Stress-Strain Relation of Steel-Polypropylene-Blended Fiber-Reinforced Concrete under Uniaxial Cyclic Compression

Table 5

Elastic stiffness versus unloading strain for concrete specimens.

S000P000		S000PA15		SB15P000		SB10PA15		SB15PA15		SB20PA15
0.00	53.86	0.00	71.35	0.00	67.62	0.00	75.34	0.00	75.06	0.00	84.00
1.02	33.28	0.99	50.20	1.01	50.13	1.03	57.82	0.92	70.85	0.96	74.21
1.82	22.70	2.43	34.50	3.46	20.60	3.51	36.46	2.46	29.99	2.48	29.92
2.82	15.92	4.68	15.30	4.50	19.16	4.58	25.53	3.54	20.57	3.54	23.46
4.05	8.51	5.79	10.49	5.54	15.57	5.61	21.26	4.62	13.71	4.60	19.02
5.10	6.34	6.84	8.35	6.58	13.82	6.65	18.42	5.68	10.77	5.65	17.22
6.15	4.54	7.88	7.00	7.62	12.35	7.68	15.59	6.72	8.86	6.69	15.15
7.20	3.97	8.90	5.83	8.65	11.14	8.69	13.62	7.75	7.66	7.72	13.78
8.23	3.03	9.91	5.18	9.69	10.20	9.73	12.01	8.80	6.62	8.74	12.78
9.24	2.56	10.94	4.86	10.69	9.37	10.75	10.82	9.81	6.05	9.77	12.08
10.26	2.25	11.95	4.29	11.73	8.67	12.78	10.22	10.82	5.69	10.78	11.35
11.28	1.96	12.95	3.85	12.74	8.13	13.78	8.56	11.85	5.15	11.79	10.85
12.27	1.89	—	—	13.77	7.81	—	—	12.86	4.91	12.81	10.46
SA15PA15		SC15PA15		SB15PA10		SB15PA20		SB15PB15		SB15PC15
0.00	61.29	0.00	66.04	0.00	59.00	0.00	58.07	0.00	68.49	0.00	65.02
1.02	42.40	1.00	57.39	1.10	27.48	1.19	33.48	1.04	51.33	1.00	49.74
2.38	30.29	2.44	30.67	2.44	31.26	2.44	31.98	2.42	32.29	2.42	33.70
3.49	21.85	3.48	24.72	3.54	21.77	3.52	23.46	3.48	24.52	3.51	22.21
4.56	14.59	4.55	21.30	4.56	17.08	4.58	16.44	4.56	19.84	4.59	14.79
5.64	11.68	5.60	17.48	5.62	14.26	5.64	12.06	5.63	14.71	5.67	11.26
6.70	9.87	6.64	14.79	6.65	12.70	6.70	9.50	6.69	11.40	6.71	9.06
7.75	8.67	7.69	12.53	7.68	11.59	7.73	7.79	7.71	9.51	7.75	7.79
8.76	7.85	8.73	10.65	8.71	10.62	8.77	6.52	8.74	8.15	8.79	6.72
9.20	10.21	9.76	9.38	9.74	9.70	9.80	5.58	9.77	7.10	9.80	5.89
10.82	6.45	10.79	8.04	10.74	9.07	10.82	4.91	10.81	6.29	10.83	5.27
11.84	5.92	11.80	7.31	11.79	8.44	11.84	4.40	11.82	5.73	11.85	4.78
12.84	5.52	12.82	6.47	12.79	7.92	12.85	4.07	12.84	5.21	12.88	4.55
13.86	5.45	—	—	13.82	7.46	13.87	3.64	13.85	4.90	13.89	4.21