A New Procedure for Damage Assessment of Prestressed Concrete Beams Using Artificial Neural Network

Table 1

Sample training data.

Load kN	Natural frequency (Hz) at various damage levels
	0%	33.33%	66.66%	83%
	P7B1	P7CB1	P7CB3	P7CB4
0	23.5	22.58	21.36	20.75
10	23.5	22.58	21.36	20.75
20	23.5	22.58	21.36	20.14
30	23.5	21.97	20.75	18.92
40	22.28	21.36	19.53	—
50	21.36	20.75	—	—
60	16.48	—	—	—