Calculation on Bending Stiffness of RC Short Beam Strengthened by CFRP

Table 6

Experimental and calculated values of cracking curvature, yield curvature, and ultimate curvature of members.

Beam ID
	Exp.	Cal.	Ratio	Exp.	Cal.	Ratio	Exp.	Cal.	Ratio
B-0-30-4	9.98	8.94	1.116	0.592	0.553	1.071	4.965	4.363	1.138
B-1-30-4	6.71	7.45	0.900	0.640	0.532	1.203	3.313	3.328	0.995
B-2-30-4	8.82	7.70	1.144	0.568	0.593	0.958	4.302	3.556	1.210
B-1-20-4	7.52	7.66	0.982	0.453	0.578	0.784	3.367	3.391	0.993
B-1-40-4	7.29	8.10	0.900	0.401	0.468	0.857	2.970	3.308	0.898
B-1-30-6	7.68	7.50	1.024	0.673	0.833	0.808	2.442	2.976	0.821
B-1-30-8	10.60	11.10	0.955	0.753	0.783	0.962	2.686	2.971	0.904
Mean value	8.37	8.35	1.003	0.580	0.62	0.949	3.44	3.41	0.994
Mean-square deviation	1.47	1.32	0.098	0.120	0.14	0.150	0.90	0.47	0.138
Coefficient of variation	0.18	0.16	0.097	0.210	0.22	0.158	0.26	0.14	0.139

is cracking curvature. is yield curvature. is ultimate curvature.