Table 3: Comparison of natural frequencies of the undamaged and delaminated concrete decks for numerical example under SS-F-SS-F support condition.

ModeUndamaged1/8 delaminated1/6 delaminated1/5 delaminated1/4 delaminated1/3 unsymmetrical delaminated1/3 symmetrical delaminated1/2 delaminated
Mode ShapeFreqFreqDifferenceFreqDifferenceFreqDifferenceFreqDifferenceFreqDifferenceFreqDifferenceFreqDifference
(Hz)(Hz)(%)(Hz)(%)(Hz)(%)(Hz)(%)(Hz)(%)(Hz)(%)(Hz)(%)

11st bending18.8818.70−0.9418.63−1.3218.57−1.6518.43−2.4017.67−6.3918.29−3.1013.28−29.64
22nd bending22.6922.42−1.2022.30−1.7022.19−2.1821.90−3.4620.60−9.1922.08−2.6818.67−17.72
33rd bending37.0136.50−1.3835.91−2.9634.56−6.6329.77−19.5724.35−34.2126.87−27.3921.81−41.06
44th bending57.6452.79−8.4242.31−26.5937.87−34.2935.76−37.9633.28−42.2638.76−32.7627.53−52.24
55th bending73.4756.89−22.5755.36−24.6654.07−26.4051.22−30.2843.50−40.7947.21−35.7527.89−62.04
66th bending76.4473.42−3.9571.58−6.3568.91−9.8459.98−21.5345.70−40.2151.12−33.1237.55−50.87