and Concrete in Seawater Environment

为全面了解海水环境下CFRP-混凝土界面粘结性能的变化规律,采用单面剪切试验方法,考虑混凝土强度、CFRP的宽度、CFRP的粘贴长度以及海水侵蚀时间等因素,对CFRP-混凝土的粘结性能进行了深入研究。试验结果表明:随着侵蚀时间的增加,界面粘结强度总体呈缓慢下降的趋势;荷载滑移曲线上拐点所对应的滑移值以及最大滑移值有所增加;剪应力分布曲线可以较好的反应出界面的剥离过程;混凝土强度等级对粘结强度的影响程度较小。

In order to obtain the variation of the interface bond performance between CFRP and concrete in seawater environment,the single shear test is adopted to study the bond performance of CFRP-concrete with the emphasis on the effects of concrete compression strength,width of CFRP,bond length of CFRP and seawater erosion time.The test results show that the interface bond strength between CFRP and concrete has a slowly downward trend with the increase of erosion time;The slip value corresponding to the inflection point of load-slip curve and the maximum slip value have a certain increase;The shear stress distribution curve can show the interface debonding process between CFRP and concrete;The concrete compression strength has a small impact on the bond strength.