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采用文献中的FRP-混凝土粘结单剪试验的355组试验数据,对5个界面粘结强度模型进行了分析评估;对其中的两个界面粘结强度模型进行了修正和重新评估。以剪切试验中的几何参数与粘结材料的力学性能作为自变量,以试验中得到的界面粘结强度为因变量,提出了两种不同参数为独立变量方法回归模型,得到了非线性方程,提出了长度效应系数与宽度效应系数的概念。对实验数据结果及粘结强度模型计算分析表明:理论预测与试验值有不同程度的精确性;FRP粘结长度是影响粘结强度的一个独立变量,给出的非线性模型不仅有更高的精度,且无需另外定义有效粘结长度。长度效应系数可以用来修正未考虑粘贴长度影响的近似解析模型。
Five groups of interfacial bond strength models were analyzed and evaluated using 355 test data in FRP-concrete single-shear test in the literature. Two of the interfacial bond strength models were revised and re-evaluated. Taking the geometrical parameters of shear test and the mechanical properties of the bonding material as independent variables and the interfacial bond strength obtained in the experiment as the dependent variable, two regression models with different parameters as independent variables were proposed, and the nonlinear equation , Put forward the concept of length effect coefficient and width effect coefficient. The results of the experimental data and the bond strength model show that the theoretical predictions and test values have different degrees of accuracy. The bond length of FRP is an independent variable that affects the bond strength. The nonlinear model given is not only higher Accuracy, and without the need to additionally define the effective bond length. The length effect coefficient can be used to correct an approximate analytical model that does not consider the effect of pasting length.