Delamination Detection of Reinforced Concrete Decks Using Modal Identification

Figure 10

Typical time signals of vertical sensor V4 and PSD estimates of them: upper row is for undamaged model, lower row is for 22.2% delaminated model: (a) due to swept sine excitations; (b) due to random excitations; (c) due to impact excitations.

(a)

(b)

(c)