Analysis on the Time-Varying Fragility of Offshore Concrete Bridge

Table 6

Limit state of bearing.

Quote	J. Zhang	Bryant	Choi	Choi	Zhang Y	Zhang Y
	[4]	[5]	[6]	[6]	[7]	[7]
Type of bearing	Rubber bearing	Movable steel bearing	——	Rubber bearing	Polytetrafluoroethylene skateboard bearing	Rubber bearing
Damage index	Shear strain	Displacement	Displacement	Displacement	Displacement	Ductility of displacement
		(mm)	(mm)	(mm)	(mm)
Completion state	γ < 100%	Δ < 37	Δ < 0	Δ < 30	Δ < 90	μ < 1
Minor damage	100% ≤ γ < 150%	37 ≤ Δ < 104	0 ≤ Δ < 50	30 ≤ Δ < 100	90 ≤ Δ < 150	1 ≤ μ< 1.5
Medium damage	150% ≤ γ < 200%	104 ≤ Δ < 136	50 ≤ Δ < 100	100 ≤ Δ < 150	150 ≤ Δ < 200	1.5 ≤ μ< 2
Serious damage	200% ≤ γ < 250%	136 ≤ Δ < 187	100 ≤ Δ < 150	150 ≤ Δ < 255	200 ≤ Δ < 300	2 ≤ μ< 2.5
Complete collapse	γ ≥ 250%	Δ ≥ 187	Δ ≥ 150	Δ ≥ 255	Δ ≥ 300	μ ≥ 2.5