A Research on Modification Method for NSM FRP-Concrete Bonded Joints Strength Models

Table 12

Check for the randomness of the model uncertainty factor (AM Model).

Design parameter	Correlation coefficient r		Significance value
	Before	After	Before	After
fc	−0.728	0.090	0.001	0.634
Ef	−0.553	0.158	0.001	0.405
tp	−0.450	0.318	0.013	0.087
tf	−0.636	0.380	0.001	0.038
	−0.528	0.31	0.003	0.096