A Unified Formula for Calculation of Crack Width and Spacing in Reinforced Concrete Beams

International Journal of Concrete Structures and Materials

Table 8 Comparison of experimental \(w_{{{\text{max}}}}^{{\text{t}}}\) with calculated \(w_{{{\text{max}}}}^{{\text{c}}}\) by different codes and methods.

Data sources	No. of data/n	ACI 318-99 (1999)		EN 1992-1-1 (2004)		GB50010 (2010)		SL/T 191-2008 (2009)		DL/T5057-2009 (2010)
Data sources	No. of data/n	μ	δ	μ	δ	μ	δ	μ	δ	μ	δ
335 MPa	141	1.02	0.28	0.77	0.22	0.95	0.26	0.89	0.27	0.82	0.24
400 MPa	85	0.86	0.24	0.88	0.25	0.84	0.23	1.01	0.23	0.83	0.21
500 MPa	113	0.98	0.27	1.12	0.32	1.00	0.32	1.17	0.28	0.99	0.27
600 MPa	115	1.00	0.21	0.92	0.20	0.91	0.23	0.96	0.21	0.90	0.19
Sum	454	0.98	0.24	0.91	0.30	0.92	0.26	1.00	0.27	0.89	0.25

Data sources	No. of data /n	1st Zhao and Guan (2011)		JTG D62-2012 (2012)		JTJ 267 -98 (1998)		TB10002.3-2005 (2005)		2nd Zhao and Guan (2010)
Data sources	No. of data /n	μ	δ	μ	μ	δ	δ	μ	δ	μ	δ
335 MPa	141	0.99	0.28	1.14	1.26	0.27	0.27	1.26	0.27	0.89	0.20
400 MPa	85	0.73	0.24	0.98	0.94	0.26	0.19	0.94	0.26	0.99	0.19
500 MPa	113	0.87	0.33	1.07	1.03	0.26	0.26	1.03	0.26	1.21	0.24
600 MPa	115	0.84	0.18	1.03	0.92	0.21	0.21	0.92	0.21	1.13	0.22
Sum	454	0.84	0.27	1.03	1.06	0.29	0.27	1.06	0.29	1.05	0.26