Crack Propagation Analysis of Synthetic vs. Steel vs. Hybrid Fibre-Reinforced Concrete Beams Using Digital Image Correlation Technique

International Journal of Concrete Structures and Materials

Table 4 Average equivalent flexural strength calculation for all specimens.

Specimen	F_L (kN)	f_If (N/mm²)	f_{Equation (0–0.6)} (N/mm²)	f_{Equation (0.6-3)} (N/mm²)	D₀= (f_{Equation (0–0.6)}/f_If))	D₁= (f_{Equation (0.6–3)}/f_eq (0-0.6))
Control	13.911	4.01	1.57	–	0.39	–
PO50	13.596	3.92	1.76	0.97	0.45	0.55
PO75	14.550	4.19	1.86	1.43	0.44	0.77
PO100	12.967	3.73	2.53	2.48	0.68	0.98
HB50	14.886	4.29	2.41	1.90	0.56	0.79
HB75	16.083	4.63	2.35	2.09	0.51	0.89
HB100	16.531	4.76	3.23	3.12	0.68	0.97
SF50	15.325	4.41	3.19	2.63	0.72	0.82
SF75	17.115	4.93	3.58	3.32	0.73	0.93
SF100	17.345	5.00	4.34	4.23	0.87	0.98