Dynamic Property Analysis of Orthotropic Bridge Deck with Local Fatigue Crack

Table 1

Global natural vibration frequency.

Global mode	Frequency (Hz)
	Healthy	Type 1			Type 2			Type 3
		Case 1	Case 2	Case 3	Case 1	Case 2	Case 3	Case 1	Case 2
Mode 1	2.01996	2.01996	2.01995	2.01996	2.01996	2.01994	2.01996	2.01996	2.01996
Mode 2	5.61723	5.61723	5.61721	5.61723	5.61722	5.61717	5.61722	5.61723	5.61709
Mode 3	9.72333	9.72333	9.72317	9.72328	9.72332	9.72308	9.72333	9.72333	9.72330
Mode 4	10.00013	10.00012	9.99951	9.99998	10.00008	9.99870	10.00012	10.00011	9.99927
Mode 5	14.40052	14.40052	14.40014	14.40049	14.40049	14.39960	14.40052	14.40049	14.39868