Assessing the Instantaneous Stiffness of Cracked Reinforced Concrete Beams Based on a Gradual Change in Strain Distributions

Table 2

Measured data of the cracking pattern for the beam B1 at the 2nd test stage (unit: m).

Number	South side			North side
	Location	Depth	Spacing	Location	Depth	Spacing
1	—	—	—	0.916	0.091	—
2	1.163	0.225	—	1.096	0.228	0.181
3	1.302	0.207	0.139	1.314	0.267	0.218
4	1.615	0.273	0.313	1.527	0.250	0.212
5	1.768	0.243	0.153	1.733	0.264	0.207
6	—	—	—	1.865	0.092	0.132
7	2.015	0.274	0.247	2.017	0.180	0.151
8	2.157	0.181	0.142	2.165	0.263	0.149
9	—	—	—	2.406	0.132	0.240