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

Table 4

Summary of test results.

Specimen group	(MPa)	(MPa)	Confinement ratio	Ultimate strength (MPa)	Ultimate axial strain ()	Ultimate hoop strain (με)	Confinement effectiveness	Axial strain ratio
P0	N/A	N/A	N/A	82.8	3080	829	N/A	N/A
A1B1	11.48	253.84	0.13	130.4	12750	8960	1.57	4.76
A2B2	22.95	507.68	0.26	168.0	18050	14730	2.03	6.74
A3B3	34.43	761.52	0.39	208.1	19680	15070	2.51	7.34
B1G1	13.38	285.59	0.16	122.8	11090	7760	1.48	4.14
B2G2	26.76	571.18	0.32	165.2	16690	10570	2.00	6.23
B3G3	40.14	856.77	0.48	204.1	18920	11920	2.46	7.06
C1B1	10.17	442.64	0.12	110.7	8690	5250	1.34	3.24
C2B2	20.34	885.28	0.25	162.4	10440	6870	1.96	3.90
C3B3	30.51	1327.92	0.37	213.2	12850	8980	2.57	4.79
C1G1	12.14	478.66	0.15	154.0	10120	7190	1.86	3.78
C2G2	24.28	957.32	0.29	192.2	14650	10820	2.32	5.47
C3G3	36.42	1435.98	0.44	260.2	18940	12460	3.14	7.07
C2AG	18.87	598.67	0.23	128.6	10330	6900	1.55	3.85
C2A2G2	32.16	1073.08	0.38	201.7	16080	11160	2.44	6.00
C2BG	17.54	609.12	0.21	139.5	10450	6310	1.68	3.90
C2B2G2	31.02	1143.54	0.37	195.3	14960	10670	2.36	5.58