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

Table 7

Comparison of confinement models for predicting ultimate strains.

Specimen group	(MPa)	Samaan model [18]		Toutanji model [12]		Lam-Teng model [19]		Pham model [27]; ()
		()		()		()		()
A1B1	253.84	58336	0.22	28970	0.44	11966	1.07	4229	3.01
A2B2	507.68	86473	0.21	50067	0.36	19242	0.94	10168	1.25
A3B3	761.52	103439	0.19	69567	0.28	26518	0.74	13309	1.36
B1G1	285.59	67853	0.16	35271	0.31	13409	0.83	3958	4.97
B2G2	571.18	98778	0.17	61426	0.27	22128	0.75	6857	1.62
B3G3	856.77	116748	0.16	85600	0.22	30847	0.61	9797	1.70
C1B1	442.64	46693	0.19	16670	0.52	9484	0.92	3618	5.23
C2B2	885.28	65761	0.16	28788	0.36	14279	0.73	5582	1.56
C3B3	1327.92	73555	0.17	39113	0.33	19073	0.67	9465	1.10
C1G1	478.66	55089	0.18	21335	0.47	10883	0.93	4546	2.83
C2G2	957.32	71748	0.20	35350	0.41	17076	0.86	10194	0.99
C3G3	1435.98	81316	0.23	49243	0.38	23270	0.81	16136	0.91
C2AG	598.67	73071	0.14	32848	0.31	14222	0.73	4691	4.04
C2A2G2	1073.08	85054	0.19	45130	0.36	19355	0.83	11036	0.94
C2BG	609.12	67115	0.16	34469	0.30	16818	0.62	4414	3.64
C2B2G2	1143.54	80247	0.19	52767	0.28	26521	0.56	10887	0.96
Average	N/A	N/A	0.18	N/A	0.35	N/A	0.79	N/A	2.25