Table 5: Comparison of natural frequencies of the undamaged and delaminated concrete decks for numerical example supported on beams.

ModeUndamaged1/4 delaminated1/3 delaminated
Mode shapeFreqFreqDifferenceFreqDifference
(Hz)(Hz)(%)(Hz)(%)

11st bending11.5111.47−0.3711.43−0.68
22nd bending17.9117.80−0.6217.65−1.45
33rd bending22.1921.26−4.1919.38−12.70
44th bending24.3323.86−1.9223.34−4.07
55th bending37.3930.05−19.6325.00−33.13
66th bending47.8135.97−24.7733.57−29.78