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

Figure 11

Damage status at 5.4% drift at side view (a), strain profile measured on side steel bar F at drift levels below 1.75% (b), and strain profile measured on side steel bars D, E, and F at 1.75% and 4.8% drift levels (c, d).