Damage Identification for Prestressed Adjacent Box-Beam Bridges

Table 1

Damage cases for evaluating CFTM method.

Case ()	Type ()	Component ()	Location (m) ()	Reduction in modulus (%) ()
1	Local	Beam 6	6.10–7.62	10 2.3]
2	Local	Beam 1	10.67–12.19	50 8.3]
3	Global	Beam 5	0–15.24	10
4	Global	Beam 9	0–15.24	50
5	Combination 1	Beam 2	9.14–10.67	50 13.3]
		Beam 5	1.52–3.05	10 0.4]
		Beam 8	4.57–6.10	25 4.8]
6	Combination 2	Beam 2	0–15.24	25
		Beam 4	6.10–7.62	50 17.6]
		Beam 9	9.14–10.67	10 1.7]
7	Combination 3	Beam 2	0–15.24	10
		Beam 4	10.67–12.19	25 2.9]
		Beam 9	0–15.24	30
8	Combination 6	Beam 3	3.05–4.57	50 8.3]
		Beam 3	0–15.24	25
		Shear Key 6-7	0–15.24	—
9	Combination 7 (BR 35-17-6.80)	Beam 1	0–15.24	30
		Shear Key 2-3	0–15.24	—
		Shear Key 8-9	0–15.24	—

Number in indicates percent reduction in equivalent modulus for local damage cases.