Table 4: Comparison of natural frequencies of the undamaged and delaminated concrete decks for numerical example under C-F-C-F support condition.

ModeUndamaged1/6 delaminated1/5 delaminated1/4 delaminated
Mode shapeFreqFreqDifferenceFreqDifferenceFreqDifference
(Hz)(Hz)(%)(Hz)(%)(Hz)(%)

11st bending29.1928.06−3.8727.50−5.7925.54−12.51
22nd bending31.9631.02−2.9630.74−3.8130.05−5.98
33rd bending41.7639.82−4.6336.82−11.8333.23−20.43
44th bending60.6643.60−28.1341.32−31.8939.89−34.23
55th bending73.7157.95−21.3856.44−23.4353.08−28.00
66th bending76.9472.13−6.2569.77−9.3260.70−21.11