The Experimental Studies on Behavior of Ultrahigh-Performance Concrete Confined by Hybrid Fiber-Reinforced Polymer Tubes

Table 6

The strength model parameters for each group of specimen.

Specimen group	Model parameters		The goodness of fit
	A/BFRP series	3.5	0.897	0.99
B/GFRP series	3.1	0.997	0.98
C/BFRP series	5.9	1.329	0.99
C/GFRP series	4.5	0.917	0.96