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

Table 1

Measured data of the cracking pattern for the beam B1 at the 1st test stage (unit: m).

Number	South side			North side
	Location	Depth	Spacing	Location	Depth	Spacing
1	1.159	0.149	—	1.083	0.119	—
2	1.296	0.119	0.137	1.302	0.168	0.219
3	1.605	0.218	0.309	1.512	0.098	0.210
4	1.761	0.168	0.156	1.708	0.165	0.196
5	2.004	0.186	0.244	2.010	0.124	0.302
6	2.148	0.051	0.144	2.151	0.161	0.141