Crack Detection of Reinforced Concrete Member Using Rayleigh-Based Distributed Optic Fiber Strain Sensing System

Table 1

Loading steps in the experiment.

Step	Load (kN)
1	120
2	200
3	240
4	300
5	350
6	400
7	500
8	600
9	700
10	800
11	900
12	1000
13	1200
14	1400
15	1600
16	1800
17	2000
18	2200
19	2400
20	2600