Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios

Table 4

Summary of experimental data.

Specimen ID	First cracking			Crack width of 0.05 mm		Crack width of 0.10 mm		Crack width of 0.15 mm		Reinforcement yielding state		Peak load		Ultimate load		Failure mode
	Pcr (kN)	Δcr (mm)	σcr (MPa)	(kN)	Δ0.05 (mm)	(kN)	Δ0.10 (mm)	(kN)	Δ0.15 (mm)	Py (kN)	Δy (mm)	Pmax (kN)	Δmax (mm)	Pu (kN)	Δu (mm)
R0-S-8	94.66	1.63	14.3	98.83	1.78	100.22	2.02	105.1	2.74	Unreinforced		105.1	2.735	84.22	4.62	Flexural^‡
R0-S-5	96.05	1.5	14.5	100.92	1.75	107.53	2.07	110.66	2.20	Unreinforced		115.88	2.82	92.57	4.51	Flexural^‡
R0-N-8	79.34	1.69	12.0	81.08	1.71	100.2	2.94	105.1	3.8	Unreinforced		107.53	4.56	86.3	6.02	Flexural^‡
R1.13-S-8	76.91	2.17	11.6	83.87	2.61	100.57	3.56	123.19	4.81	176.44	9.35	200.1	20.2	160.08	48.42	Flexural^†‡
R1.13-S-5	75.86	1.88	11.4	80.39	2.13	110.32	2.73	151.03	4.62	169.13	5.49	214.72	17.75	178.87	46.85	Flexural^†‡
R1.13-N-8	77.26	1.64	11.6	80.04	1.72	104.4	2.68	150.34	4.86	176.09	6.69	194.53	16.38	155.56	41.03	Flexural^†‡
R3.45-S-8	82.48	1.43	12.4	88.39	1.49	199.75	3.31	258.56	4.28	455.53	8.96	486.5	15.66	389.2	107.2	Flexural^†‡
R3.45-S-5	80.39	1.71	12.1	83.52	1.73	171.22	3.45	273.88	5.45	459.01	12.88	464.58	16.56	371.66	99.91	Flexural^†‡
R3.45-N-8	82.13	1.05	12.4	84.91	1.11	175.04	2.69	325.38	5.4	430.82	9.09	479.2	17.83	383.36	84.5	Flexural^†‡

P_cr = flexural cracking load; Δ_cr = flexural cracking deflection; σ_cr = nominal stress at initial cracking; P_y = longitudinal reinforcement yielding load; Δ_y = longitudinal reinforcement yielding deflection;  = peak load; Δ_max = peak load deflection; P_u = ultimate load; Δ_u = ultimate load deflection; ^†yielding of longitudinal reinforcement; ^‡large expansion of flexural crack.