Fragility-Based Improvement of System Seismic Performance for Long-Span Suspension Bridges

Table 1

Uncertainty parameters incorporated in the modeling design.

Modeling parameter		Probability distribution	Mean	COV	Unit	Source
Concrete compressive strength	C55	Normal	46.6	0.149	MPa	[20]
	C35		32.1	0.164
Steel yield strength	HRB500	Lognormal	569.6	0.0743	MPa
	HRB400		455.7
	HRB335		381.6
Friction coefficient	Sliding pot bearing	Uniform	0.03	0.33	—	[14]
	Fixed pot bearing	Lognormal	0.2	0.002	—	[7]
Abutment	Passive stiffness	Uniform	20.15	0.25	kN/mm/m	[7]
	Active stiffness	Uniform	14.0	0.29	kN/mm/pile	[9]
Gap	Deck-deck	Normal	760	0.2	mm	[7]
	Deck-abutment		80
	Deck-shear key	Uniform	120	0.29	mm	[16]
Damping ratio		Uniform	1	0.1	—	[7]
Deck mass		Normal	0.02	0.15	—	[28]

COV: coefficient of variation.