Calculation on Bending Stiffness of RC Short Beam Strengthened by CFRP

Table 7

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

Beam ID
	Exp.	Cal.	Ratio	Exp.	Cal.	Ratio	Exp.	Cal.	Ratio
B-0-30-4	2.22	2.38	0.933	0.86	0.95	0.906	1.50	1.64	0.915
B-1-30-4	4.97	3.88	1.281	0.98	1.12	0.879	2.84	2.87	0.990
B-2-30-4	3.71	3.39	1.094	1.12	1.11	1.009	2.75	3.21	0.857
B-1-20-4	3.68	3.30	1.115	1.14	1.03	1.107	2.80	2.76	1.014
B-1-40-4	5.26	3.98	1.322	1.42	1.28	1.109	3.40	2.96	1.149
B-1-30-6	3.58	3.06	1.170	1.46	1.23	1.187	4.90	4.05	1.210
B-1-30-8	2.89	2.49	1.161	1.44	1.37	1.051	4.61	4.32	1.067
Mean value	3.76	3.21	1.154	1.20	1.16	1.035	3.26	3.12	1.029
Mean-square deviation	1.07	0.62	0.128	0.24	0.15	0.112	1.17	0.89	0.124
Coefficient of variation	0.28	0.19	0.111	0.20	0.13	0.108	0.36	0.28	0.121

is cracking stiffness. is yield stiffness. is ultimate stiffness.